Red (Ordo) jedna je stepenica u biološkoj sistematici. Nalazi se između nadreda (superordo) i podreda (subordo).
U botanici naziv reda, ako se temelji na prezimenu, na latinskom završava na -ales.
Popis redova živog svijeta
A
- ordo Abrothallales - Dothideomycetes
- ordo Acanthobdellida - Clitellata
- ordo Acanthoecida - Choanoflagellatea
- ordo Acanthopleuribacterales - Holophagae
- ordo Acarosporales - Lecanoromycetes
- ordo Accipitriformes - Aves
- ordo Acholeplasmatales - Tenericutes
- ordo Acidilobales - Thermoprotei
- ordo Acidimicrobiales - Actinobacteria
- ordo Acidithiobacillales - Gammaproteobacteria
- ordo Acidobacteriales - Acidobacteria
- ordo Acipenseriformes - Actinopterygii
- ordo Acoela - Xenacoelomorpha
- ordo Aconchulinida - Filosa
- ordo Acorales - Liliopsida
- ordo Acritarcha ordo incertae sedis - Acritarcha classis incertae sedis
- ordo Acrochaetiales - Florideophyceae
- ordo Acroglissida - Peranemea
- ordo Acrospermales - Dothideomycetes
- ordo Acrosymphytales - Florideophyceae
- ordo Actiniaria - Anthozoa
- ordo Actinomycetales - Actinobacteria
- ordo Actinulida - Hydrozoa
- ordo Adapedonta - Bivalvia
- ordo Aeromonadales - Gammaproteobacteria
- ordo Afrosoricida - Mammalia
- ordo Agaricales - Agaricomycetes
- ordo Agaricostilbales - Agaricostilbomycetes
- ordo Agelasida - Demospongiae
- ordo Agyriales - Lecanoromycetes
- ordo Ahnfeltiales - Florideophyceae
- ordo Akentrogonida - Maxillopoda
- ordo Albuliformes - Actinopterygii
- ordo Alcyonacea - Anthozoa
- ordo Alismatales - Liliopsida
- ordo Alteromonadales - Gammaproteobacteria
- ordo Amblypygi - Arachnida
- ordo Amborellales - Magnoliopsida
- ordo Amiiformes - Actinopterygii
- ordo Amphidiniales - Dinophyceae
- ordo Amphidiscosida - Hexactinellida
- ordo Amphilepidida - Ophiuroidea
- ordo Amphilinidea - Cestoda
- ordo Amphinomida - Polychaeta
- ordo Amphionidacea - Malacostraca
- ordo Amphipoda - Malacostraca
- ordo Amphisphaeriales - Sordariomycetes
- ordo Amplistromatales - Sordariomycetes
- ordo Amylocorticiales - Agaricomycetes
- ordo Anaerolineales - Anaerolineae
- ordo Anaeroplasmatales - Tenericutes
- ordo Anaspidacea - Malacostraca
- ordo Anaulales - Mediophyceae
- ordo Anguilliformes - Actinopterygii
- ordo Anisonemida - Peranemea
- ordo Annulatascales - Sordariomycetes
- ordo Anostraca - Branchiopoda
- ordo Anseriformes - Aves
- ordo Anthoathecata - Hydrozoa
- ordo Antipatharia - Anthozoa
- ordo Anura - Amphibia
- ordo Aphelenchida - Secernentea
- ordo Aphragmophora - Sagittoidea
- ordo Apiales - Magnoliopsida
- ordo Aplousobranchia - Ascidiacea
- ordo Aplysiida - Gastropoda
- ordo Apochela - Eutardigrada
- ordo Apodida - Holothuroidea
- ordo Apodiformes - Aves
- ordo Apoikiales - Chrysophyceae
- ordo Apororhynchida - Archiacanthocephala
- ordo Apterygiformes - Aves
- ordo Apusomonadida - Apusomonadea
- ordo Apygophora - Maxillopoda
- ordo Aquificales - Aquificae
- ordo Aquifoliales - Magnoliopsida
- ordo Arachnomycetales - Eurotiomycetes
- ordo Araeolaimida - Adenophorea
- ordo Araneae - Arachnida
- ordo Arbacioida - Echinoidea
- ordo Arcanodiscales - Coscinodiscophyceae
- ordo Archaegladiopsidales - Coscinodiscophyceae
- ordo Archaeoglobales - Archaeoglobi
- ordo Archaeognatha - Insecta
- ordo Archaeorhizomycetales - Archaeorhizomycetes
- ordo Archaeosporales - Glomeromycetes
- ordo Architaenioglossa - Gastropoda
- ordo Arcida - Bivalvia
- ordo Arecales - Liliopsida
- ordo Arguloida - Maxillopoda
- ordo Arhynchobdellida - Clitellata
- ordo Arkhangelskiales - Coccolithophyceae
- ordo Armatimonadales - Armatimonadia
- ordo Arthoniales - Arthoniomycetes
- ordo Arthrotardigrada - Heterotardigrada
- ordo Artiodactyla - Mammalia
- ordo Ascaridida - Secernentea
- ordo Ascoseirales - Phaeophyceae
- ordo Ascosphaerales - Eurotiomycetes
- ordo Asellariales - Zygomycota
- ordo Asparagales - Liliopsida
- ordo Aspidodiadematoida - Echinoidea
- ordo Aspidogastrida - Trematoda
- ordo Aspidosiphoniformes - Phascolosomatidea
- ordo Asterales - Magnoliopsida
- ordo Asterinales - Dothideomycetes
- ordo Asterocladales - Phaeophyceae
- ordo Asterolamprales - Coscinodiscophyceae
- ordo Asterotexales - Dothideomycetes
- ordo Astigmata - Arachnida
- ordo Astrorhizida - Polythalamea
- ordo Ateleopodiformes - Actinopterygii
- ordo Atheliales - Agaricomycetes
- ordo Atheriniformes - Actinopterygii
- ordo Atractiellales - Atractiellomycetes
- ordo Atractophorales - Florideophyceae
- ordo Aulacoseirales - Coscinodiscophyceae
- ordo Aulopiformes - Actinopterygii
- ordo Aurearenales - Phaeothamniophyceae
- ordo Auriculariales - Agaricomycetes
- ordo Austrobaileyales - Magnoliopsida
B
- ordo Axinellida - Demospongiae
- ordo Bacillales - Bacilli
- ordo Bacillariales - Bacillariophyceae
- ordo Bacillariophyta ordo incertae sedis - Bacillariophyta classis incertae sedis
- ordo Bacteroidales - Bacteroidia
- ordo Baeomycetales - Lecanoromycetes
- ordo Baerida - Calcarea
- ordo Balbianiales - Florideophyceae
- ordo Balliales - Florideophyceae
- ordo Bangiales - Bangiophyceae
- ordo Bangiales - Bangiophyceae
- ordo Basidiobolales - Zygomycota
- ordo Bathynellacea - Malacostraca
- ordo Batistiales - Sordariomycetes
- ordo Batrachoidiformes - Actinopterygii
- ordo Batrachospermales - Florideophyceae
- ordo Bdelloidea - Eurotatoria
- ordo Bdellovibrionales - Deltaproteobacteria
- ordo Beloniformes - Actinopterygii
- ordo Berberidopsidales - Magnoliopsida
- ordo Beroida - Nuda
- ordo Beryciformes - Actinopterygii
- ordo Bezerromycetales - Dothideomycetes
- ordo Bicoecida - Bikosea
- ordo Biddulphiales - Mediophyceae
- ordo Biemnida - Demospongiae
- ordo Bifidobacteriales - Actinobacteria
- ordo Bihospitida - Postgaardea
- ordo Bilinguales - Mediophyceae
- ordo Bivalvulida - Myxozoa
- ordo Blastocladiales - Blastocladiomycetes
- ordo Blastocystida - Blastocystea
- ordo Blastodiniales - Dinophyceae
- ordo Blattodea - Insecta
- ordo Bochusacea - Malacostraca
- ordo Bodonida - Kinetoplastea
- ordo Boletales - Agaricomycetes
- ordo Boliniales - Sordariomycetes
- ordo Bonnemaisoniales - Florideophyceae
- ordo Boraginales - Magnoliopsida
- ordo Bothriocephalidea - Cestoda
- ordo Bothrioplanida - Platyhelminthes
- ordo Botrydiales - Xanthophyceae
- ordo Botryosphaeriales - Dothideomycetes
- ordo Bourgueticrinida - Crinoidea
- ordo Brachypoda - Cephalocarida
- ordo Branchiobdellida - Clitellata
- ordo Brassicales - Magnoliopsida
