Aca
- Acamptodaphne
- Acanthais
Acanthina Fischer de Waldheim, 1807
- Acanthina katzi† Fleming 1972
- Acanthina monodon (Pallas, 1774)
- Acanthina obesa† DeVries 2003
- Acanthina rugosa† DeVries 2003
- Acanthina triangularis† DeVries 2003
- Acanthina unicornis (Bruguière, 1789)
- ?Acanthina muricata Broderip, 1832
- ?Acanthina brevidentata (Wood, 1828)
Mollusca → Gastropoda → Neogastropoda → Muricoidea → Muricidae → Ocenebrinae
-
Acanthina brevidentata
Acanthinucella Cooke, 1918
- Acanthinucella paucilirata (Stearns, 1871)
- Acanthinucella punctulata (Gray in G.B. Sowerby I, 1835)
- Acanthinucella spirata (Blainville, 1832)
Mollusca → Gastropoda → Neogastropoda → Muricoidea → Muricidae → Ocenebrinae
- Acanthocardia
†Porodica Acanthoceratidae
- †Acanthoceratinae de Groussouvre 1894
- †Euomphaloceratinae Cooper 1978
- †Mammitinae Hyatt 1900
- †Mantelliceratinae Hyatt 1903
- †Roemeroceras Hyatt 1903
Mollusca → Cephalopoda → Acanthoceratoidea → Ammonitina
†Potporodica Acanthoceratinae de Groussouvre 1894
- †Acanthoceras Neumayr 1875
- †Acompsoceras
- †Alzadites Kennedy and Cobban 1990
- †Benueites Reyment 1954
- †Calycoceras Hyatt 1900
- †Conlinoceras
- †Cunningtoniceras Collignon 1937
- †Eucalycoceras Spath 1923
- †Hypacanthohoplites Spath 1923
- †Kastanoceras Kennedy and Cobban 1990
- †Kennediella Cooper 1979
- †Microsulcatoceras Kennedy and Cobban 1990
- †Nebraskites
- †Neocardioceras
- †Nigericeras Schneegans 1943
- †Paraconlinoceras
- †Plesiacanthoceratoides Kennedy 1990
- †Prohauericeras
- †Protacanthoceras
- †Pseudocalycoceras
- †Pseudovascoceras Zaborski 1996
- †Quitmaniceras Powell 1963
- †Sumitomoceras Matsumoto 1969
- †Tarrantoceras
- †Thomelites
- †Tunesites
- †Watinoceras Warren 1930
Mollusca → Cephalopoda → Ammonitina → Acanthoceratoidea → Acanthoceratidae
†Natporodica Acanthoceratoidea de Grossouvre 1894
- †Acanthoceratidae Grossouvre 1894
- †Brancoceratidae Spath 1934
- †Coilopoceratidae Hyatt 1903
- †Collignoniceratidae Wright and Wright 1951
- †Flickiidae Adkins 1928
- †Forbesiceratidae Wright 1952
- †Leymeriellidae Breistroffer 1951
- †Lyelliceratidae Spath 1921
- †Peroniceratidae Hyatt 1900
- †Prolyelliceratidae Latil et al. 2009
- †Pseudotissotidae Hyatt 1903
- †Pseudotissotiidae Hyatt 1903
- †Sphenodiscidae Hyatt 1900
- †Tissotiidae Hyatt 1900
- †Vascoceratidae Douvillé 1912
Animalia → Mollusca → Cephalopoda → Ammonitida
- Acanthochitona
- Acanthochitonidae
- Acanthodaphne
- Acanthodoris
- Acanthomenia
- Acanthomeniidae
- Acanthopleura
- Acanthotrophon
- Acar
- Acavoidea
Ace
- Acella
Acesta H. & A. Adams, 1858
- Acesta agassizii (Dall, 1902)
- Acesta angolensis (Adam & Knudsen, 1955)
- Acesta borneensis (Bartsch, 1913)
- Acesta bullisi (H. E. Vokes, 1963)
- Acesta butonensis (Bartsch, 1913)
- Acesta celebensis (Bartsch, 1913)
- Acesta citrina Masahito & Habe, 1976
- Acesta colombiana (H. E. Vokes, 1970)
- Acesta cryptadelphe Gagnon, Kenchington, Port, Anstey & Murillo, 2015 [1]
- Acesta diomedae (Dall, 1908)
- Acesta excavata (Fabricius, 1779)
- Acesta goliath (G. B. Sowerby III, 1883)
- Acesta imitata (Suter, 1917) †
- Acesta indica (E. A. Smith, 1899)
- Acesta kronenbergi Thach, 2015
- Acesta levitesta (Finlay, 1927) †
- Acesta marissinica Yamashita & Habe, 1969
- Acesta maui B. A. Marshall, 2001
- Acesta mori (Hertlein, 1952)
- Acesta niasensis (Thiele, 1918)
- Acesta oophaga Järnegren, Schander & Young, 2007
- Acesta patagonica (Dall, 1902)
- Acesta philippinensis (Bartsch, 1913)
- Acesta rathbuni (Bartsch, 1913)
- Acesta regia (Suter, 1917) †
- Acesta saginata B. A. Marshall, 2001
- Acesta smithi (G. B. Sowerby III, 1888)
- Acesta sphoni (Hertlein, 1963)
- Acesta verdensis (Bartsch, 1913)
- Acesta virgo Habe & Okutani, 1968
- Acesta vitrina Poppe, Tagaro & Stahlschmidt, 2015
Mollusca → Bivalvia → Pteriomorphia → Limoida → Limoidea → Limidae
Ach
- Acharax
- Achatinellidae
- Achatinelloidea
- Achatinoidea
Aci
- Acila
- Acinodrillia
- Acirsa
Acl
- Acliceratia
- Aclididae
- Aclis
- Aclistothyra
- Aclophora
- Aclophoropsis
- Aclyvolva
Acm
- Acmaea
- Acmaeidae
- Acmaturris
- Acmella
Aco
- Acochlidiacea
- Acochlidiidae
- Acochlidioidea
- Acochlidium
- Acostaea
Acr
- Acremodonta
- Acremodontina
- Acreuciroa
- Acrilloscala
- Acrochalix
- Acroloxidae
- Acroloxoidea
- Acroloxus
- Acrosterigma
Act
- Acteocina
- Acteon
- Acteonidae
- Acteonoidea
- Actinocyclidae
- Actinocyclus
- Actinonaias
Acu
- Aculamprotula
- Acus
- Acuticosta