(ofTriceratium biquadratum Janisch, 1886)Schmidt, A. (1886). Atlas der Diatomaceen-kunde. <em>Aschersleben, Commissions-Verlag Von Ludwig Siever's Buchandlung.</em> Series III (Heft 25): pls. 97-99. page(s): pl. 98, fig. 4-6 [details]
Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2026). DiatomBase. Biddulphia biquadrata (Janisch in Schmidt et al.) Boyer, 1900. Accessed at: https://www.diatombase.org/aphia.php?p=taxdetails&id=631129 on 2026-08-10
original description(ofTriceratium biquadratum Janisch, 1886)Schmidt, A. (1886). Atlas der Diatomaceen-kunde. <em>Aschersleben, Commissions-Verlag Von Ludwig Siever's Buchandlung.</em> Series III (Heft 25): pls. 97-99. page(s): pl. 98, fig. 4-6 [details]
new combination referenceBoyer, C.S. (1900). The Biddulphoid forms of North American Diatomaceae. Proceedings of the Academy of Natural Sciences of Philadelphia, 1900: 685-748 page(s): p. 717 [details]