• [non-Uristidae] albinus (K.H. Barnard, 1932): Exoskeleton (including shells)
• [non-Uristidae] dawsoni Hurley, 1963: Exoskeleton (including shells)
• [non-Uristidae] georgianus (Schellenberg, 1931): Exoskeleton (including shells)
• [non-Uristidae] natalensis K.H. Barnard, 1916: Exoskeleton (including shells)
• Aahithis erraticus (Schallreuter, 1985) †: Exoskeleton (including shells)
• Aahithis vanspronsenae Schallreuter, 1988 †: Exoskeleton (including shells)
• Aaleniella (Aaleniella) compressa Plumhoff, 1963 †: Exoskeleton (including shells)
• Aaleniella (Danocythere) gracilis Christensen & Kilenyi, 1970 †: Exoskeleton (including shells)
• Aaleniella (Danocythere) inornata (Kilenyi, 1969) †: Exoskeleton (including shells)
• Aaleniella cuneata Wakefield, 1994 †: Exoskeleton (including shells)
• Aaleniella franzi Tesakova, E. M. †: Exoskeleton (including shells)
• Aaleniella reticulata Knitter, 1983 †: Exoskeleton (including shells)
• Aaleniella volganica Tesakova, E. M. †: Exoskeleton (including shells)
• Aatolana rapax Bruce, 1993: Exoskeleton (including shells)
• Aatolana schioedtei (Miers, 1884): Exoskeleton (including shells)
• Aatolana springthorpei Keable, 1998: Exoskeleton (including shells)
• Abasia inflata Cressey & Cressey, 1979: Exoskeleton (including shells)
• Abasia pillaii Cressey & Cressey, 1979: Exoskeleton (including shells)
• Abasia platyrostris Pillai, 1963: Exoskeleton (including shells)
• Abasia pseudorostris Wilson C.B., 1908: Exoskeleton (including shells)
• Abasia pusilla Cressey & Cressey, 1979: Exoskeleton (including shells)
• Abasia tripartita (Shiino, 1955): Exoskeleton (including shells)
• Abatetia robusta (Parent, 1933): Exoskeleton (including shells)
• Abathescalpellum fissum (Hoek, 1907): Exoskeleton (including shells)
• Abathescalpellum koreanum (Hiro, 1933): Exoskeleton (including shells)
• Abdia latipalpus (Walker & Scott, 1903): Exoskeleton (including shells)
• Abdiacyclops cirratus Karanovic, 2005: Exoskeleton (including shells)
• Abditacythere subterranea Hartmann, 1964: Exoskeleton (including shells)
• Abditoloculina filaloculina Tillman & Murphy, 1978 †: Exoskeleton (including shells)
• Abebaioscia troglodytes Vandel, 1973: Exoskeleton (including shells)
• Abergasilus amplexus Hewitt, 1978: Exoskeleton (including shells)
• Aberomysis muranoi Bacescu & Iliffe, 1986: Exoskeleton (including shells)
• Aberratylus aberrantis (J.L. Barnard, 1962): Exoskeleton (including shells)
• Aberroconcha plicata Adamczak, 1961 †: Exoskeleton (including shells)
• Abgrallaspis cyanophylli (Signoret, 1869): Exoskeleton (including shells)
• Abietinaria abietina (Linnaeus, 1758): Exoskeleton (including shells)
• Abietinaria alexanderi Nutting, 1904: Exoskeleton (including shells)
• Abietinaria alternitheca (Kudelin, 1914): Exoskeleton (including shells)
• Abietinaria anguina (Trask, 1857): Exoskeleton (including shells)
• Abietinaria annulata (Kirchenpauer, 1884): Exoskeleton (including shells)
• Abietinaria compressa (Merezhkovskii, 1878): Exoskeleton (including shells)
• Abietinaria crassiparia Naumov, 1960: Exoskeleton (including shells)
• Abietinaria cruciformis Antsulevich, 1987: Exoskeleton (including shells)
• Abietinaria derbeki (Kudelin, 1913): Exoskeleton (including shells)
• Abietinaria elsaeoswaldae Stechow, 1923: Exoskeleton (including shells)
• Abietinaria expansa Fraser, 1938: Exoskeleton (including shells)
• Abietinaria filicula (Ellis & Solander, 1786): Exoskeleton (including shells)
• Abietinaria fusca (Johnston, 1847): Exoskeleton (including shells)
• Abietinaria gagarae Naumov, 1960: Exoskeleton (including shells)
• Abietinaria gigantea (Clark, 1877): Exoskeleton (including shells)
