Traits Taxon list
Alveoflexus firthii Hendey & Sims, 1984 † (uncertain > unassessed )
Ancoropsis eocenica Hendey & Sims, 1984 † (uncertain > unassessed )
Arcusidiscus oppositus S.Komura, 2008 †
Biddulphia abjecta Mann, 1925 (uncertain > unassessed )
Biddulphia abyssorum (uncertain > unassessed )
Biddulphia abyssorum var. abyssorum Grunow in Van Heurck, 1883 (uncertain > unassessed )
Biddulphia abyssorum var. polycistinorum ‘Pantocsek' Mills, 1933 (uncertain > unassessed )
Biddulphia abyssorum var. saratovianum (Pantocsek) F.W. Mills, 1933 accepted as Triceratium abyssorum var. saratovianum Pantocsek, 1889
Biddulphia acanthoceros Forti, 1913 (uncertain > unassessed )
Biddulphia acuta (Ehrenberg) Boyer, 1900 accepted as Triceratium acutum Ehrenberg, 1844 (1845)
Biddulphia advena VanLandingham, 1968 (uncertain > unassessed )
Biddulphia affinis (Grunow in Van Heurck) Van Heurck, 1909 accepted as Triceratium affine Grunow in Van Heurck, 1883
Biddulphia africana Leuduger-Fortmorel, 1898 (uncertain > unassessed )
Biddulphia agulhas Karsten, 1905 (uncertain > unassessed )
Biddulphia alaskiensis Mann, 1907 (uncertain > unassessed )
Biddulphia alternans (Bailey) Van Heurck, 1885 accepted as Trigonium alternans (Bailey) A.Mann, 1907 accepted as Triceratium alternans f. alternans J.W. Bailey, 1851
Biddulphia alternans var. alternans (J.W. Bailey) Van Heurck, 1885 accepted as Triceratium alternans f. alternans J.W. Bailey, 1851
Biddulphia alternans var. tenuipunctata Mereschkowsky, 1902 (uncertain > unassessed )
Biddulphia alternans var. variabilis (Brightwell) Mereschkowsky, 1900 accepted as Triceratium variable Brightwell, 1856
Biddulphia americana (Ralfs in Pritchard) Boyer, 1900 accepted as Triceratium americanum var. americanum Ralfs in Pritchard, 1861
Biddulphia amphicephala (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Odontella amphicephala Ehrenberg, 1845
Biddulphia angulata Schmidt in Schmidt et al., 1888 (uncertain > unassessed )
Biddulphia antarctica (Ehrenberg) M. Peragallo, 1897 accepted as Hemiaulus antarcticus Ehrenberg, 1844
Biddulphia antarctica ‘Cleve' Mills (uncertain > unassessed )
Biddulphia antarctica f. typica ‘Meunier' VanLandingham (uncertain > unassessed )
Biddulphia antediluviana (Ehrenberg) Van Heurck, 1885
Biddulphia antediluviana ‘Azpeitia y Moros' Mills, 1911 (uncertain > unassessed )
Biddulphia antediluviana var. antediluviana (Ehrenberg) Van Heurck, 1885 accepted as Amphitetras antediluviana var. antediluviana Ehrenberg, 1840
Biddulphia antediluviana var. cruciformis ‘W. Smith' according to Mills (uncertain > unassessed )
Biddulphia antediluviana var. excavata "Adam's Collection" according to Mills (uncertain > unassessed )
Biddulphia antediluviana var. excavata Frenguelli, 1945 (uncertain > unassessed )
Biddulphia antediluviana var. minor (H. Peragallo & M. Peragallo) F.W. Mills accepted as Amphitetras antediluviana var. minor Peragallo & Peragallo, 1902
Biddulphia antediluviana var. minutum (Greville) F.W. Mills, 1933 accepted as Amphitetras minuta Greville, 1861
Biddulphia antediluviana var. nobilis “Adam's Collection” according to F.W. Mills (uncertain > unassessed )
Biddulphia antediluviana var. ornata Hendey, 1971 (uncertain > unassessed )
Biddulphia antediluviana var. pentagona (Hustedt) F.W. Mills, 1933 accepted as Triceratium antediluvianum f. pentagona Hustedt, 1930
Biddulphia antediluviana var. tesselata (Shadbolt) F.W. Mills, 1933 accepted as Amphitetras tessellata Shadbolt, 1854
Biddulphia antediluviana var. trigona (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1933 accepted as Triceratium antediluvianum var. trigona M. Peragallo in Peragallo & Peragallo, 1911
Biddulphia anthropomorpha Van Heurck, 1909 (uncertain > unassessed )
Biddulphia antillarum (Cleve) Boyer, 1900 accepted as Triceratium antillarum var. antillarum Cleve, 1878
Biddulphia antiqua Truan y Luard & Witt, 1888 (uncertain > unassessed )
Biddulphia apiculata J.A.Long, Fuge & Js.Smith bis, 1946
Biddulphia apiculata Long, Fuge & Smith, 1946 (uncertain > unassessed )
Biddulphia arcuata (Shadbolt) F.W. Mills, 1933 accepted as Triceratium arcuatum Shadbolt, 1854
