World Register of Marine Species (WoRMS)
Hemithecella abrupta Stinchcomb & Darrough, 1995
MolluscaBase eds. (2026). MolluscaBase. Hemithecella abrupta Stinchcomb & Darrough, 1995&nbsp;&#8224;. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1892369 on 2026-08-28
Stinchcomb, B. L. & Darrough, G. (1995). Some molluscan Problematica from the Upper Cambrian-Lower Ordovician of the Ozark uplift. Journal of Paleontology. 69(1): 52–65.