(ofBiddulphia petrolia Hanna, 1927)Hanna, G D. (1927). The lowest known Tertiary diatoms in California. <em>Journal of Paleontology.</em> 1(2): 103-127. page(s): p. 110; pl. 19, fig. 7 [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. (2025). DiatomBase. Meretrosulus petrolia (Hanna) Hanna, 1931. Accessed at: https://www.diatombase.org/aphia.php?p=taxdetails&id=960924 on 2026-09-21
original description(ofBiddulphia petrolia Hanna, 1927)Hanna, G D. (1927). The lowest known Tertiary diatoms in California. <em>Journal of Paleontology.</em> 1(2): 103-127. page(s): p. 110; pl. 19, fig. 7 [details]
new combination referenceHanna, G D. (1931). Diatoms and silicoflagellates of the Kreyenhagen shale. <em>Mining in California. California Division of Mines Report of the State Mineralogist.</em> 27(2): 187-201. page(s): p. 192; pl. A, fig. 2 [details]