•  
  •  
 

Article Title

A New Species of Fossil Nuttallia (Mollusca: Bivalvia) from the Pliocene of Sonoma County, California

Volume

73

Issue

3

First Page

140

Last Page

146

Abstract

Nuttallia jamesi, new species, is described from strata assigned Pliocene age in the Sebastopol quadrangle, central Sonoma County, California. The species is similar to N. nuttallii (Conrad), late Miocene to Recent of California and Baja California, and to N. olivacea (Jay), Miocene to Recent of Japan, but differs from both in having an acuminate posterior end. The genus Nuttallia is restricted, in both Recent and fossil occurrence, to the north Pacific basin. It represents a temperately adapted branch of the predominantly tropical Sanguinolariinae.