- ordo Briggerales - Mediophyceae
- ordo Brisingida - Asteroidea
- ordo Bruniales - Magnoliopsida
- ordo Bryopsidales - Ulvophyceae
- ordo Bubarida - Demospongiae
- ordo Bucerotiformes - Aves
- ordo Burkholderiales - Betaproteobacteria
- ordo Bursovaginoidea - Gnathostomulida
- ordo Buxales - Magnoliopsida
C
- ordo Calanoida - Hexanauplia
- ordo Caldilineales - Caldilineae
- ordo Caldisericales - Caldisericia
- ordo Callipodida - Diplopoda
- ordo Calosphaeriales - Sordariomycetes
- ordo Camallanida - Secernentea
- ordo Camarodonta - Echinoidea
- ordo Cambojiida - Tentaculata
- ordo Campylobacterales - Epsilonproteobacteria
- ordo Candelariales - Lecanoromycetes
- ordo Canellales - Magnoliopsida
- ordo Cantharellales - Agaricomycetes
- ordo Canuelloida - Hexanauplia
- ordo Capilloventrida - Clitellata
- ordo Capnodiales - Dothideomycetes
- ordo Capparales - Magnoliopsida
- ordo Caprimulgiformes - Aves
- ordo Capsalidea - Monogenea
- ordo Carcharhiniformes - Elasmobranchii
- ordo Cardiida - Bivalvia
- ordo Cardiobacteriales - Gammaproteobacteria
- ordo Carditida - Bivalvia
- ordo Cariamiformes - Aves
- ordo Carnivora - Mammalia
- ordo Carpediemonadida - Carpomonadea
- ordo Carybdeida - Cubozoa
- ordo Caryophyllales - Magnoliopsida
- ordo Caryophyllidea - Cestoda
- ordo Cassiduloida - Echinoidea
- ordo Casuariiformes - Aves
- ordo Catenellopsidales - Florideophyceae
- ordo Cathetocephalidea - Cestoda
- ordo Caudata - Amphibia
- ordo Caulobacterales - Alphaproteobacteria
- ordo Cavibelonia - Solenogastres
- ordo Celastrales - Magnoliopsida
- ordo Cephalaspidea - Gastropoda
- ordo Cephalobaenida - Maxillopoda
- ordo Ceraceosorales - Exobasidiomycetes
- ordo Ceramiales - Florideophyceae
- ordo Ceratodontiformes - Sarcopterygii
- ordo Ceratophyllales - Magnoliopsida
- ordo Cercomonadida - Sarcomonadea
- ordo Cestida - Tentaculata
- ordo Cetacea - Mammalia
- ordo Cetomimiformes - Actinopterygii
- ordo Chaetocerotales - Mediophyceae
- ordo Chaetodermatida - Caudofoveata
- ordo Chaetonotida - Gastrotricha
- ordo Chaetopeltidales - Chlorophyceae
- ordo Chaetophorales - Chlorophyceae
- ordo Chaetosphaeriales - Sordariomycetes
- ordo Chaetosphaeridiales - Coleochaetophyceae
- ordo Chaetothyriales - Eurotiomycetes
- ordo Chamaesiphonales - Cyanophyceae
- ordo Characiformes - Actinopterygii
- ordo Charadriiformes - Aves
- ordo Charales - Charophyceae
- ordo Charophyceae ordo incertae sedis - Charophyceae
- ordo Chattonellales - Raphidophyceae
- ordo Cheilostomatida - Gymnolaemata
- ordo Chimaericolidea - Monogenea
- ordo Chimaeriformes - Holocephali
- ordo Chirodropida - Cubozoa
- ordo Chiroptera - Mammalia
- ordo Chitonida - Polyplacophora
- ordo Chlamydiales - Chlamydiae
- ordo Chlamydomonadales - Chlorophyceae
- ordo Chloramoebales - Synurophyceae
- ordo Chloranthales - Magnoliopsida
- ordo Chlorarachniales (Chlorachniida) - Chlorarachniophyceae (Chlorarachnea)
- ordo Chlorellales - Trebouxiophyceae
- ordo Chlorobiales - Chlorobea
- ordo Chlorocystidales - Ulvophyceae
- ordo Chlorodendrales - Chlorodendrophyceae
- ordo Chloroflexales - Chloroflexia
- ordo Chlorokybales - Chlorokybophyceae
- ordo Chlorophyceae incertae sedis - Chlorophyceae
- ordo Chlorophyta ordo incertae sedis - Chlorophyta classis incertae sedis
- ordo Chloropicales - Chloropicophyceae
- ordo Chondrillida - Demospongiae
- ordo Chondrosiida - Demospongiae
- ordo Chordales - Phaeophyceae
- ordo Chordeumatida - Diplopoda
- ordo Chromatiales - Gammaproteobacteria
- ordo Chromista ordo incertae sedis - Chromista classis incertae sedis
- ordo Chromulinales - Chrysophyceae
- ordo Chroococcales - Cyanophyceae
- ordo Chrysiogenales - Chrysiogenetes
- ordo Chrysomeridales - Chrysomerophyceae
- ordo Chrysoparadoxales - Chrysoparadoxophyceae
- ordo Chrysophyceae ordo incertae sedis - Chrysophyceae
- ordo Chthonomonadales - Chthonomonadetes
- ordo Chytridiales - Chytridiomycetes
- ordo Ciconiiformes - Aves
- ordo Cidaroida - Echinoidea
- ordo Ciliatea ordo incertae sedis - Ciliatea
- ordo Cingulata - Mammalia
- ordo Cladophorales - Ulvophyceae
- ordo Classiculales - Classiculomycetes
- ordo Clathrinida - Calcarea
- ordo Clionaida - Demospongiae
- ordo Clostridiales - Clostridia
- ordo Clupeiformes - Actinopterygii
- ordo Clypeasteroida - Echinoidea
- ordo Coccidiniales - Syndiniophyceae (Syndinea)
- ordo Coccolithales - Coccolithophyceae
- ordo Coccolithophyceae incertae sedis - Coccolithophyceae
- ordo Cocconeidales - Bacillariophyceae
- ordo Coccosphaerales - Coccolithophyceae
- ordo Coelacanthiformes - Sarcopterygii
- ordo Colaconematales - Florideophyceae
- ordo Coleochaetales - Coleochaetophyceae
- ordo Coleoptera - Insecta
- ordo Coliiformes - Aves
- ordo Collembola - Entognatha
- ordo Collemopsidiales - Eurotiomycetes
- ordo Collothecacea - Eurotatoria
- ordo Colponemida - Colponemea
- ordo Columbiformes - Aves
- ordo Comatulida - Crinoidea
- ordo Commatiida - Raphidophyceae
- ordo Commelinales - Liliopsida
- ordo Compsopogonales - Compsopogonophyceae
- ordo Coniochaetales - Sordariomycetes
- ordo Conioscyphales - Sordariomycetes
- ordo Copelata - Appendicularia
- ordo Coraciiformes - Aves
- ordo Corallimorpharia - Anthozoa
- ordo Corallinales - Florideophyceae
- ordo Corallinophycidae ordo incertae sedis - Florideophyceae
- ordo Cordanales - Sordariomycetes
- ordo Corethrales - Coscinodiscophyceae
- ordo Coriobacteriales - Actinobacteria
- ordo Cornales - Magnoliopsida
- ordo Coronatae - Scyphozoa
- ordo Coronophorales - Sordariomycetes
- ordo Corticiales - Agaricomycetes
- ordo Coryneliales - Eurotiomycetes
- ordo Corynodactylales - Florideophyceae
- ordo Coscinodiscales - Coscinodiscophyceae
- ordo Craniida - Craniata
- ordo Craspedida - Choanoflagellatea
- ordo Crassiclitellata - Clitellata
- ordo Craterostigmomorpha - Chilopoda
- ordo Crocodylia - Reptilia
- ordo Crossosomatales - Magnoliopsida
- ordo Cryomonadida - Thecofilosea
- ordo Cryptolobiferida - Tentaculata
- ordo Cryptomonadales - Cryptophyceae
- ordo Cryptomycocolacales - Cryptomycocolacomycetes
- ordo Cryptophyceae ordo incertae sedis - Cryptophyceae
- ordo Ctenostomatida - Gymnolaemata
- ordo Cuculiformes - Aves
- ordo Cucurbitales - Magnoliopsida
- ordo Cumacea - Malacostraca
- ordo Cyanidiales - Cyanidiophyceae
- ordo Cyanidiales - Cyanidiophyceae
- ordo Cyatheales - Polypodiopsida
- ordo Cycadales - Cycadopsida
- ordo Cycloneritida - Gastropoda
