Trematis
Circular to suboval shells covered in systematically arranged pits.
Species
Trematis crassipunctata Ulrich, 1889
Occurrence: Fairmount
Reference: Foerste, 1916; Dalvé, 1948
Trematis dyeri Miller
Occurrence: Fairmount
Reference: Dalvé, 1948
Trematis fragilis Ulrich, 1889
Occurrence: Unknown
Reference: Foerste, 1916
Trematis millipunctata Hall
Occurrence: Fulton, Economy, