• Abyssascidia millari Monniot F., 1971: solitary
• Abyssascidia pedunculata Sluiter, 1904: solitary
• Abyssascidia wyvillii Herdman, 1880: solitary
• Adagnesia antarctica Kott, 1969: solitary
• Adagnesia bifida Millar, 1970: solitary
• Adagnesia cautis Monniot C., 1991: solitary
• Adagnesia charcoti Monniot C. & Monniot F., 1973: solitary
• Adagnesia fissa Monniot F. & Monniot C., 1976: solitary
• Adagnesia henriquei Monniot C. & Monniot F., 1983: solitary
• Adagnesia opaca Kott, 1963: solitary
• Adagnesia pacifica Sanamyan & Sanamyan, 1998: solitary
• Adagnesia rimosa Monniot C. & Monniot F., 1974: solitary
• Adagnesia venusta Kott, 1985: solitary
• Adagnesia vesiculiphora Nishikawa, 1982: solitary
• Adagnesia weddelli Monniot C. & Monniot F., 1994: solitary
• Agnezia abyssa Sanamyan & Sanamyan, 2002: solitary
• Agnezia arnaudi (Monniot C. & Monniot F., 1974): solitary
• Agnezia atlantica (Monniot C. & Monniot F., 1973): solitary
• Agnezia biscoei (Monniot C. & Monniot F., 1983): solitary
• Agnezia capensis (Millar, 1955): solitary
• Agnezia celtica (Monniot C. & Monniot F., 1974): solitary
• Agnezia glaciata Michaelsen, 1898: solitary
• Agnezia himeboja (Oka, 1915): solitary
• Agnezia monnioti Young & Vazquez, 1997: solitary
• Agnezia orthenteron (Redikorzev, 1941): solitary
• Agnezia sabulosa (Redikorzev, 1941): solitary
• Agnezia septentrionalis (Huntsman, 1912): solitary
• Agnezia tenue (Monniot C. & Monniot F., 1983): solitary
• Anomopera ingolfiana Hartmeyer, 1923: solitary
• Araneum pedunculatum Monniot C. & Monniot F., 1991: solitary
• Araneum sigma Monniot C. & Monniot F., 1973: solitary
• Asajirus arcticus (Hartmeyer, 1923): solitary
• Asajirus dichotomus (Monniot C. & Monniot F., 1984): solitary
• Asajirus eunuchus (Monniot F. & Monniot C., 1976): solitary
• Asajirus gulosus (Monniot C. & Monniot F., 1984): solitary
• Asajirus hemisphericus (Monniot C. & Monniot F., 1990): solitary
• Asajirus indicus (Oka, 1913): solitary
• Asajirus ledanoisi (Monniot C. & Monniot F., 1990): solitary
• Asajirus ovirarus (Monniot C. & Monniot F., 1990): solitary
• Ascidia achimotae Millar, 1953: solitary
• Ascidia ahodori Oka, 1927: solitary
• Ascidia alisea Monniot F. & Monniot C., 2006: solitary
• Ascidia alpha Tokioka, 1953: solitary
• Ascidia alterna Monniot C. & Monniot F., 1991: solitary
• Ascidia andamanensis Oka, 1915: solitary
• Ascidia archaia Sluiter, 1890: solitary
• Ascidia arenosa Hartmeyer, 1898: solitary
• Ascidia armata Hartmeyer, 1906: solitary
• Ascidia aspera Brunetti, 2007: solitary
• Ascidia austera Sluiter, 1904: solitary
• Ascidia aximensis Millar, 1953: solitary
• Ascidia azurea Monniot F. & Monniot C., 1996: solitary
• Ascidia bathybia Hartmeyer, 1922: solitary
• Ascidia bifissa Sluiter, 1895: solitary
• Ascidia bocatorensis Bonnet & Rocha, 2011: solitary
• Ascidia callosa Stimpson, 1852: solitary
• Ascidia canaliculata Heller, 1878: solitary
• Ascidia cannelata Oken, 1820: solitary
• Ascidia capillata Sluiter, 1887: solitary
• Ascidia caudata Heller, 1878: solitary
• Ascidia celtica Monniot C., 1969: solitary
• Ascidia ceratodes (Huntsman, 1912): solitary
• Ascidia challengeri Herdman, 1882: solitary
• Ascidia citrina Nishikawa & Tokioka, 1975: solitary
• Ascidia clementea Ritter, 1907: solitary
• Ascidia colleta Monniot C. & Monniot F., 1970: solitary
• Ascidia collini Bonnet & Rocha, 2011: solitary
• Ascidia columbiana (Huntsman, 1912): solitary
• Ascidia conchilega Müller, 1776: solitary
• Ascidia conifera (Hartmeyer, 1911): solitary
• Ascidia corallicola Bonnet & Rocha, 2011: solitary
• Ascidia correi Monniot C., 1970: solitary
• Ascidia curvata (Traustedt, 1882): solitary
• Ascidia decepta Kott, 1985: solitary
• Ascidia depressiuscula Heller, 1878: solitary
• Ascidia despecta Herdman, 1880: solitary
• Ascidia dijmphniana (Traustedt, 1886): solitary
• Ascidia dorsata Meenakshi & Renganathan, 1999: solitary
• Ascidia empheres Sluiter, 1895: solitary
• Ascidia escabanae Monniot C., 1998: solitary
• Ascidia fictile Monniot C., 1997: solitary
• Ascidia fistulosa Monniot C. & Monniot F., 1967: solitary
• Ascidia formella Monniot C., 1998: solitary
• Ascidia fusca Monniot C. & Monniot F., 1989: solitary
• Ascidia gamma Tokioka, 1954: solitary
• Ascidia gemmata Sluiter, 1895: solitary
• Ascidia glabra Hartmeyer, 1922: solitary
• Ascidia hyalina Oka, 1915: solitary
• Ascidia iberica Monniot C. & Monniot F., 1988: solitary
• Ascidia incrassata Heller, 1878: solitary
• Ascidia indica Meenakshi, 2005: solitary
• Ascidia interrupta Heller, 1878: solitary
• Ascidia involuta Heller, 1875: solitary
• Ascidia irregularis Oka, 1915: solitary
• Ascidia kesavanica Meenakshi, 2005: solitary
• Ascidia kreagra Sluiter, 1895: solitary
• Ascidia krechi Michaelsen, 1904: solitary
• Ascidia kuneides Sluiter, 1887: solitary
• Ascidia lagena Michaelsen, 1922: solitary
• Ascidia lambertae Monniot F., 2007: solitary