- ordo Cyclophorales - Bacillariophyceae
- ordo Cyclophyllidea - Cestoda
- ordo Cyclopoida - Hexanauplia
- ordo Cyclorhagida - Kinorhyncha
- ordo Cyclostomatida - Stenolaemata
- ordo Cyclotrichiida - Litostomatea
- ordo Cydippida - Tentaculata
- ordo Cymatosirales - Mediophyceae
- ordo Cymbellales - Bacillariophyceae
- ordo Cyphobasidiales - Cystobasidiomycetes
- ordo Cypriniformes - Actinopterygii
- ordo Cyprinodontiformes - Actinopterygii
- ordo Cystobasidiales - Cystobasidiomycetes
- ordo Cystofilobasidiales - Tremellomycetes
- ordo Cytophagales - Cytophagia
- ordo Cyttariales - Leotiomycetes
D
- ordo Dacrymycetales - Dacrymycetes
- ordo Dactylogyridea - Monogenea
- ordo Dasycladales - Ulvophyceae
- ordo Dasyuromorphia - Mammalia
- ordo Decapoda - Malacostraca
- ordo Decastavida - Stavomonadea
- ordo Deferribacterales - Deferribacteres
- ordo Deinococcales - Deinococci
- ordo Delonicicolales - Sordariomycetes
- ordo Dendroceratida - Demospongiae
- ordo Dendrochirotida - Holothuroidea
- ordo Dendrogastrida - Maxillopoda
- ordo Dentaliida - Scaphopoda
- ordo Dermaptera - Insecta
- ordo Dermoptera - Mammalia
- ordo Desmacellida - Demospongiae
- ordo Desmarestiales - Phaeophyceae
- ordo Desmidiales - Zygnematophyceae
- ordo Desmodorida - Adenophorea
- ordo Desmomastigales - Dinophyceae
- ordo Desmoscolecida - Adenophorea
- ordo Desulfarculales - Deltaproteobacteria
- ordo Desulfobacterales - Deltaproteobacteria
- ordo Desulfovibrionales - Deltaproteobacteria
- ordo Desulfurellales - Deltaproteobacteria
- ordo Desulfurococcales - Thermoprotei
- ordo Desulfuromonadales - Deltaproteobacteria
- ordo Developayellida - Bigyromonadea
- ordo Diadematoida - Echinoidea
- ordo Diaporthales - Sordariomycetes
- ordo Diclybothriidea - Monogenea
- ordo Dictyoceratida - Demospongiae
- ordo Dictyochales - Dictyochophyceae
- ordo Dictyochophyceae incertae sedis - Dictyochophyceae
- ordo Dictyoglomales - Dictyoglomia
- ordo Dictyoneidales - Bacillariophyceae
- ordo Dictyotales - Phaeophyceae
- ordo Didelphimorphia - Mammalia
- ordo Dilleniales - Magnoliopsida
- ordo Dimargaritales - Zygomycota
- ordo Dinamoebidiales - Dinophyceae
- ordo Dinophyceae ordo incertae sedis - Dinophyceae
- ordo Dinophysales - Dinophyceae
- ordo Dioscoreales - Liliopsida
- ordo Diphyllidea - Cestoda
- ordo Diphyllobothriidea - Cestoda
- ordo Diplogasterida - Secernentea
- ordo Diplonemida - Diplonemea
- ordo Diplostomida - Trematoda
- ordo Diplostraca - Branchiopoda
- ordo Diplura - Entognatha
- ordo Diprotodontia - Mammalia
- ordo Dipsacales - Magnoliopsida
- ordo Diptera - Insecta
- ordo Discosporangiales - Phaeophyceae
- ordo Distomatida - Trepomonadea
- ordo Diversisporales - Glomeromycetes
- ordo Dixoniellales - Rhodellophyceae
- ordo Doassansiales - Exobasidiomycetes
- ordo Dolichomastigales - Mamiellophyceae
- ordo Dolichomicrostomida - Platyhelminthes
- ordo Doliolida - Thaliacea
- ordo Dorylaimida - Adenophorea
- ordo Dothideales - Dothideomycetes
- ordo Dyfrolomycetales - Dothideomycetes
E
- ordo Ebriida - Thecofilosea
- ordo Echiniscoidea - Heterotardigrada
- ordo Echinolampadoida - Echinoidea
- ordo Echinoneoida - Echinoidea
- ordo Echinorhynchida - Palaeacanthocephala
- ordo Echinothurioida - Echinoidea
- ordo Echiuroidea - Polychaeta
- ordo Ectocarpales - Phaeophyceae
- ordo Eiffellithales - Coccolithophyceae
- ordo Elasipodida - Holothuroidea
- ordo Ellobiida - Gastropoda
- ordo Ellobiopsida - Ellobiopsea (Ellobiophyceae)
- ordo Elopiformes - Actinopterygii
- ordo Elusimicrobiales - Elusimicrobia
- ordo Embioptera - Insecta
- ordo Enchytraeida - Clitellata
- ordo Endogonales - Zygomycota
- ordo Enoplida - Adenophorea
- ordo Enterobacteriales - Gammaproteobacteria
- ordo Entomophthorales - Entomophthoromycetes
- ordo Entomoplasmatales - Tenericutes
- ordo Entorrhizales - Entorrhizomycetes
- ordo Entosiphonida - Entosiphonea
- ordo Entwisleiales - Florideophyceae
- ordo Entylomatales - Exobasidiomycetes
- ordo Ephedrales - Gnetopsida
- ordo Ephemeroptera - Insecta
- ordo Equisetales - Polypodiopsida
- ordo Eremithallales - Lichinomycetes
- ordo Ericales - Magnoliopsida
- ordo Erinaceomorpha - Mammalia
- ordo Erysipelotrichales - Erysipelotrichia
- ordo Erysiphales - Leotiomycetes
- ordo Erythrobasidiales - Cystobasidiomycetes
- ordo Erythropeltales - Compsopogonophyceae
- ordo Erythropeltales - Compsopogonophyceae
- ordo Escalloniales - Magnoliopsida
- ordo Esociformes - Actinopterygii
- ordo Ethmodiscales - Coscinodiscophyceae
- ordo Euglenida - Euglenophyceae
- ordo Euglenophyceae incertae sedis - Euglenophyceae
- ordo Euhirudinea - Clitellata
- ordo Eukaryota unassigned order - Eukaryota unassigned classis
- ordo Eunicida - Polychaeta
- ordo Eunotiales - Bacillariophyceae
- ordo Euphausiacea - Malacostraca
- ordo Eupodiscales - Mediophyceae
- ordo Eurotiales - Eurotiomycetes
- ordo Euryalida - Ophiuroidea
- ordo Eurypygiformes - Aves
- ordo Eustigmatales - Eustigmatophyceae
- ordo Eustigmatophyceae ordo incertae sedis - Eustigmatophyceae
- ordo Eutreptiiida - Euglenophyceae
- ordo Euzebyales - Actinobacteria
- ordo Exobasidiales - Exobasidiomycetes
F
- ordo Fabales - Magnoliopsida
- ordo Fagales - Magnoliopsida
- ordo Falcocladiales - Sordariomycetes
- ordo Falconiformes - Aves
- ordo Fecampiida - Platyhelminthes
- ordo Fervidicoccales - Thermoprotei
- ordo Fibrobacterales - Fibrobacteria
- ordo Filobasidiales - Tremellomycetes
- ordo Filospermoidea - Gnathostomulida
- ordo Flavobacteriales - Flavobacteriia
- ordo Florenciellales - Dictyochophyceae
- ordo Florideophyceae incertae sedis - Florideophyceae
- ordo Flosculariaceae - Eurotatoria
- ordo Forcipulatida - Asteroidea
- ordo Fragilariales - Bacillariophyceae
- ordo Fragilariophycidae ordo incertae sedis - Bacillariophyceae
- ordo Fucales - Phaeophyceae
- ordo Fuscosporellales - Sordariomycetes
- ordo Fusobacteriales - Fusobacteriia
G
- ordo Gadiformes - Actinopterygii
- ordo Gadilida - Scaphopoda
- ordo Gaiellales - Actinobacteria
- ordo Galeommatida - Bivalvia
- ordo Galliformes - Aves
- ordo Ganeshida - Tentaculata
- ordo Garryales - Magnoliopsida
- ordo Gasterosteiformes - Actinopterygii
- ordo Gastrochaenida - Bivalvia
- ordo Gaviiformes - Aves
- ordo Geastrales - Agaricomycetes
- ordo Gelidiales - Florideophyceae
- ordo Gelyelloida - Hexanauplia
- ordo Geminibasidiales - Geminibasidiomycetes
- ordo Gemmatimonadales - Gemmatimonadetes
