Traits Taxon list
Aaptotoichus challengeri Holbourn & Kaminski, 1995 †
Aaptotoichus clavellatus (Loeblich & Tappan, 1946) †
Aaptotoichus mutinensis Haig & McCartain, 2010 †
Aaptotoichus quinnaniensis Haig, 2003 †
Aaptotoichus vallis (Trifonova, 1967) †
Abadehella biconvexa Okimura & Ishii, 1975 †
Abadehella coniformis Okimura & Ishii, 1975 †
Abadehella grandis Pronina-Nestell, 2001 †
Abadehella iwaiensis Kobayashi, 1997 †
Abadehella koryakiensis Daydov in Davydov et al., 1996 †
Abadehella mengcunensis Wang, 2002 †
Abadehella minima Wang in Zhao et al., 1981 †
Abadehella tarazi Okimura & Ishii, 1975 †
Abadehellopsis longlinensis (Lin, Li & Sun, 1990) †
Abadehellopsis pauciseptata Vachard in Krainer, Vachard & Schaffhauser, 2019 †
Abadehellopsis protea (Cushman & Waters, 1928) †
Abadehellopsis regularis (Lin, Li & Sun, 1990) †
Abadehellopsis regularisaeformis (Lin, Li & Sun, 1990) †
Abas wittii (Grunow) R.Ross & P.A.Sims, 1980 †
Abathomphalus asteroidalis Salaj, 1983 †
Abathomphalus intermedius (Bolli, 1951) †
Abathomphalus mayaroensis (Bolli, 1951) †
Abathomphalus salajensis Solakius, 1983 †
Abditodentrix pseudothalmanni (Boltovskoy & Guissani de Kahn, 1981)
Abdullaevia tosbulakensis Suleymanov, 1965 †
Abedinium dasypus (Cachon & Cachon-Enjumet) Loeblich Jr & Loeblich III, 1966
Aberisphaera gambanica Wan, 1991 †
Abollifer globosa Shiratori, Yokoyama & Ishida, 2014
Abollifer prolabens Vørs, 1992
Abrardia catalaunica Bilotte, 1974 †
Abrardia mosae (Hofker, 1955) †
Abratopdinium cardioforme S.Mao & B.A.R.Mohr †
Abratopdinium kerguelense S.Mao & B.A.R.Mohr †
Abriolina mediterranea Luperto, 1964 †
Abuhammadina saidi Abd-Elshafy & Ibrahim, 1990 †
Abyssalia foliformis Gooday & Holzmann, 2020
Abyssalia sphaerica Gooday & Holzmann, 2020
Abyssamina incisa Schnitker & Tjalsma, 1980 †
Abyssamina poagi Schnitker & Tjalsma, 1980 †
Abyssamina quadrata Schnitker & Tjalsma, 1980 †
Abyssotherma pacifica Brönnimann, Van Dover & Whittaker, 1989
Acanthoceras zachariasii (Brun) Simonsen, 1979
Acanthochiasma fusiforme Haeckel, 1861
Acanthochloris bacillifera Pascher, 1938
Acanthochloris brevispinosa Pascher, 1930
Acanthochloris brevispinosa var. brevispinosa Péterfi & Péterfi, 1966
Acanthochloris ingens Margalef, 1956
Acanthochloris scherffelii Pascher, 1938
Acanthochloris verrucosa Ettl, 1977
Acanthocystis aculeata Hertwig & Lesser, 1874 accepted as Choanocystis aculeata (Hertwig & Lesser) Roijackers & Siemensma, 1988
Acanthocystis pelagica Ostenfeld, 1904
Acanthodesmia vinculata Mueller, 1858
Acanthodinium caryophyllum Kofoid, 1907
Acanthodiscus antarcticus Hajós, 1975 †
Acanthodiscus clypeolus (Brun) Van Heurck, 1896 †
Acanthodiscus convexus Hajós & Stradner in Hajós, 1975 †
Acanthodiscus danicus J.Fenner, 1994 †
Acanthodiscus immaculatus (Hanna) V.A.Nikolaev & J.A.Barron in Nikolaev et al., 2001 †
Acanthodiscus ornatus Hajós & Stradner in Hajós, 1975 †
Acanthodiscus paterus (J.A.Long, Fuge & J.Smith) V.A.Nikolajev & Fourt. †
Acanthodiscus rugosus Pant., 1892 †
Acanthodiscus schmidtii Jousé, 1951 †
Acanthodiscus vulcaniformis Jousé, 1951 †
Acanthogonyaulax acanthosphaera (Sargeant) Sargeant †
Acanthogonyaulax paliuros (Sargeant) Sargeant †
Acanthogonyaulax spinifera (Murray & Whitting) H.W.Graham, 1942
Acanthoica acanthifera Lohmann ex Lohmann, 1913
Acanthoica acanthos J.Schiller, 1925
Acanthoica bidentula Lecal-Schlauder, 1951
Acanthoica biscayensis A.Kleijne, 1992
Acanthoica brevispina J.Schiller, 1913 accepted as Acanthoica quattrospina var. brevispina (Schiller) Schiller
Acanthoica coronata Lohmann, 1903
Acanthoica janchenii J.Schiller, 1925
Acanthoica lithostratos J.Schiller, 1926
Acanthoica maxima Heimdal, 1981
Acanthoica monospina J.Schiller, 1925
Acanthoica ornata Conrad, 1928
Acanthoica quattrospina Lohmann, 1903
Acanthoica quattrospina var. brevispina (Schiller) Schiller (uncertain )
Acanthoica rubens Kamptner, 1941
Acanthoica schilleri Conrad, 1928
Acanthoica trispinosa Ostenfeld
Acantholithium dicopum Haeckel, 1887
Acantholithium stellatum Haeckel, 1887
Acanthometra fusca Müller, 1856
Acanthometra pellucida Müller, 1858
Acanthometron elastricum
Acanthometron pellucida Mueller, 1856 accepted as Acanthometron pellucidum Mueller, 1856
Acanthometron pellucidum Mueller, 1856
Acanthonia echinoides (Claparède & Lachmann, 1858) Haeckel, 1881
Acanthoplegma krohni
Acanthosolenia mediterranea F.C.Bernard, 1939
Acanthosphaera actinota Haeckel, 1860
Acanthosphaera castanea Haeckel, 1887
Acanthosphaera dodecastyla Mast, 1910
Acanthosphaera pinchuda Boltovskoy, 1980
Acanthosphaera tenuis Haeckel, 1887
Acanthosphaeridium reticulatum M.Hajós & H.Stradner, 1975 †
Acanthostaurus conacanthus Haeckel, 1887
Acanthostaurus nordgaardi Jørgensen, 1899