... ), Tuscan Springs, California, ventral, dorsal, left-lateral, and apical views. (H–J) RBCM.EH2013.032.0001.001, western Denman Island, ventral, dorsal, and left-lateral views of dorso-ventrally crushed specimen. (K, L) Hypotype RBCM.EH2004.012.0706, Big Sucia Island, ventral and left-lateral views. (M...

... the Pacific Coast of North America ( Fig. 1 ), where each locality included one or more measured stratigraphic sections. Some of these localities, such as Big Chico Creek in northern California and Sucia Island in Washington State, are classic localities that have a long history of collection and study...

.... We then use this method to test hypotheses of phyletic evolutionary change in B . inornatus specimens collected from Sucia Island, Washington, USA, and Punta San Jose, Baja California, Mexico. The greatest observed character change is in mature shell size: baculitids from the older of the two...

...-diagnostic ammonites from the Sucia Island beds include Hoplitoplacenticeras vancouverense, the zonal index fossil, as well as Canadoceras newberryanum and Desmophyllites diphylloides . Baculites subanceps is also found at the very top of the section on Big Sucia Island. The co-occurring ammonites...

...) , but Eripachya jalama and Calkota daileyi were not recognized as new species. Pentzia , established for Fulgur hilgardi White, 1889 , is common and found from Sucia Island, Washington, southward to northern Baja California, Mexico. Most of the new taxa were discovered while examining the extensive...

... (both paralectotypes missing), Chico Formation, Tuscan Springs, Tehama County, California. Of Glycymeris suciensis McLellan, 1927 , holotype UWBM 15008 and paratype UWBM 15009, Cedar District Formation, Sucia Island, San Juan County, Washington. Of Cucullaea suciensis McLellan, 1927 , holotype UWBM...