- ordo Gentianales - Magnoliopsida
- ordo Geoglossales - Geoglossomycetes
- ordo Geophilomorpha - Chilopoda
- ordo Georgefischeriales - Exobasidiomycetes
- ordo Geraniales - Magnoliopsida
- ordo Gigantorhynchida - Archiacanthocephala
- ordo Gigartinales - Florideophyceae
- ordo Ginkgoales - Ginkgoopsida
- ordo Gladiales - Coscinodiscophyceae
- ordo Glaucocystales - Glaucophyceae
- ordo Glaucosphaerales - Rhodellophyceae
- ordo Gleicheniales - Polypodiopsida
- ordo Gloeochaetales - Glaucophyceae
- ordo Gloeodiniales - Dinophyceae
- ordo Gloeophyllales - Agaricomycetes
- ordo Glomerales - Glomeromycetes
- ordo Glomerellales - Sordariomycetes
- ordo Glomerida - Diplopoda
- ordo Glomeridesmida - Diplopoda
- ordo Gnetales - Gnetopsida
- ordo Gnosonesimida - Platyhelminthes
- ordo Gobiesociformes - Actinopterygii
- ordo Golfingiiformes - Sipunculidea
- ordo Gomphales - Agaricomycetes
- ordo Goniochloridales - Eustigmatophyceae
- ordo Goniotrichales - Bangiophyceae
- ordo Gonorynchiformes - Actinopterygii
- ordo Gonyaulacales - Dinophyceae
- ordo Gordioidea - Gordioida
- ordo Gracilariales - Florideophyceae
- ordo Gromochytriales - Chytridiomycetes
- ordo Gruiformes - Aves
- ordo Grylloblattodea - Insecta
- ordo Gunnerales - Magnoliopsida
- ordo Gymnodiniales - Dinophyceae
- ordo Gymnophiona - Amphibia
- ordo Gymnotiformes - Actinopterygii
- ordo Gyracanthocephala - Eoacanthocephala
- ordo Gyrocotylidea - Cestoda
- ordo Gyrodactylidea - Monogenea
H
- ordo Halanaerobiales - Clostridia
- ordo Halicryptomorpha - Priapulida
- ordo Halobacteriales - Halobacteria
- ordo Halocyprida - Ostracoda
- ordo Haloplasmatales - Tenericutes
- ordo Halosphaeriales - Sordariomycetes
- ordo Halymeniales - Florideophyceae
- ordo Hapalidiales - Florideophyceae
- ordo Haplobothriidea - Cestoda
- ordo Haplosclerida - Demospongiae
- ordo Haplotaxida - Clitellata
- ordo Haplozoonales - Dinophyceae
- ordo Haptorida - Litostomatea
- ordo Harpacticoida - Hexanauplia
- ordo Harpellales - Zygomycota
- ordo Helicobasidiales - Pucciniomycetes
- ordo Heliolitina - Anthozoa
- ordo Helioporacea - Anthozoa
- ordo Helotiales - Leotiomycetes
- ordo Hemiaulales - Mediophyceae
- ordo Hemiptera - Insecta
- ordo Herpetosiphonales - Chloroflexia
- ordo Heteramorphida - Palaeacanthocephala
- ordo Heterodontiformes - Elasmobranchii
- ordo Heterogastridiales - Microbotryomycetes
- ordo Heterogloeales - Synurophyceae
- ordo Heteronemertea - Pilidiophora
- ordo Heterostavida - Stavomonadea
- ordo Hexamerocerata - Pauropoda
- ordo Hexanchiformes - Elasmobranchii
- ordo Hibberdiales - Chrysophyceae
- ordo Hildenbrandiales - Florideophyceae
- ordo Holasteroida - Echinoidea
- ordo Holophagales - Holophagae
- ordo Holothuriida - Holothuroidea
- ordo Holothyrida - Arachnida
- ordo Holtermanniales - Tremellomycetes
- ordo Homalorhagida - Kinorhyncha
- ordo Homosclerophorida - Homoscleromorpha
- ordo Honigbergiellida - Trichomonadea (Trichomonadophyceae)
- ordo Huerteales - Magnoliopsida
- ordo Hydrogenophilales - Betaproteobacteria
- ordo Hydrurales - Chrysophyceae
- ordo Hymenochaetales - Agaricomycetes
- ordo Hymenophyllales - Polypodiopsida
- ordo Hymenoptera - Insecta
- ordo Hypocreales - Sordariomycetes
- ordo Hyracoidea - Mammalia
- ordo Hysterangiales - Agaricomycetes
- ordo Hysteriales - Dothideomycetes
I
- ordo Icacinales - Magnoliopsida
- ordo Ignatiales - Ulvophyceae
- ordo Ignavibacteriales - Ignavibacteria
- ordo Inkyuleeales - Florideophyceae
- ordo Ishigeales - Phaeophyceae
- ordo Isochrysidales - Coccolithophyceae
- ordo Isocrinida - Crinoidea
- ordo Isoetales - Lycopodiopsida
- ordo Isopoda - Malacostraca
- ordo Ixodida - Arachnida
J
- ordo Jaapiales - Agaricomycetes
- ordo Jahnulales - Dothideomycetes
- ordo Jakobida - Jakobea
- ordo Jobellisiales - Sordariomycetes
- ordo Julida - Diplopoda
K
- ordo Katablephariales - Katablepharidophyceae
- ordo Kentrogonida - Maxillopoda
- ordo Kickxellales - Zoopagomycetes
- ordo Kiloniellales - Alphaproteobacteria
- ordo Klebsormidiales - Klebsormidiophyceae
- ordo Koralionastetales - Sordariomycetes
- ordo Kordiimonadales - Alphaproteobacteria
- ordo Kriegeriales - Microbotryomycetes
- ordo Ktedonobacterales - Ktedonobacteria
L
- ordo Laboulbeniales - Laboulbeniomycetes
- ordo Labyrinthulida - Labyrinthulea
- ordo Lactobacillales - Bacilli
- ordo Lagomorpha - Mammalia
- ordo Lahmiales - Ascomycota
- ordo Lamiales - Magnoliopsida
- ordo Laminariales - Phaeophyceae
- ordo Lamniformes - Elasmobranchii
- ordo Lampriformes - Actinopterygii
- ordo Laurales - Magnoliopsida
- ordo Laurida - Maxillopoda
- ordo Lecanicephalidea - Cestoda
- ordo Lecanorales - Lecanoromycetes
- ordo Legionellales - Gammaproteobacteria
- ordo Lentisphaerales - Lentisphaeria
- ordo Leotiales - Leotiomycetes
- ordo Lepetellida - Gastropoda
- ordo Lepidopleurida - Polyplacophora
- ordo Lepidoptera - Insecta
- ordo Lepidosireniformes - Sarcopterygii
- ordo Lepidostromatales - Agaricomycetes
- ordo Lepisosteiformes - Actinopterygii
- ordo Leptosomiformes - Aves
- ordo Leptostraca - Malacostraca
- ordo Leptothecata - Hydrozoa
- ordo Leucodictyida - Granofilosea
- ordo Leucosolenida - Calcarea
- ordo Leucosporidiales - Microbotryomycetes
- ordo Lichenoconiales - Dothideomycetes
- ordo Lichenotheliales - Dothideomycetes
- ordo Lichinales - Lichinomycetes
- ordo Licmophorales - Bacillariophyceae
- ordo Liliales - Liliopsida
- ordo Limida - Bivalvia
- ordo Limnognathida - Micrognathozoa
- ordo Limnomedusae - Hydrozoa
- ordo Lingulida - Lingulata
- ordo Lithobiomorpha - Chilopoda
- ordo Lithodesmiales - Mediophyceae
- ordo Lithonida - Calcarea
- ordo Litobothriidea - Cestoda
- ordo Littorinimorpha - Gastropoda
- ordo Lobata - Tentaculata
- ordo Lobulomycetales - Chytridiomycetes
- ordo Lophiiformes - Actinopterygii
- ordo Lophogastrida - Malacostraca
- ordo Lucinida - Bivalvia
- ordo Lulworthiales - Sordariomycetes
- ordo Lumbriculida - Clitellata
- ordo Lychniscosida - Hexactinellida
- ordo Lycopodiales - Lycopodiopsida
- ordo Lyrellales - Bacillariophyceae
- ordo Lyssacinosida - Hexactinellida
M
- ordo Macrodasyida - Gastrotricha
- ordo Macroscelidea - Mammalia
- ordo Macrostomorpha - Platyhelminthes
- ordo Magnaporthales - Sordariomycetes
- ordo Magnoliales - Magnoliopsida
- ordo Malasseziales - Malasseziomycetes
- ordo Malpighiales - Magnoliopsida
- ordo Malvales - Magnoliopsida
- ordo Mamiellales - Mamiellophyceae
