Traits Taxon list
Aaptotoichus Loeblich & Tappan, 1982 †
Aaptotoichus challengeri Holbourn & Kaminski, 1995 †
Aaptotoichus clavellatus (Loeblich & Tappan, 1946) †
Aaptotoichus mutinensis Haig & McCartain, 2010 †
Aaptotoichus quinnaniensis Haig, 2003 †
Aaptotoichus vallis (Trifonova, 1967) †
Abadehella Okimura & Ishii, 1975 †
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 Vachard in Krainer, Vachard & Schaffhauser, 2019 †
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) †
Abathomphalinae Pessagno, 1967 †
Abathomphalus Bolli, Loeblich & Tappan, 1957 †
Abathomphalus asteroidalis Salaj, 1983 †
Abathomphalus intermedius (Bolli, 1951) †
Abathomphalus mayaroensis (Bolli, 1951) †
Abathomphalus salajensis Solakius, 1983 †
Abditodentrix Patterson, 1985
Abditodentrix pseudothalmanni (Boltovskoy & Guissani de Kahn, 1981)
Abdullaevia Suleymanov, 1965 †
Abdullaevia tosbulakensis Suleymanov, 1965 †
Aberisphaera Wan, 1991 †
Aberisphaera gambanica Wan, 1991 †
Abollifer Vørs, 1992
Abollifer globosa Shiratori, Yokoyama & Ishida, 2014
Abollifer prolabens Vørs, 1992
Abrardia Neumann & Damotte, 1960 †
Abrardia catalaunica Bilotte, 1974 †
Abrardia mosae (Hofker, 1955) †
Abriolina Luperto, 1964 †
Abriolina mediterranea Luperto, 1964 †
Abriolinidae Zaninetti & Rettori in Zaninetti et al., 1992 †
Abuhammadina Abd-Elshafy & Ibrahim, 1990 †
Abuhammadina saidi Abd-Elshafy & Ibrahim, 1990 †
Abyssalia Gooday & Holzmann, 2020
Abyssalia foliformis Gooday & Holzmann, 2020
Abyssalia sphaerica Gooday & Holzmann, 2020
Abyssamina Schnitker & Tjalsma, 1980 †
Abyssamina incisa Schnitker & Tjalsma, 1980 †
Abyssamina poagi Schnitker & Tjalsma, 1980 †
Abyssamina quadrata Schnitker & Tjalsma, 1980 †
Abyssotherma Brönnimann, Van Dover & Whittaker, 1989
Abyssotherma pacifica Brönnimann, Van Dover & Whittaker, 1989
Acantharia
Acantharia incertae sedis (temporary name )
Acanthochiasma Krohn, 1861
Acanthochiasma fusiforme Haeckel, 1861
Acanthochiasmidae Haeckel, 1862
Acanthocollidae Schewiakoff, 1926
Acanthodesmia Müller, 1857
Acanthodesmia vinculata Mueller, 1858
Acantholithium Haeckel
Acantholithium dicopum Haeckel, 1887
Acantholithium stellatum Haeckel, 1887
Acanthometra J. Müller, 1856
Acanthometra fusca Müller, 1856
Acanthometra pellucida Müller, 1858
Acanthometridae Haeckel, 1887
Acanthometron Haeckel, 1887
Acanthometron elastricum
Acanthometron pellucida Mueller, 1856 accepted as Acanthometron pellucidum Mueller, 1856
Acanthometron pellucidum Mueller, 1856
Acanthonia Haeckel, 1881
Acanthonia echinoides (Claparède & Lachmann, 1858) Haeckel, 1881
Acanthonida
Acanthoplegma
Acanthoplegma krohni
Acanthoplegmidae Schewiakoff, 1926
Acanthosphaera Ehrenberg, 1858
Acanthosphaera actinota Haeckel, 1860
Acanthosphaera castanea Haeckel, 1887
Acanthosphaera dodecastyla Mast, 1910
Acanthosphaera pinchuda Boltovskoy, 1980
Acanthosphaera tenuis Haeckel, 1887
Acanthostaurus Haeckel, 1862
Acanthostaurus conacanthus Haeckel, 1887
Acanthostaurus nordgaardi Jørgensen, 1899
Acanthostaurus pallidus (Claparède & Lachmann, 1858) Haeckel, 1862
Acanthostaurus purpurascens Haeckel
Acarinina Subbotina, 1953 †
Acarinina acarinata Subbotina, 1953 † accepted as Acarinina nitida (Martin, 1943) †
Acarinina africana (El-Naggar, 1966) †
Acarinina alticonica Fleisher, 1974 †
Acarinina angulosa (Bolli, 1957) †
Acarinina aquiensis (Loeblich & Tappan, 1957) †
Acarinina aspensis (Colom, 1954) †
Acarinina bollii Shikhlinsky, 1988 †
Acarinina boudreauxi Fleisher, 1974 †
Acarinina bucharensis Khasina, 1972 †
Acarinina bullbrooki (Bolli, 1957) †