Psa
Psammastra Sollas, 1886
- Psammastra conulosa Kieschnick, 1896
- Psammastra murrayi Sollas, 1886
- Psammastra oxygigas Lévi, 1993
Porifera → Demospongiae → Heteroscleromorpha → Tetractinellida → Astrophorina → Ancorinidae
Psammochela Dendy, 1916
- Psammochela chaliniformis (Carter, 1885)
- Psammochela elegans Dendy, 1916
- Psammochela fibrosa (Ridley, 1884)
- Psammochela psammodes (Hentschel, 1911)
- Psammochela rigida (Bowerbank, 1875)
- Psammochela tutiae de Voogd, 2012
Porifera → Demospongiae → Heteroscleromorpha → Poecilosclerida → Myxillidae
Psammocinia Lendenfeld, 1889
- Psammocinia amodes Cook & Bergquist, 1998
- Psammocinia arenosa (Lendenfeld, 1888)
- Psammocinia beresfordae Cook & Bergquist, 1996
- Psammocinia bergquistae Sim & Lee, 2001
- Psammocinia bulbosa Bergquist, 1995
- Psammocinia charadrodes Cook & Bergquist, 1998
- Psammocinia compacta (Poléjaeff, 1884)
- Psammocinia conulosa Lee & Sim, 2004
- Psammocinia gageoensis Sim & Lee, 2001
- Psammocinia halmiformis (Lendenfeld, 1888)
- Psammocinia hawere Cook & Bergquist, 1996
- Psammocinia hirsuta Cook & Bergquist, 1998
- Psammocinia jejuensis Sim, 1998
- Psammocinia lobatus Sim & Lee, 2002
- Psammocinia mammiformis Sim, 1998
- Psammocinia maorimotu Cook & Bergquist, 1998
- Psammocinia mosulpia Sim, 1998
- Psammocinia papillata Cook & Bergquist, 1998
- Psammocinia perforodosa Cook & Bergquist, 1998
- Psammocinia rubra Sim & Lee, 2002
- Psammocinia samyangensis Sim & Lee, 1998
- Psammocinia ulleungensis Lee & Sim, 2004
- Psammocinia verrucosa Cook & Bergquist, 1996
- Psammocinia vesiculifera (Poléjaeff, 1884)
- Psammocinia wandoensis Sim & Lee, 1998
Porifera → Demospongiae → Keratosa → Dictyoceratida → Irciniidae
Psammoclema Marshall, 1880
- Psammoclema arenaceum (Lévi, 1958)
- Psammoclema bitextum Wiedenmayer, 1989
- Psammoclema callosum (Marshall, 1880)
- Psammoclema decipiens (Marshall, 1880)
- Psammoclema densum (Marshall, 1880)
- Psammoclema digitiferum (Lendenfeld, 1889)
- Psammoclema finmarchicum (Hentschel, 1929)
- Psammoclema fissuratum Wiedenmayer, 1989
- Psammoclema foliaceum Poléjaeff, 1884
- Psammoclema fuliginosum (Carter, 1885)
- Psammoclema goniodes Wiedenmayer, 1989
- Psammoclema inordinatum (Kirkpatrick, 1903)
- Psammoclema marshalli (Lendenfeld, 1888)
- Psammoclema nicaeense (Pulitzer-Finali & Pronzato, 1980)
- Psammoclema nodosum (Carter, 1885)
- Psammoclema porosum (Polejaeff, 1884)
- Psammoclema radiatum Wiedenmayer, 1989
- Psammoclema ramosum Marshall, 1880
- Psammoclema rubrum (Lévi, 1958)
- Psammoclema rugosum (Lendenfeld, 1888)
- Psammoclema stellidermatum (Carter, 1885)
- Psammoclema stipitatum Wiedenmayer, 1989
- Psammoclema tuberculatum (Lendenfeld, 1889)
- Psammoclema vansoesti Wiedenmayer, 1989
- Psammoclema vosmaeri Poléjaeff, 1884
Porifera → Demospongiae → Heteroscleromorpha → Poecilosclerida → Chondropsidae
Pse
Pseudoceratina Carter, 1885
- Pseudoceratina arabica (Keller, 1889)
- Pseudoceratina durissima Carter, 1885
- Pseudoceratina purpurea (Carter, 1880)
- Pseudoceratina verrucosa Bergquist, 1995
Porifera → Demospongiae → Verongimorpha → Verongiida → Pseudoceratinidae
Porodica Pseudoceratinidae Carter, 1885
- Pseudoceratina Carter, 1885
Porifera → Demospongiae → Verongimorpha → Verongiida
Pseudocorticium Boury-Esnault et al., 1995
- Pseudocorticium jarrei Boury-Esnault, Muricy, Gallissian & Vacelet, 1995
Porifera → Homoscleromorpha → Homosclerophorida → Oscarellidae
Pseudohalichondria Carter, 1886
- Pseudohalichondria clavatancora (Topsent, 1927)
- Pseudohalichondria clavilobata Carter, 1886
- Pseudohalichondria fibrosa Whitelegge, 1901
Porifera → Demospongiae → Heteroscleromorpha → Poecilosclerida → Hymedesmiidae
Pseudoplectella Tabachnick, 1990
- Pseudoplectella dentatum Tabachnick, 1990
Porifera → Hexactinellida → Hexasterophora → Lyssacinosida → Euplectellidae → Corbitellinae
Pseudospongosorites McCormack & Kelly, 2002
- Pseudospongosorites suberitoides (Diaz, van Soest & Pomponi, 1993)
Porifera → Demospongiae → Heteroscleromorpha → Suberitida → Suberitidae
Pseudosuberites Topsent, 1896
- Pseudosuberites andrewsi Kirkpatrick, 1900
- Pseudosuberites cava Sollas, 1902
- Pseudosuberites digitatus (Thiele, 1905)
- Pseudosuberites exalbicans Topsent, 1913
- Pseudosuberites hyalinus (Ridley & Dendy, 1886)
- Pseudosuberites incrustans (Thiele, 1898)
- Pseudosuberites kunisakiensis Hoshino, 1981
- Pseudosuberites lobulatus (Lévi, 1961)
- Pseudosuberites mollis Topsent, 1925
- Pseudosuberites montiniger (Carter, 1880)
- Pseudosuberites nudus Koltun, 1964
- Pseudosuberites perforatus (Thiele, 1898)
- Pseudosuberites purpureus (de Laubenfels, 1954)
- Pseudosuberites sadko Koltun, 1966
- Pseudosuberites sulcatus (Thiele, 1905)
- Pseudosuberites sulphureus (Bowerbank, 1866)
- Pseudosuberites vakai Desqeyroux-Faundez, 1990
Porifera → Demospongiae → Heteroscleromorpha → Suberitida → Suberitidae
Pseudotrachya Hallmann, 1914
- Pseudotrachya amaza (de Laubenfels, 1934)
- Pseudotrachya hystrix (Topsent, 1890)
Porifera → Demospongiae → Heteroscleromorpha → Polymastiida → Polymastiidae
Psi
Psilocalyx Ijima, 1927
- Psilocalyx wilsoni Ijima, 1927
Porifera → Hexactinellida → Hexactinosida → Sceptrulophora → Tretodictyidae