Gastropoda - Trochoidea - Turbinidae
Alternative combination: Monodonta wattsi
Full reference: R. E. Dickerson. 1916. Stratigraphy and fauna of the Tejon Eocene of California. University of California Publications Bulletin of the Department of Geology 9(17):363-524
Belongs to Homalopoma according to R. L. Squires 2008
See also Dickerson 1916, Turner 1938 and Weaver 1942
Sister taxa: Homalopoma (Cantrainea), Homalopoma (Homalopoma), Homalopoma (Leptothyropsis), Homalopoma (Panacochlea), Homalopoma coombsi, Homalopoma degrangei, Homalopoma effingeri, Homalopoma granulosa, Homalopoma paucicostatum, Homalopoma sanguineus, Homalopoma umpquaensis, Homalopoma vancouverensis
Type specimen: UCMP 11828, a shell. Its type locality is UCMP loc. 1853, Marysville Buttes, which is in a Ypresian marine horizon in the Capay Formation of California.
Distribution:
• Eocene of United States (10: California, Oregon, Washington collections)
• Paleocene of United States (1: California)
Total: 11 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.