- ordo Mantodea - Insecta
- ordo Mantophasmatodea - Insecta
- ordo Marattiales - Polypodiopsida
- ordo Mariprofundales - Zetaproteobacteria
- ordo Marsupiomonadales - Pedinophyceae
- ordo Mastigamoebida - Archamoebea
- ordo Mastogloiales - Bacillariophyceae
- ordo Mazocraeidea - Monogenea
- ordo Mecoptera - Insecta
- ordo Medeolariales - Ascomycota
- ordo Megaloptera - Insecta
- ordo Meiopriapulomorpha - Priapulida
- ordo Melanosporales - Sordariomycetes
- ordo Meliolales - Sordariomycetes
- ordo Melosirales - Coscinodiscophyceae
- ordo Merliida - Demospongiae
- ordo Mermithida - Adenophorea
- ordo Mesitornithiformes - Aves
- ordo Mesostigmata - Arachnida
- ordo Mesostigmatales - Mesostigmatophyceae
- ordo Methanobacteriales - Methanobacteria
- ordo Methanocellales - Methanomicrobia
- ordo Methanococcales - Methanococci
- ordo Methanomicrobiales - Methanomicrobia
- ordo Methanopyrales - Methanopyri
- ordo Methanosarcinales - Methanomicrobia
- ordo Methylococcales - Gammaproteobacteria
- ordo Methylophilales - Betaproteobacteria
- ordo Metteniusales - Magnoliopsida
- ordo Microascales - Sordariomycetes
- ordo Microbiotheria - Mammalia
- ordo Microbotryales - Microbotryomycetes
- ordo Micropygoida - Echinoidea
- ordo Microstromatales - Exobasidiomycetes
- ordo Microthamniales - Trebouxiophyceae
- ordo Microthyriales - Dothideomycetes
- ordo Millericrinida - Crinoidea
- ordo Ministeriida - Filasterea
- ordo Minutisphaerales - Dothideomycetes
- ordo Mischococcales - Xanthophyceae
- ordo Misophrioida - Hexanauplia
- ordo Mixiales - Mixiomycetes
- ordo Molpadida - Holothuroidea
- ordo Monhysterida - Adenophorea
- ordo Moniliellales - Tremellomycetes
- ordo Moniliformida - Archiacanthocephala
- ordo Monoblepharidales - Monoblepharidomycetes
- ordo Monocotylidea - Monogenea
- ordo Monomastigales - Mamiellophyceae
- ordo Mononchida - Adenophorea
- ordo Monostilifera - Hoplonemertea
- ordo Monotremata - Mammalia
- ordo Monstrilloida - Hexanauplia
- ordo Montchadskyellidea - Monogenea
- ordo Mormonilloida - Hexanauplia
- ordo Mortierellales - Mortierellomycetes
- ordo Mucorales - Mucoromycetes
- ordo Mugiliformes - Actinopterygii
- ordo Multivalvulida - Myxozoa
- ordo Murrayonida - Calcarea
- ordo Musophagiformes - Aves
- ordo Muyocopronales - Dothideomycetes
- ordo Mycocaliciales - Eurotiomycetes
- ordo Mycoplasmatales - Tenericutes
- ordo Mycosphaerellales - Dothideomycetes
- ordo Myctophiformes - Actinopterygii
- ordo Myida - Bivalvia
- ordo Myliobatiformes - Elasmobranchii
- ordo Myodocopida - Ostracoda
- ordo Myopsida - Cephalopoda
- ordo Myriangiales - Dothideomycetes
- ordo Myrmecridiales - Sordariomycetes
- ordo Myrtales - Magnoliopsida
- ordo Mysida - Malacostraca
- ordo Mystacocaridida - Maxillopoda (?)
- ordo Mytilida - Bivalvia
- ordo Mytilinidiales - Dothideomycetes
- ordo Myxiniformes - Myxini
- ordo Myxococcales - Deltaproteobacteria
N
- ordo Nanaloricida - Loricifera
- ordo Naohideales - Cystobasidiomycetes
- ordo Narcomedusae - Hydrozoa
- ordo Natipusillales - Dothideomycetes
- ordo Natomonadida - Peranemea
- ordo Natranaerobiales - Clostridia
- ordo Nautiliales - Epsilonproteobacteria
- ordo Nautilida - Cephalopoda
- ordo Naviculales - Bacillariophyceae
- ordo Nectiopoda - Remipedia
- ordo Nectonematoidea - Nectonematoida
- ordo Neisseriales - Betaproteobacteria
- ordo Nemaliales - Florideophyceae
- ordo Nemastomatales - Florideophyceae
- ordo Nemertodermatida - Xenacoelomorpha
- ordo Nemodermatales - Phaeophyceae
- ordo Neocallimastigales - Neocallimastigomycetes
- ordo Neoechinorhynchida - Eoacanthocephala
- ordo Neogastropoda - Gastropoda
- ordo Neolectales - Neolectomycetes
- ordo Neomeniamorpha - Solenogastres
- ordo Nepenthales - Magnoliopsida
- ordo Nephridiophagales - Chytridiomycetes
- ordo Nephroselmidales - Nephroselmidophyceae
- ordo Neuroptera - Insecta
- ordo Nippotaeniidea - Cestoda
- ordo Nitriliruptorales - Actinobacteria
- ordo Nitrosomonadales - Betaproteobacteria
- ordo Nitrospirales - Nitrospira
- ordo Noctilucales - Noctilucophyceae
- ordo Nostocales - Cyanophyceae
- ordo Notacanthiformes - Actinopterygii
- ordo Notomyotida - Asteroidea
- ordo Notoryctemorphia - Mammalia
- ordo Notostraca - Branchiopoda
- ordo Nucleariida - Cristidiscoidia
- ordo Nuculanida - Bivalvia
- ordo Nuculida - Bivalvia
- ordo Nudibranchia - Gastropoda
- ordo Nymphaeales - Magnoliopsida
O
- ordo Oceanospirillales - Gammaproteobacteria
- ordo Ochromonadales - Synurophyceae
- ordo Octopoda - Cephalopoda
- ordo Odonata - Insecta
- ordo Oedogoniales - Chlorophyceae
- ordo Oegopsida - Cephalopoda
- ordo Oligacanthorhynchida - Archiacanthocephala
- ordo Oligotrichida - Ciliatea
- ordo Olpidiales - Chytridiomycetes
- ordo Oltmannsiellopsidales - Ulvophyceae
- ordo Onchoproteocephalidea - Cestoda
- ordo Onslowiales - Phaeophyceae
- ordo Onygenales - Eurotiomycetes
- ordo Ophiacanthida - Ophiuroidea
- ordo Ophidiiformes - Actinopterygii
- ordo Ophioglossales - Polypodiopsida
- ordo Ophioleucida - Ophiuroidea
- ordo Ophioscolecida - Ophiuroidea
- ordo Ophiostomatales - Sordariomycetes
- ordo Ophiurida - Ophiuroidea
- ordo Opilioacarida - Arachnida
- ordo Opiliones - Arachnida
- ordo Opisthocomiformes - Aves
- ordo Opisthopora - Clitellata
- ordo Opitutales - Opitutae
- ordo Orbiliales - Orbiliomycetes
- ordo Orectolobiformes - Elasmobranchii
- ordo Orthoptera - Insecta
- ordo Osmeriformes - Actinopterygii
- ordo Osmundales - Polypodiopsida
- ordo Osteoglossiformes - Actinopterygii
- ordo Ostreida - Bivalvia
- ordo Ostropales - Lecanoromycetes
- ordo Otidiformes - Aves
- ordo Oxalidales - Magnoliopsida
- ordo Oxyrrhinales - Oxyrrhidophyceae (Oxyrrhida)
- ordo Oxyurida - Secernentea
P
- ordo Pachnocybales - Pucciniomycetes
- ordo Palmariales - Florideophyceae
- ordo Palmophyllales - Palmophyllophyceae
- ordo Palpigradi - Arachnida
- ordo Pandanales - Liliopsida
- ordo Pantopoda - Pycnogonida
- ordo Parachela - Eutardigrada
- ordo Paracryphiales - Magnoliopsida
- ordo Paradiplococciales - Sordariomycetes
- ordo Paraglomerales - Glomeromycetes
- ordo Paraliales - Coscinodiscophyceae
- ordo Paraphysomonadales - Chrysophyceae
- ordo Parmales - Bolidophyceae
- ordo Parvularculales - Alphaproteobacteria
- ordo Passeriformes - Aves
- ordo Pasteurellales - Gammaproteobacteria
- ordo Patellariales - Dothideomycetes
- ordo Paucituberculata - Mammalia
- ordo Paxillosida - Asteroidea
