Class Ascidiacea
Class Ascidiacea (3 orders, 19 families, +90 genera, +377 species)
- Order Enterogona (13 families, +50 genera, +198 species)
- Family Agnesiidae (3 genera, 5 species)
- Genus Adagnesia (2 species)
- Adagnesia charcotia
- Adagnesia rimosa
- Genus Agnezia (2 species)
- Agnezia atlantica
- Agnezia celtica
- Genus Proagnesia (1 species)
- Family Ascidiidae (4 genera, 18 species)
- Genus Ascidia
- Ascidia callosa
- Ascidia celtica
- Ascidia conchilega
- Ascidia correi
- Ascidia dijmphniana
- Ascidia iberica
- Ascidia interrupta
- Ascidia involuta
- Ascidia malaca
- Ascidia mediterranea
- Ascidia mentula
- Ascidia molguloides
- Ascidia muricata
- Ascidia obliqua
- Ascidia prunum
- Ascidia salvatoris
- Ascidia tritonis
- Ascidia virginea
- Genus Ascidiella (2 species)
- Ascidiella aspersa
- Ascidiella scabra
- Genus Phallusia (6 species)
- Phallusia arabica
- Phallusia colleta
- Phallusia fumigata
- Phallusia ingeria
- Phallusia mammillata
- Phallusia nigra
- Genus Psammascidia (1 species)
- Family Cionidae (6 genera, 12 species)
- Genus Araneum (1 species)
- Genus Ciona (5 species)
- Ciona edwardsi
- Ciona fascicularis
- Ciona gelatinosa
- Ciona imperfecta
- Ciona intestinalis
- Genus Diazona (1 species)
- Genus Pseudodiazona (1 species)
- Genus Rhopalaea (3 species)
- Rhopalaea hartmeyeri
- Rhopalaea neapolitana
- Rhopalaea orientalis
- Genus Tylobranchion (1 species)
- Family Clavelinidae (3 genera, 9 species)
- Genus Archidistoma (2 species)
- Archidistoma aggregatum
- Archidistoma productum
- Genus Clavelina (7 species)
- Clavelina borealis
- Clavelina dellavallei
- Clavelina lepadiformis
- Clavelina nana
- Clavelina oblonga
- Clavelina phlegraea
- Clavelina sabbadini
- Genus Pycnoclavella
- Family Corellidae (7 genera, 12 species)
- Genus Abyssascidia (1 species)
- Genus Chelyosoma (1 species)
- Genus Corella (3 species)
- Corella borealis
- Corella halli
- Corella parallelogramma
- Genus Corellopsis (1 species)
- Genus Corynascidia (3 species)
- Corynascidia hartmeyeri
- Corynascidia suhmi
- Corynascidia translucida
- Genus Rhodosoma (2 species)
- Rhodosoma callensis
- Rhodosoma turcicum
- Genus Xenobranchion (1 species)
- Family Diazonidae
- Family Didemnidae (6 genera, 39 species)
- Genus Didemnum (16 species)
- Didemnum albidum
- Didemnum amourouxi
- Didemnum coccineum
- Didemnum commune
- Didemnum coriaceum
- Didemnum drachi
- Didemnum fulgens
- Didemnum granulosum
- Didemnum lahillei
- Didemnum maculosum
- Didemnum perspicuum
- Didemnum peyreffitense
- Didemnum polare
- Didemnum protectum
- Didemnum pseudofulgens
- Didemnum romssae
- Genus Diplosoma (6 species)
- Diplosoma carnosum
- Diplosoma lafargueae
- Diplosoma listerianum
- Diplosoma ponticum
- Diplosoma singulare
- Diplosoma spongiforme
- Genus Leptoclinides (1 species)
- Genus Lissoclinum (4 species)
- Lissoclinum aureum
- Lissoclinum perforatum
- Lissoclinum rubrum
- Lissoclinum weigelei
- Genus Polysyncraton (6 species)
- Polysyncraton amethysteum
- Polysyncraton asterix
- Polysyncraton bilobatum
- Polysyncraton canetense
- Polysyncraton haranti
- Polysyncraton lacazei
- Genus Trididemnum (6 species)
- Trididemnum cereum
- Trididemnum delesseriae
- Trididemnum inarmatum
- Trididemnum pedunculatum
- Trididemnum tenerum
- Trididemnum translucidum
- Family Hypobithiidae
- Family Octacnemidae (3 genera, 3 species)
- Genus Dicopia (1 species)
- Genus Octacnemus (1 species)
- Genus Situla (1 species)
- Family Perophoridae (2 genera, 8 species)
- Genus Ecteinascidia (3 species)
- Ecteinascidia herdmani
- Ecteinascidia styeloides
- Ecteinascidia turbinata
- Genus Perophora (5 species)
- Perophora bermudensis
- Perophora japonica
- Perophora listeri
- Perophora multiclathrata
