Anaulus laevis (Grunow in Van Heurck) Boyer, 1900 accepted as
Eunotogramma laeve Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia acuta (Ehrenberg) Boyer, 1900 accepted as
Triceratium acutum Ehrenberg, 1844 (1845) (new combination reference)
Biddulphia americana (Ralfs in Pritchard) Boyer, 1900 accepted as
Triceratium americanum var. americanum Ralfs in Pritchard, 1861 (new combination reference)
Biddulphia antillarum (Cleve) Boyer, 1900 accepted as
Triceratium antillarum var. antillarum Cleve, 1878 (new combination reference)
Biddulphia arctica f. arctica (Brightwell) Boyer, 1900 accepted as
Triceratium arcticum f. arcticum Brightwell, 1853 (new combination reference)
Biddulphia arctica var. californica (Grunow in Schmidt et al.) Boyer, 1900 accepted as
Triceratium arcticum f. californica Grunow in Schmidt et al., 1882 (new combination reference)
Biddulphia arctica var. campeachiana (Grunow in Van Heurck) Boyer, 1900 accepted as
Triceratium arcticum f. campechiana Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia arctica var. kerguelensis (Grunow in Cleve & Grunow) Boyer, 1900 accepted as
Triceratium arcticum var. kerguelense Grunow in Cleve & Grunow, 1880 (new combination reference)
Biddulphia arctica var. montereyi (Brightwell) Boyer, 1900 accepted as
Triceratium montereyi f. montereyi Brightwell, 1853 (new combination reference)
Biddulphia arctica var. pentagona Boyer, 1900 (original description)
Biddulphia arctica var. quadrangularis (Greville) Boyer, 1900 accepted as
Triceratium quadrangulare Greville, 1865 (new combination reference)
Biddulphia arctica var. sexangulata Boyer, 1900 (original description)
Biddulphia balaena (Ehrenberg) T.Brightwell accepted as
Zygoceros balaena Ehrenberg, 1853 (new combination reference)
Biddulphia biddulphiana var. biddulphiana (J.E. Smith) Boyer, 1900 (new combination reference)
Biddulphia biquadrata (Janisch in Schmidt et al.) Boyer, 1900 accepted as
Triceratium biquadratum Janisch, 1886 (new combination reference)
Biddulphia californica (Schmidt) Boyer, 1901 accepted as
Cerataulus californicus Schmidt in Schmidt et al., 1888 (new combination reference)
Biddulphia campeachiana (Grunow) Boyer, 1900 accepted as
Triceratium campechianum Grunow in Cleve, 1878 (new combination reference)
Biddulphia condecora (Ehrenberg) Boyer, 1900 accepted as
Triceratium condecorum var. condecorum Ehrenberg, 1844 (1845) (new combination reference)
Biddulphia consimilis (Grunow in Van Heurck) Boyer, 1900 accepted as
Triceratium consimile Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia convexiuscula (Grunow in Schmidt et al.) Boyer, 1900 accepted as
Triceratium convexiusculum Grunow in Schmidt et al., 1890 (new combination reference)
Biddulphia costulata (Grunow in Schmidt et al.) Boyer, 1900 accepted as
Triceratium tumidum var. costulata Grunow in Schmidt et al., 1882 (new combination reference)
Biddulphia elegans (Greville) Boyer, 1900 accepted as
Amphitetras elegans Greville, 1866 (new combination reference)
Biddulphia grandis (Brightwell) Boyer, 1900 accepted as
Triceratium grande f. grande Brightwell, 1853 (new combination reference)
Biddulphia hebetata (Grunow in Van Heurck) Boyer, 1900 accepted as
Triceratium irregulare var. hebetata Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia heilpriniana (Kain & E.A. Schultze) Boyer, 1900 accepted as
Triceratium heilprinianum Kain & Schultze, 1889 (new combination reference)
Biddulphia heteropora (Grunow in Van Heurck) Boyer, 1900 accepted as
Triceratium heteroporum Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia inelegans var. araeopora (Grunow in Van Heurck) Boyer, 1900 accepted as
Triceratium inelegans var. araepora Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia inelegans var. inelegans (Greville) Boyer, 1900 accepted as