- ordo Pectinida - Bivalvia
- ordo Pedinellales - Dictyochophyceae
- ordo Pedinoida - Echinoidea
- ordo Pedinomonadales - Pedinophyceae
- ordo Pedunculata - Maxillopoda
- ordo Pelagomonadales - Pelagophyceae
- ordo Pelecaniformes - Aves
- ordo Peltigerales - Lecanoromycetes
- ordo Penicillaria - Anthozoa
- ordo Pennatulacea - Anthozoa
- ordo Peramelemorphia - Mammalia
- ordo Peranemida - Peranemea
- ordo Perciformes - Actinopterygii
- ordo Percopsiformes - Actinopterygii
- ordo Peridiniales - Dinophyceae
- ordo Peripodida - Asteroidea
- ordo Perissodactyla - Mammalia
- ordo Perkinsida - Perkinsea
- ordo Persiculida - Holothuroidea
- ordo Pertusariales - Lecanoromycetes
- ordo Petalomonadida - Stavomonadea
- ordo Petromyzontiformes - Cephalaspidomorphi
- ordo Petrosaviales - Liliopsida
- ordo Peyssonneliales - Florideophyceae
- ordo Pezizales - Pezizomycetes
- ordo Phaeocystales - Coccolithophyceae
- ordo Phaeomoniellales - Eurotiomycetes
- ordo Phaeophyceae ordo incertae sedis - Phaeophyceae
- ordo Phaeosiphoniellales - Phaeophyceae
- ordo Phaeothamniales - Phaeothamniophyceae
- ordo Phaeotrichales - Dothideomycetes
- ordo Phaethontiformes - Aves
- ordo Phallales - Agaricomycetes
- ordo Phascolosomatiformes - Phascolosomatidea
- ordo Phasmida - Insecta
- ordo Phlebobranchia - Ascidiacea
- ordo Phoenicopteriformes - Aves
- ordo Pholidoskepia - Solenogastres
- ordo Pholidota - Mammalia
- ordo Phomatosporales - Sordariomycetes
- ordo Phragmophora - Sagittoidea
- ordo Phyllachorales - Sordariomycetes
- ordo Phyllobothriidea - Cestoda
- ordo Phyllodocida - Polychaeta
- ordo Phyllosiphonales - Trebouxiophyceae
- ordo Phytodiniales - Dinophyceae
- ordo Piciformes - Aves
- ordo Picocystales - Picocystophyceae
- ordo Picomonadida - Picomonadea
- ordo Picophagales - Picophagophyceae
- ordo Picramniales - Magnoliopsida
- ordo Pihiellales - Florideophyceae
- ordo Pilosa - Mammalia
- ordo Pinales - Pinopsida
- ordo Pinguiochrysidales - Pinguiophyceae
- ordo Piperales - Magnoliopsida
- ordo Pisorisporiales - Sordariomycetes
- ordo Placidida - Placididea
- ordo Plagiogrammales - Bacillariophyceae
- ordo Plagiorchiida - Trematoda
- ordo Planctomycetales - Planctomycetacia
- ordo Platycopina - Ostracoda
- ordo Platycopioida - Hexanauplia
- ordo Platyctenida - Tentaculata
- ordo Platydesmida - Diplopoda
- ordo Platygloeales - Pucciniomycetes
- ordo Plecoptera - Insecta
- ordo Pleosporales - Dothideomycetes
- ordo Pleurobranchida - Gastropoda
- ordo Pleurocapsales - Cyanophyceae
- ordo Pleuronectiformes - Actinopterygii
- ordo Pleuronematida - Oligohymenophorea
- ordo Pleurotheciales - Sordariomycetes
- ordo Pleurotomariida - Gastropoda
- ordo Plocamiales - Florideophyceae
- ordo Ploeotiida - Ploeotarea
- ordo Ploima - Eurotatoria
- ordo Plumatellida - Phylactolaemata
- ordo Pneumocystales - Pneumocystomycetes
- ordo Poales - Liliopsida
- ordo Podicipediformes - Aves
- ordo Podocopida - Ostracoda
- ordo Podorhabdales - Coccolithophyceae
- ordo Poecilosclerida - Demospongiae
- ordo Polyacanthorhynchida - Polyacanthocephala
- ordo Polycladida - Platyhelminthes
- ordo Polydesmida - Diplopoda
- ordo Polymastiida - Demospongiae
- ordo Polymixiiformes - Actinopterygii
- ordo Polymorphida - Palaeacanthocephala
- ordo Polypodiales - Polypodiopsida
- ordo Polyporales - Agaricomycetes
- ordo Polypteriformes - Actinopterygii
- ordo Polystilifera - Hoplonemertea
- ordo Polystomatidea - Monogenea
- ordo Polyxenida - Diplopoda
- ordo Polyzoniida - Diplopoda
- ordo Porocephalida - Maxillopoda
- Ordo Porphyrales - Bangiophyceae
- ordo Porphyridiales - Porphyridiophyceae
- ordo Postgaardida - Postgaardea
- ordo Prasinococcales - Palmophyllophyceae
- ordo Prasiolales - Trebouxiophyceae
- ordo Priapulomorpha - Priapulida
- ordo Primates - Mammalia
- ordo Pristiophoriformes - Elasmobranchii
- ordo Proboscidea - Mammalia
- ordo Procellariiformes - Aves
- ordo Prokinetoplastida - Kinetoplastea
- ordo Prolecithophora - Platyhelminthes
- ordo Prorhynchida - Platyhelminthes
- ordo Prorocentrales - Dinophyceae
- ordo Prorodontida - Prostomatea
- ordo Proseriata - Platyhelminthes
- ordo Prostigmata - Arachnida
- ordo Proteales - Magnoliopsida
- ordo Protoraphidales - Bacillariophyceae
- ordo Protozoa ordo incertae sedis - Protozoa classis incertae sedis
- ordo Protura - Entognatha
- ordo Prymnesiales - Coccolithophyceae
- ordo Pseudomonadales - Gammaproteobacteria
- ordo Pseudoscorpiones - Arachnida
- ordo Pseudoscourfieldiales - Pyramimonadophyceae
- ordo Psilotales - Polypodiopsida
- ordo Psittaciformes - Aves
- ordo Psocodea - Insecta
- ordo Pteroclidiformes - Aves
- ordo Pteropoda - Gastropoda
- ordo Pucciniales - Pucciniomycetes
- ordo Puniceicoccales - Opitutae
- ordo Pygophora - Maxillopoda
- ordo Pyramimonadales - Pyramimonadophyceae
- ordo Pyrenomonadales - Cryptophyceae
- ordo Pyrenulales - Eurotiomycetes
- ordo Pyrocystales - Dinophyceae
- ordo Pyrosomatida - Thaliacea
- ordo Pyxidiophorales - Laboulbeniomycetes
R
- ordo Rajiformes - Elasmobranchii
- ordo Ralfsiales - Phaeophyceae
- ordo Ranunculales - Magnoliopsida
- ordo Rapazida - Euglenophyceae
- ordo Raphidioptera - Insecta
- ordo Raphidophyceae incertae sedis - Raphidophyceae
- ordo Rhabditida - Secernentea
- ordo Rhabdocoela - Platyhelminthes
- ordo Rhabdonematales - Bacillariophyceae
- ordo Rhabdopleurida - Pterobranchia
- ordo Rhaphoneidales - Bacillariophyceae
- ordo Rheiformes - Aves
- ordo Rhinebothriidea - Cestoda
- ordo Rhinopristiformes - Elasmobranchii
- ordo Rhizobiales - Alphaproteobacteria
- ordo Rhizochloridales - Xanthophyceae
- ordo Rhizochromulinales - Dictyochophyceae
- ordo Rhizochrysidales - Chrysophyceae
- ordo Rhizophlyctidales - Chytridiomycetes
- ordo Rhizophydiales - Chytridiomycetes
- ordo Rhizosoleniales - Coscinodiscophyceae
- ordo Rhizostomeae - Scyphozoa
- ordo Rhodachlyales - Florideophyceae
- ordo Rhodellales - Rhodellophyceae
- ordo Rhodobacterales - Alphaproteobacteria
- ordo Rhodochaetales - Compsopogonophyceae
- ordo Rhodochaetales - Compsopogonophyceae
- ordo Rhodocyclales - Betaproteobacteria
- ordo Rhodogorgonales - Florideophyceae
- ordo Rhodophyta ordo incertae sedis - Rhodophyta classis incertae sedis
- ordo Rhodospirillales - Alphaproteobacteria
- ordo Rhodymeniales - Florideophyceae
- ordo Rhopalodiales - Bacillariophyceae
- ordo Rhynchobdellida - Clitellata
- ordo Rhynchocephalia - Reptilia