- Perophora viridis
- Family Pleurellidae
- Family Polycitoridae (8 genera, 30 species)
- Genus Archiascidia (1 species)
- Genus Cystodytes (3 species)
- Cystodytes dellechiajei
- Cystodytes durus
- Cystodytes guinensis
- Genus Distaplia (6 species)
- Distaplia bermudensis
- Distaplia clavata
- Distaplia corolla
- Distaplia livida
- Distaplia magnilarva
- Distaplia rosea
- Genus Eudistoma (14 species)
- Eudistoma angolanum
- Eudistoma banyulense
- Eudistoma clarum
- Eudistoma costai
- Eudistoma magnum
- Eudistoma mucosum
- Eudistoma paesslerioides
- Eudistoma planum
- Eudistoma plumbeum
- Eudistoma posidonarium
- Eudistoma roseum
- Eudistoma rubrum
- Eudistoma tridentatum
- Eudistoma vitreum
- Genus Polycitor (3 species)
- Polycitor adriaticus
- Polycitor crystallinus
- Polycitor searli
- Genus Protoholozoa (1 species)
- Genus Rhombifera (1 species)
- Genus Sycozoa (1 species)
- Family Polyclinidae (8 genera, 62 species)
- Genus Aplidiopsis (2 species)
- Aplidiopsis atlanticus
- Aplidiopsis vitreum
- Genus Aplidium (40 species)
- Aplidium aegeaensis
- Aplidium albicans
- Aplidium appendiculatum
- Aplidium argus
- Aplidium asperum
- Aplidium bermudae
- Aplidium brementi
- Aplidium caeruleum
- Aplidium conicum
- Aplidium densum
- Aplidium elegans
- Aplidium enigmaticum
- Aplidium fuscum
- Aplidium gibbulosum
- Aplidium glabrum
- Aplidium griseum
- Aplidium haouarianum
- Aplidium hyalinum
- Aplidium inversum
- Aplidium lobatum
- Aplidium mediterraneum
- Aplidium mutabile
- Aplidium nema
- Aplidium nordmani
- Aplidium ocellatum
- Aplidium pallidum
- Aplidium polytrema
- Aplidium proliferum
- Aplidium pseudolobatum
- Aplidium punctum
- Aplidium radicosum
- Aplidium sagresensis
- Aplidium schaudinni
- Aplidium spitzbergense
- Aplidium tabarquensis
- Aplidium translucidum
- Aplidium tridentatum
- Aplidium turbinatum
- Aplidium urgorrii
- Aplidium punctum
- Genus Polyclinella (1 species)
- Genus Polyclinum (3 species)
- Polyclinum aurantium
- Polyclinum saturnium
- Polyclinum sibiricum
- Genus Pseudodistoma (4 species)
- Pseudodistoma arnbacki
- Pseudodistoma crucigaster
- Pseudodistoma cyrnusense
- Pseudodistoma obscurum
- Genus Ritterella (1 species)
- Genus Sidneioides (1 species)
- Genus Synoicum (10 species)
- Synoicum beauchampi
- Synoicum blochmanni
- Synoicum daucum
- Synoicum diaphanum
- Synoicum incrustatum
- Synoicum lacazei
- Synoicum pomum
- Synoicum pulmonaria
- Synoicum turgens
- Synoicum vibei
- Order Pleurogona (5 families, +40 genera, +179 species)
- Family Botryllidae (1 genus, 1 species)
- Genus Botrylloides (1 species)
- Family Molgulidae (8 genera, 51 species)
- Genus Anomopera (1 species)
- Genus Eugyra (3 species)
- Eugyra adriatica
- Eugyra arenosa
- Eugyra pedunculata
- Genus Eugyrioides (3 species)
- Eugyrioides borealis
- Eugyrioides glutinans
- Eugyrioides islandica
- Genus Gamaster (1 species)
- Genus Molgula (39 species)
- Molgula amesophleba
- Molgula appendiculata
- Molgula bleizi
- Molgula caminae
- Molgula celtica
- Molgula citrina
- Molgula complanata
- Molgula crustosa
- Molgula dextrocarpa
- Molgula echinosiphonica
- Molgula euprocta
- Molgula griffithsi
- Molgula helleri
- Molgula herdmani
- Molgula hirta
- Molgula impura
- Molgula kiaeri
- Molgula kilaensis
- Molgula manhattensis
- Molgula mira
- Molgula occidentalis
- Molgula occulta
- Molgula oculata
- Molgula plana
- Molgula platybranchia
- Molgula pumila
- Molgula retortiformis
- Molgula rheophila
- Molgula romeri
- Molgula roulei
- Molgula satyrus
- Molgula simplex
- Molgula siphonalis
- Molgula siphonata
- Molgula socialis
- Molgula solenata
- Molgula tethys
- Molgula tubifera
- Molgula vara
- Genus Molguloides (1 species)
- Genus Pareugyrioides (1 species)