Biddulphia areolata Hajós, 1968 (uncertain > unassessed )
Biddulphia argus Boyer, 1898 (uncertain > unassessed )
Biddulphia armata Leuduger-Fortmorel, 1879 (uncertain > unassessed )
Biddulphia astrolabensis Hendey, 1937 (uncertain > unassessed )
Biddulphia auliscoformis Strelnikova, 1964 (uncertain > unassessed )
Biddulphia australis Montagne, 1842 (uncertain > unassessed )
Biddulphia azorica J.Pavillard, 1908 (uncertain > unassessed )
Biddulphia baileyii W. Smith, 1856 (uncertain > unassessed )
Biddulphia balaena (Ehrenberg) T.Brightwell accepted as Zygoceros balaena Ehrenberg, 1853
Biddulphia balaena f. campechiana Grunow in Van Heurck, 1883 (uncertain > unassessed )
Biddulphia balaena var. arctica Peragallo & Peragallo, 1902 (uncertain > unassessed )
Biddulphia balaena var. balaena (Ehrenberg) Brightwell, 1859 accepted as Zygoceros balaena Ehrenberg, 1853
Biddulphia baldjikii Girard (uncertain > unassessed )
Biddulphia balearica (Cleve & Grunow) A.Mann, 1925 accepted as Triceratium balearicum f. balearicum Cleve & Grunow in Cleve, 1881
Biddulphia baltzoi Hanna, 1970 (uncertain > unassessed )
Biddulphia barbadensis Greville, 1866 (uncertain > unassessed )
Biddulphia belgicae M.Peragallo
Biddulphia belgicae var. belgicae M. Peragallo, 1921 (uncertain > unassessed )
Biddulphia belgicae var. lata M. Peragallo, 1921 (uncertain > unassessed )
Biddulphia bicorne Cleve, 1878 (uncertain > unassessed )
Biddulphia bicornis Cleve, 1878 (uncertain > unassessed )
Biddulphia biddulphiana (J.E.Smith) Boyer, 1900
Biddulphia biddulphiana var. abnormis Boyer, 1927 (uncertain > unassessed )
Biddulphia biddulphiana var. biddulphiana (J.E. Smith) Boyer, 1900 (uncertain > unassessed )
Biddulphia bifasciata Wigand, 1860 (uncertain > unassessed )
Biddulphia bifenestra Brun, 1896 (uncertain > unassessed )
Biddulphia bipons ‘Ehrenberg' Mills, 1933 (uncertain > unassessed )
Biddulphia biquadrata (Janisch in Schmidt et al.) Boyer, 1900 accepted as Triceratium biquadratum Janisch, 1886
Biddulphia birostrata Grunow, 1863 (uncertain > unassessed )
Biddulphia birostrum Brun, 1891 (uncertain > unassessed )
Biddulphia blanda Schmidt in Schmidt et al., 1888 (uncertain > unassessed )
Biddulphia boryana ‘Pantocsek' Mills, 1933 (uncertain > unassessed )
Biddulphia brachiolatum (Brightwell) Taylor, 1970 accepted as Triceratium brachiolatum Brightwell, 1853
Biddulphia brevis Ehrenberg, 1845 (uncertain > unassessed )
Biddulphia brittoniana C.H.Kain & E.A.Schultze, 1889 † (uncertain > unassessed )
Biddulphia broeckii (Leuduger-Fortmorel) Mann, 1925 accepted as Triceratium broeckii Leuduger-Fortmorel, 1879
Biddulphia calamus Tempère & Brun, 1889 † (uncertain > unassessed )
Biddulphia calamus var. glabra Tsumura, 1969 (uncertain > unassessed )
Biddulphia californica (Schmidt) Boyer, 1901 accepted as Cerataulus californicus Schmidt in Schmidt et al., 1888
Biddulphia campeachiana (Grunow) Boyer, 1900 accepted as Triceratium campechianum Grunow in Cleve, 1878
Biddulphia capuzina Schmidt, 1888 (uncertain > unassessed )
Biddulphia caraibica Truan y Luard & Witt, 1888 (uncertain > unassessed )
Biddulphia castellifera (Grunow) Mann, 1925 accepted as Triceratium castelliferum A.Grunow, 1888 † accepted as Sheshukovia castellifera (A.Grunow) J.Witkowski, 2022 †
Biddulphia catenata Schussnig, 1915 (uncertain > unassessed )
Biddulphia cayennensis Ehrenberg, 1854 (uncertain > unassessed )
Biddulphia centralis Boyer, 1922 (uncertain > unassessed )
Biddulphia challengerii Tsumura, 1969 (uncertain > unassessed )
Biddulphia chinensis Greville, 1866 (uncertain > unassessed )
Biddulphia cingulata Mann, 1925 (uncertain > unassessed )
Biddulphia circinus (Bailey) Van Heurck, 1896 accepted as Zygoceros circinus var. circinus J.W. Bailey, 1854
Biddulphia cirrus Ehrenberg, 1847 (uncertain > unassessed )
Biddulphia clavulata Ehrenberg, 1861 (uncertain > unassessed )
Biddulphia clypeolus Boyer, 1922 (uncertain > unassessed )
Biddulphia concava Mann, 1925 (uncertain > unassessed )
Biddulphia concinnus Van Heurck, 1896 (uncertain > unassessed )
Biddulphia condecora (Ehrenberg) Boyer, 1900 accepted as Triceratium condecorum var. condecorum Ehrenberg, 1844 (1845)