- ordo Rhynchonellida - Rhynchonellata
- ordo Rhytismatales - Leotiomycetes
- ordo Ricinulei - Arachnida
- ordo Rickettsiales - Alphaproteobacteria
- ordo Robbauerales - Exobasidiomycetes
- ordo Rodentia - Mammalia
- ordo Rosales - Magnoliopsida
- ordo Rozellida - Cristidiscoidia
- ordo Rubrobacterales - Actinobacteria
- ordo Rufusiales - Stylonematophyceae
- ordo Runcinida - Gastropoda
- ordo Russulales - Agaricomycetes
S
- ordo Sabellida - Polychaeta
- ordo Saccharomycetales - Saccharomycetes
- ordo Saccopharyngiformes - Actinopterygii
- ordo Salenioida - Echinoidea
- ordo Salinisphaerales - Gammaproteobacteria
- ordo Salmoniformes - Actinopterygii
- ordo Salpida - Thaliacea
- ordo Salviniales - Polypodiopsida
- ordo Santalales - Magnoliopsida
- ordo Sapindales - Magnoliopsida
- ordo Sarcinochrysidales - Pelagophyceae
- ordo Sarcoptiformes - Arachnida
- ordo Savoryellales - Sordariomycetes
- ordo Saxifragales - Magnoliopsida
- ordo Scalpelliformes - Maxillopoda
- ordo Scandentia - Mammalia
- ordo Sceptrulophora - Hexactinellida
- ordo Schizaeales - Polypodiopsida
- ordo Schizocladiales - Schizocladiophyceae
- ordo Schizomida - Arachnida
- ordo Schizopyrenida - Heterolobosea
- ordo Schizosaccharomycetales - Schizosaccharomycetes
- ordo Scleractinia - Anthozoa
- ordo Scolopendromorpha - Chilopoda
- ordo Scopalinida - Demospongiae
- ordo Scorpaeniformes - Actinopterygii
- ordo Scorpiones - Arachnida
- ordo Scotinosphaerales - Ulvophyceae
- ordo Scourfieldiales - Pedinophyceae
- ordo Scutigeromorpha - Chilopoda
- ordo Scytothamnales - Phaeophyceae
- ordo Sebacinales - Agaricomycetes
- ordo Sebdeniales - Florideophyceae
- ordo Segregatospumellales - Chrysophyceae
- ordo Seguenziida - Gastropoda
- ordo Seisonacea - Pararotatoria
- ordo Selaginellales - Lycopodiopsida
- ordo Selenomonadales - Negativicutes
- ordo Semaeostomeae - Scyphozoa
- ordo Sepiida - Cephalopoda
- ordo Septobasidiales - Pucciniomycetes
- ordo Sessilia - Maxillopoda
- ordo Seticoronaria - Priapulida
- ordo Siluriformes - Actinopterygii
- ordo Siphonaptera - Insecta
- ordo Siphonariida - Gastropoda
- ordo Siphoniulida - Diplopoda
- ordo Siphonocryptida - Diplopoda
- ordo Siphonophorae - Hydrozoa
- ordo Siphonophorida - Diplopoda
- ordo Siphonostomatoida - Hexanauplia
- ordo Sipunculiformes - Sipunculidea
- ordo Sirenia - Mammalia
- ordo Sneathiellales - Alphaproteobacteria
- ordo Solanales - Magnoliopsida
- ordo Solemyida - Bivalvia
- ordo Solifugae - Arachnida
- ordo Solirubrobacterales - Actinobacteria
- ordo Sordariales - Sordariomycetes
- ordo Soricomorpha - Mammalia
- ordo Spatangoida - Echinoidea
- ordo Spathebothriidea - Cestoda
- ordo Sphacelariales - Phaeophyceae
- ordo Sphaeriida - Bivalvia
- ordo Sphaerobacterales - Thermomicrobia
- ordo Sphaerocladina - Demospongiae
- ordo Sphaeropleales - Chlorophyceae
- ordo Sphaerotheriida - Diplopoda
- ordo Sphenisciformes - Aves
- ordo Sphingobacteriales - Sphingobacteriia
- ordo Sphingomonadales - Alphaproteobacteria
- ordo Spiculogloeales - Agaricostilbomycetes
- ordo Spinulosida - Asteroidea
- ordo Spionida - Polychaeta
- ordo Spirobolida - Diplopoda
- ordo Spirochaetales - Spirochaetes
- ordo Spirogloeales - Zygnematophyceae
- ordo Spirostreptida - Diplopoda
- ordo Spirularia - Anthozoa
- ordo Spirulida - Cephalopoda
- ordo Spirurida - Secernentea
- ordo Spizellomycetales - Chytridiomycetes
- ordo Spongillida - Demospongiae
- ordo Spongomonadida - Imbricatea
- ordo Sporidiobolales - Microbotryomycetes
- ordo Sporochnales - Phaeophyceae
- ordo Sporolithales - Florideophyceae
- ordo Squaliformes - Elasmobranchii
- ordo Squamata - Reptilia
- ordo Squatiniformes - Elasmobranchii
- ordo Stauromedusae - Staurozoa
- ordo Stellarimales - Coscinodiscophyceae
- ordo Stemmiulida - Diplopoda
- ordo Stephanoberyciformes - Actinopterygii
- ordo Stephanodiscales - Mediophyceae
- ordo Stephanolithiales - Coccolithophyceae
- ordo Stephanopyxales - Coscinodiscophyceae
- ordo Stereopsidales - Agaricomycetes
- ordo Sterrofustia - Solenogastres
- ordo Stichocotylida - Trematoda
- ordo Stictodiscales - Coscinodiscophyceae
- ordo Stigmatodiscales - Dothideomycetes
- ordo Stigonematales - Cyanophyceae
- ordo Stolidobranchia - Ascidiacea
- ordo Stomatopoda - Malacostraca
- ordo Stomiiformes - Actinopterygii
- ordo Stomopneustoida - Echinoidea
- ordo Strepsiptera - Insecta
- ordo Striatellales - Bacillariophyceae
- ordo Strigiformes - Aves
- ordo Strigulales - Dothideomycetes
- ordo Strongylida - Secernentea
- ordo Struthioniformes - Aves
- ordo Stschapoviales - Phaeophyceae
- ordo Stylommatophora - Gastropoda
- ordo Stylonematales - Stylonematophyceae
- ordo Suberitida - Demospongiae
- ordo Suessiales - Dinophyceae
- ordo Sulfolobales - Thermoprotei
- ordo Suliformes - Aves
- ordo Superstratomycetales - Dothideomycetes
- ordo Surirellales - Bacillariophyceae
- ordo Symbiida - Eucycliophora
- ordo Synallactida - Holothuroidea
- ordo Synbranchiformes - Actinopterygii
- ordo Syndiniales - Syndiniophyceae (Syndinea)
- ordo Synergistales - Synergistia
- ordo Syngnathiformes - Actinopterygii
- ordo Syntrophobacterales - Deltaproteobacteria
- ordo Synurales - Synurophyceae
- ordo Syracosphaerales - Coccolithophyceae
- ordo Syringodermatales - Phaeophyceae
- ordo Systellommatophora - Gastropoda
T
- ordo Tabellariales - Bacillariophyceae
- ordo Talbotiomycetales - Entorrhizomycetes
- ordo Tanaidacea - Malacostraca
- ordo Taphrinales - Taphrinomycetes
- ordo Tectofilosida - Thecofilosea
- ordo Telonemia ordo ineditae - Telonemia classis ineditae
- ordo Teloschistales - Lecanoromycetes
- ordo Terebellida - Polychaeta
- ordo Terebratulida - Rhynchonellata
- ordo Testudines - Reptilia
- ordo Tethyida - Demospongiae
- ordo Tetrabothriidea - Cestoda
- ordo Tetractinellida - Demospongiae
- ordo Tetragonidiales - Cryptophyceae
- ordo Tetramerocerata - Pauropoda
- ordo Tetraodontiformes - Actinopterygii
- ordo Tetraphyllidea - Cestoda
- ordo Thalassionematales - Bacillariophyceae
- ordo Thalassiophysales - Bacillariophyceae
- ordo Thalassiosirales - Mediophyceae
- ordo Thalassocalycida - Tentaculata
- ordo Thallochrysidales - Chrysophyceae
- ordo Thaumatomonadida - Imbricatea
- ordo Thecideida - Rhynchonellata
- ordo Thelebolales - Leotiomycetes
- ordo Thelephorales - Agaricomycetes
- ordo Thermales - Deinococci
- ordo Thermoanaerobacterales - Clostridia
- ordo Thermococcales - Thermococci