- Genus Protomolgula (2 species)
- Protomolgula bythia
- Protomolgula triangularis
- Family Polyzoidae
- Family Pyuridae (12 genera, 41 species)
- Genus Bathypyura (1 species)
- Genus Boltenia (3 species)
- Boltenia echinata
- Boltenia ovifer
- Boltenia pilosa
- Genus Bolteniopsis (2 species)
- Bolteniopsis prenanti
- Bolteniopsis sessilis
- Genus Cratostigma (6 species)
- Cratostigma gravellophila
- Cratostigma intermedia
- Cratostigma regularis
- Cratostigma simplex
- Cratostigma singularis
- Cratostigma vestigialis
- Genus Culeolus (1 species)
- Genus Dextrogaster (1 species)
- Genus Halocynthia (3 species)
- Halocynthia papillosa
- Halocynthia pyriformis
- Halocynthia spinosa
- Genus Herdmania (1 species)
- Genus Heterostigma (6 species)
- Heterostigma fagei
- Heterostigma gonochorica
- Heterostigma mediterranea
- Heterostigma melitensis
- Heterostigma reptans
- Heterostigma separ
- Genus Microcosmus (10 species)
- Microcosmus claudicans
- Microcosmus exasperatus
- Microcosmus glacialis
- Microcosmus hernius
- Microcosmus nudistigma
- Microcosmus polymorphus
- Microcosmus pupa
- Microcosmus sabatieri
- Microcosmus savignyi
- Microcosmus vulgaris
- Genus Minipera (2 species)
- Minipera papillosa
- Minipera pedunculata
- Genus Pyura (5 species)
- Pyura dura
- Pyura gangelion
- Pyura microcosmus
- Pyura squamulosa
- Pyura tessellata
- Family Styelidae (19 genera, 86 species)
- Genus Alloeocarpa (1 species)
- Genus Bathyoncus (1 species)
- Genus Bathystyeloides (3 species)
- Bathystyeloides dubius
- Bathystyeloides enderbyanus
- Bathystyeloides laubieri
- Genus Botryllus (3 species)
- Botryllus aureus
- Botryllus leachi
- Botryllus schlosseri
- Genus Cnemidocarpa (17 species)
- Cnemidocarpa annectens
- Cnemidocarpa bathyphila
- Cnemidocarpa bythia
- Cnemidocarpa cirrata
- Cnemidocarpa clipeata
- Cnemidocarpa devia
- Cnemidocarpa digonas
- Cnemidocarpa finmarkiensis
- Cnemidocarpa hartmeyeri
- Cnemidocarpa margaritifera
- Cnemidocarpa mollis
- Cnemidocarpa mollispina
- Cnemidocarpa mortenseni
- Cnemidocarpa platybranchia
- Cnemidocarpa rhizopus
- Cnemidocarpa sabulosa
- Cnemidocarpa squamata
- Genus Dendrodoa (7 species)
- Dendrodoa aggregata
- Dendrodoa carnea
- Dendrodoa grossularia
- Dendrodoa lineata
- Dendrodoa minuta
- Dendrodoa pulchella
- Dendrodoa uniplicata
- Genus Dicarpa (1 species)
- Genus Distomus (3 species)
- Distomus fuscus
- Distomus hupferi
- Distomus variolosus
- Genus Eusynstyela (2 species)
- Eusynstyela beuziti
- Eusynstyela hartmeyeri
- Genus Kukenthalia (1 species)
- Genus Pelonaia (1 species)
- Genus Polyandrocarpa (1 species)
- Polyandrocarpa zorritensis
- Genus Polycarpa (21 species)
- Polycarpa arnbackae
- Polycarpa biscayensis
- Polycarpa caudata
- Polycarpa comata
- Polycarpa discoidea
- Polycarpa errans
- Polycarpa fibrosa
- Polycarpa gracilis
- Polycarpa itera
- Polycarpa kornogi
- Polycarpa mamillaris
- Polycarpa offa
- Polycarpa pentarhiza
- Polycarpa pomaria
- Polycarpa porculus
- Polycarpa pseudoalbatrossi
- Polycarpa pusilla
- Polycarpa rockallensis
- Polycarpa scuba
- Polycarpa tenera
- Polycarpa violacea
- Genus Protostyela (2 species)
- Protostyela heterobranchia
- Protostyela longicauda
- Genus Psammostyela (1 species)
- Genus Seriocarpa (1 species)
- Genus Stolonica (1 species)
- Genus Styela (18 species)
- Styela adriatica
- Styela atlantica
- Styela bathybia
- Styela calva
- Styela canopus
- Styela chaini
- Styela charcoti
- Styela clava
- Styela coriacea
- Styela crinita
- Styela gelatinosa
- Styela gibbsii
- Styela loculosa
- Styela plicata
- Styela rustica
- Styela sigma
- Styela similis
- Styela thalassae
- Genus Tibitin (1 species)
- Order Aspiraculata (1 family)
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