The genus Vesperispira (Gastropoda: Pleurotomarioidea) from the Permian of two displaced terranes, western United States
Yancey, Thomas E., Strong, Ellen E., Hanger, Rex A.Volume:
74
Journal:
Journal of Paleontology
DOI:
10.1017/s0022336000032844
Date:
July, 2000
File:
PDF, 1.60 MB
2000