- ordo Thermodesulfobacteriales - Thermodesulfobacteria
- ordo Thermogemmatisporales - Ktedonobacteria
- ordo Thermoleophilales - Actinobacteria
- ordo Thermolithobacterales - Thermolithobacteria
- ordo Thermomicrobiaes - Thermomicrobia
- ordo Thermoplasmatales - Thermoplasmata
- ordo Thermoproteales - Thermoprotei
- ordo Thermosbaenacea - Malacostraca
- ordo Thermotogales - Thermotogae
- ordo Thermozodia - Mesotardigrada
- ordo Thiotrichales - Gammaproteobacteria
- ordo Thoracosphaerales - Dinophyceae
- ordo Thoreales - Florideophyceae
- ordo Thysanoptera - Insecta
- ordo Tilletiales - Exobasidiomycetes
- ordo Tilopteridales - Phaeophyceae
- ordo Tinamiformes - Aves
- ordo Tintinnida - Spirotrichea
- ordo Tirisporellales - Dothideomycetes
- ordo Togniniales - Sordariomycetes
- ordo Torodiniales - Dinophyceae
- ordo Torpediniformes - Elasmobranchii
- ordo Torpedosporales - Sordariomycetes
- ordo Tovelliales - Dinophyceae
- ordo Toxariales - Mediophyceae
- ordo Trachycladida - Demospongiae
- ordo Trachymedusae - Hydrozoa
- ordo Trebouxiales - Trebouxiophyceae
- ordo Trebouxiophyceae ordo incertae sedis - Trebouxiophyceae
- ordo Trechisporales - Agaricomycetes
- ordo Tremellales - Tremellomycetes
- ordo Tremellodendropsidales - Agaricomycetes
- ordo Trentepohliales - Ulvophyceae
- ordo Triblidiales - Ascomycota
- ordo Tribonematales - Xanthophyceae
- ordo Triceratiales - Coscinodiscophyceae
- ordo Trichocephalida - Adenophorea
- ordo Trichomonadida - Trichomonadea (Trichomonadophyceae)
- ordo Trichoptera - Insecta
- ordo Trichosphaeriales - Sordariomycetes
- ordo Trichosporonales - Tremellomycetes
- ordo Tricladida - Platyhelminthes
- ordo Trigoniida - Bivalvia
- ordo Triplonchida - Adenophorea
- ordo Tritirachiales - Tritirachiomycetes
- ordo Tritrichomonadida - Trichomonadea (Trichomonadophyceae)
- ordo Trochida - Gastropoda
- ordo Trochodendrales - Magnoliopsida
- ordo Trogoniformes - Aves
- ordo Trombidiformes - Arachnida
- ordo Tryblidiida - Monoplacophora
- ordo Trypanorhyncha - Cestoda
- ordo Trypanosomatida - Kinetoplastea
- ordo Trypetheliales - Dothideomycetes
- ordo Tubeufiales - Dothideomycetes
- ordo Tubulidentata - Mammalia
- ordo Tylenchida - Secernentea
U
- ordo Uleiellales - Ustilaginomycetes
- ordo Ulotrichales - Ulvophyceae
- ordo Ulvales - Ulvophyceae
- ordo Ulvophyceae incertae sedis - Ulvophyceae
- ordo Umbelopsidales - Zygomycota
- ordo Umbilicariales - Lecanoromycetes
- ordo Umbraculida - Gastropoda
- ordo Unilacrymales - Dacrymycetes
- ordo Unionida - Bivalvia
- ordo Urneidophycidae - Bacillariophyceae
- ordo Urocystidales - Ustilaginomycetes
- ordo Uropygi - Arachnida
- ordo Ustilaginales - Ustilaginomycetes
V
- ordo Vahliales - Magnoliopsida
- ordo Valsariales - Dothideomycetes
- ordo Valvatida - Asteroidea
- ordo Vampyromorpha - Cephalopoda
- ordo Vaucheriales - Xanthophyceae
- ordo Velatida - Asteroidea
- ordo Venerida - Bivalvia
- ordo Venturiales - Dothideomycetes
- ordo Verongiida - Demospongiae
- ordo Verrucariales - Eurotiomycetes
- ordo Verrucomicrobiales - Verrucomicrobiae
- ordo Vibrionales - Gammaproteobacteria
- ordo Victivallales - Lentisphaeria
- ordo Violaceomycetales - Ustilaginomycetes
- ordo Vitales - Magnoliopsida
W
- ordo Wallemiales - Wallemiomycetes
- ordo Watznaueriales - Coccolithophyceae
- ordo Welwitschiales - Gnetopsida
X
- ordo Xanthomonadales - Gammaproteobacteria
- ordo Xanthophyceae incertae sedis - Xanthophyceae
- ordo Xenospadicoidales - Sordariomycetes
- ordo Xiphosurida - Merostomata
- ordo Xylariales - Sordariomycetes
- ordo Xylonales - Xylonomycetes
Z
- ordo Zeiformes - Actinopterygii
- ordo Zeloasperisporiales - Dothideomycetes
- ordo Zingiberales - Liliopsida
- ordo Zoantharia - Anthozoa
- ordo Zoopagales - Zoopagomycetes
- ordo Zoraptera - Insecta
- ordo Zosterogrammida - Diplopoda
- ordo Zygentoma - Insecta
- ordo Zygnematales - Zygnematophyceae
- ordo Zygodiscales - Coccolithophyceae
- ordo Zygophyllales - Magnoliopsida
†
- ordo †Acrotretida - Lingulata
- ordo †Agnostida - Trilobita
- ordo †Ammonoidea - Cephalopoda
- ordo †Arthrochirotida - Holothuroidea
- ordo †Asaphida - Trilobita
- ordo †Athyridida - Rhynchonellata
- ordo †Atrypida - Rhynchonellata
- ordo †Aulacopleurida - Trilobita
- ordo †Belemnitida - Cephalopoda
- ordo †Billingsellida - Strophomenata
- ordo †Bolosauria - Reptilia
- ordo †Caloneurodea - Insecta
- ordo †Chileida - Chileata
- ordo †Cnemidolestodea - Insecta
- ordo †Corynexochida - Trilobita
- ordo †Cryptostomida - Stenolaemata
- ordo †Cystoporida - Stenolaemata
- ordo †Diaphanopterodea - Insecta
- ordo †Dictyonellida - Chileata
- ordo †Dinosauria - Reptilia
- ordo †Eoblattida - Insecta
- ordo †Fenestrida - Stenolaemata
- ordo †Glosselytrodea - Insecta
- ordo †Harpetida - Trilobita
- ordo †Hippuritida - Bivalvia
- ordo †Holectypoida - Echinoidea
- ordo †Hyolithelminthes - Tommotiida
- ordo †Hypoperlida - Insecta
- ordo †Inarticulata - Brachiopoda
- ordo †Kutorginida - Kutorginata
- ordo †Lichida - Trilobita
- ordo †Megalodontida - Bivalvia
- ordo †Meganisoptera - Insecta
- ordo †Megasecoptera -Insecta
- ordo †Miomoptera - Insecta
- ordo †Mitrosagophora - Tommotiida
- ordo †Modiomorphida - Bivalvia
- ordo †Myalinida - Bivalvia
- ordo †Nectopantopoda - Pycnogonida
- ordo †Obolellida - Obolellata
- ordo †Odontopleurida - Trilobita
- ordo †Olenellida - Trilobita
- ordo †Orthida - Rhynchonellata
- ordo †Orthotetida - Strophomenata
- ordo †Palaeocopida - Ostracoda
- ordo †Palaeodictyoptera - Insecta
- ordo †Palaeoisopoda - Pycnogonida
- ordo †Palaeopantopoda - Pycnogonida
- ordo †Paoliida - Insecta
- ordo †Pareiasaurida - Reptilia
- ordo †Pentamerida - Rhynchonellata
- ordo †Phacopida - Trilobita
- ordo †Phymosomatoida - Echinoidea
- ordo †Productida - Strophomenata
- ordo †Proetida - Trilobita
- ordo †Proparia - Trilobita
- ordo †Protocoleoptera - Insecta
- ordo †Protorthida - Rhynchonellata
- ordo †Protorthoptera - Insecta
- ordo †Pterosauria - Reptilia
- ordo †Ptychopariida - Trilobita
- ordo †Reculoidea - Insecta
- ordo †Redlichiida - Trilobita
- ordo †Rhynchosauria - Reptilia
- ordo †Siphonotretida - Lingulata
- ordo †Spiriferida - Rhynchonellata
- ordo †Spiriferinida - Rhynchonellata
- ordo †Strophomenida - Strophomenata
- ordo †Thecodontia – Reptilia
- ordo †Titanoptera - Insecta
- ordo †Trepostomatida - Stenolaemata
- ordo †Vojnovskyales - Pinopsida
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