World Register of Marine Species (WoRMS)
Roubidouxia umbilicata Ulrich & Bridge, 1932
MolluscaBase eds. (2026). MolluscaBase. Roubidouxia umbilicata Ulrich & Bridge, 1932&nbsp;&#8224;. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1791140 on 2026-08-30
Dake, C. L.; Bridge, J. (1932). Faunal Correlation of the Ellenburger Limestone of Texas. Geological Society of America Bulletin. 43(3): 725-748.