• Abietinaria gracilis Nutting, 1904: Exoskeleton (including shells)
• Abietinaria immersa Vervoort, 1993: Exoskeleton (including shells)
• Abietinaria inconstans (Clark, 1877): Exoskeleton (including shells)
• Abietinaria interversa (Pictet & Bedot, 1900): Exoskeleton (including shells)
• Abietinaria juniperus Kirchenpauer, 1884: Exoskeleton (including shells)
• Abietinaria kincaidi (Nutting, 1901): Exoskeleton (including shells)
• Abietinaria laevimarginata (Ritchie, 1907): Exoskeleton (including shells)
• Abietinaria macrotheca Naumov, 1960: Exoskeleton (including shells)
• Abietinaria melo Kirchenpauer, 1884: Exoskeleton (including shells)
• Abietinaria merkii Kirchenpauer, 1884: Exoskeleton (including shells)
• Abietinaria pulchra (Nutting, 1904): Exoskeleton (including shells)
• Abietinaria raritheca Naumov, 1960: Exoskeleton (including shells)
• Abietinaria rigida Fraser, 1911: Exoskeleton (including shells)
• Abietinaria smirnowi (Kudelin, 1914): Exoskeleton (including shells)
• Abietinaria spiralis Naumov, 1960: Exoskeleton (including shells)
• Abietinaria thuiarioides (Clark, 1877): Exoskeleton (including shells)
• Abietinaria traski (Torrey, 1902): Exoskeleton (including shells)
• Abietinaria trigona Antsulevich, 1987: Exoskeleton (including shells)
• Abietinaria turgida (Clark, 1877): Exoskeleton (including shells)
• Abietinaria variabilis (Clark, 1877): Exoskeleton (including shells)
• Abietinella operculata (Jäderholm, 1903): Exoskeleton (including shells)
• Ablabesmyia mala (Hutton, 1902): Exoskeleton (including shells)
• Abludogammarus flavus (Dybowsky, 1874): Exoskeleton (including shells)
• Abludomelita aculeata (Chevreux, 1911): Exoskeleton (including shells)
• Abludomelita amoena (Hansen, 1888): Exoskeleton (including shells)
• Abludomelita breviarticulata (Ren, 2012): Exoskeleton (including shells)
• Abludomelita denticulata (Nagata, 1965): Exoskeleton (including shells)
• Abludomelita gladiosa (Spence Bate & Westwood, 1862): Exoskeleton (including shells)
• Abludomelita huanghaiensis (Ren, 2012): Exoskeleton (including shells)
• Abludomelita japonica (Nagata, 1965): Exoskeleton (including shells)
• Abludomelita klitinii Labay, 2016: Exoskeleton (including shells)
• Abludomelita machaera (K.H. Barnard, 1955): Exoskeleton (including shells)
• Abludomelita mucronata (Griffiths, 1975): Exoskeleton (including shells)
• Abludomelita obtusata (Montagu, 1813): Exoskeleton (including shells)
• Abludomelita okhotensis Labay, 2016: Exoskeleton (including shells)
• Abludomelita richardi (Chevreux, 1900): Exoskeleton (including shells)
• Abludomelita rotundactyla (Ren, 2012): Exoskeleton (including shells)
• Abludomelita somovae (Bulyčeva, 1952): Exoskeleton (including shells)
• Abludomelita unamoena (Hirayama, 1987): Exoskeleton (including shells)
• Abnitocrella eberhardi Karanovic, 2006: Exoskeleton (including shells)
• Abnitocrella halsei Karanovic, 2006: Exoskeleton (including shells)
• Abnitocrella newmanensis Karanovic, 2006: Exoskeleton (including shells)
• Aboilia blessi Becker & Adamczak, 1993 †: Exoskeleton (including shells)
• Abormon capillosum Mitra, Pati & Ng, 2021: Exoskeleton (including shells)
• Abormon praecalvum Mitra, Pati & Ng, 2021: Exoskeleton (including shells)
• Aborolobatea insidiosa Hughes & Lowry, 2009: Exoskeleton (including shells)
• Aborolobatea paracheliformis Ledoyer, 1984: Exoskeleton (including shells)
• Abortelphusa namdaphaensis Mitra, 2020: Exoskeleton (including shells)
• Abortivelum truncatum Berdan & Copeland, 1973 †: Exoskeleton (including shells)
• Abrocythereis feishania Hu & Tao, 2008: Exoskeleton (including shells)