Images of Watinoceras hattini from Cobban (1988; USGS Bulletin 1788; public domain).Watinoceras hattini from the Cenomanian to Turonian Greenhorn Limestone of Ellsworth County, Kansas (KUMIP 292444). Watinoceras hattini from the Turonian Greenhorn Limestone Fm. of Washington County, Kansas (KUMIP 219870).