Triceratium inelegans var. inelegans Greville, 1866 (new combination reference)
Biddulphia inelegans var. jucatensis (Grunow in Schmidt) Boyer, 1883 accepted as
Triceratium jucatense Grunow in Schmidt et al., 1882 (new combination reference)
Biddulphia inelegans var. micropora (Grunow in Van Heurck) Boyer, 1883 accepted as
Triceratium inelegans var. micropora Grunow in A. Schmidt, 1888 (new combination reference)
Biddulphia interpunctata (Grunow in Schmidt et al.) Boyer, 1900 accepted as
Triceratium interpunctatum Grunow in Schmidt et al., 1882 (new combination reference)
Biddulphia kainii (E.A. Schultze in Kain & E.A. Schultze) Boyer, 1900 accepted as
Triceratium kainii E.A.Schultze in Kain & Schultze, 1889 † (new combination reference)
Biddulphia obtusa (Ehrenberg) Boyer, 1901 accepted as
Triceratium obtusum f. obtusum Ehrenberg, 1844 (new combination reference)
Biddulphia orbiculata (Shadbolt) Boyer, 1900 accepted as
Triceratium orbiculatum var. orbiculatum Shadbolt, 1854 (new combination reference)
Biddulphia ovalis (Schmidt in Schmidt et al.) Boyer, 1900 accepted as
Cerataulus ovalis Schmidt in Schmidt et al., 1888 (new combination reference)
Biddulphia parvula (Janisch & Rabenhorst) Boyer, 1900 accepted as
Amphitetras parvula Janisch & Rabenhorst, 1863 (new combination reference)
Biddulphia pentacrinus (Ehrenberg) Boyer, 1901 accepted as
Amphipentas pentacrinus Ehrenberg, 1841 † (new combination reference)
Biddulphia quadricornis (Grunow) Boyer, 1901 accepted as
Zygoceros quadricornis Grunow in Van Heurck, 1883 (new combination reference)
Biddulphia reticulum (Ehrenberg) Boyer, 1900 accepted as
Triceratium reticulum f. reticulum Ehrenberg, 1844 (new combination reference)
Biddulphia robertsiana f. robertsiana (Greville) Boyer, 1900 accepted as
Triceratium robertsianum Greville (new combination reference)
Biddulphia semicircularis var. semicircularis (Brightwell) Boyer, 1900 accepted as
Triceratium semicirculare var. semicirculare Brightwell, 1853 (new combination reference)
Biddulphia spinosa (J.W.Bailey) Boyer, 1927 accepted as
Triceratium spinosum f. spinosum J.W. Bailey, 1844 (new combination reference)
Biddulphia subrotundata (Schmidt in Schmidt et al.) Boyer, 1900 accepted as
Triceratium subrotundatum f. subrotundatum Schmidt in Schmidt et al., 1886 (new combination reference)
Biddulphia tabellaria (Brightwell) Boyer, 1900 accepted as
Triceratium tabellarium var. tabellarium Brightwell, 1856 (new combination reference)
Biddulphia tabellarium (T.Brightwell) C.S.Boyer, 1900 † accepted as
Entogoniopsis tabellaria (T.Brightwell) J.Witkowski, P.A.Sims, N.I.Strelnikova & D.M.Williams, 2015 (new combination reference)
Biddulphia tessellata (Greville) Boyer, 1900 accepted as
Triceratium tessellatum Greville, 1861 (new combination reference)
Biddulphia testudo (Brun in Brun & Tempère) Boyer, 1900 accepted as
Tabulina testudo Brun in Brun & Tempère, 1889 † (new combination reference)
Biddulphia thumii (Schmidt in Schmidt et al.) Boyer, 1900 accepted as
Cerataulus thumii Schmidt in Schmidt et al., 1888 (new combination reference)
Biddulphia trisulca (J.W. Bailey ex Ralfs in Pritchard) Boyer, 1900 accepted as
Triceratium trisulcum var. trisulcum J.W. Bailey ex Ralfs in Pritchard, 1861 (new combination reference)
Biddulphia vesiculosa (Agardh) Kützing, 1833 accepted as
Diatoma vesiculosum Agardh, 1824 (new combination reference)
Hemiaulus solenoceros (Ehrenberg) Boyer, 1900 accepted as
Triceratium solenoceros var. solenoceros Ehrenberg, 1844 (1845) (new combination reference)
Triceratium arcticum f. pentagona [no author] according to Boyer (taxonomy source)
Triceratium arcticum var. sexangulatum ‘J. A. Schulze' Boyer (taxonomy source)