Blodgett, R. B.; Frýda, J.; Lenz, A. C. (2001). Semitubina yukonensis new species, first occurrence of this biogeographically distinctive Old World Realm gastropod genus in the Lower Devonian of the western hemisphere. Journal of Paleontology. 75(2): 466-470.
Semitubina yukonensis new species, first occurrence of this biogeographically distinctive Old World Realm gastropod genus in the Lower Devonian of the western hemisphere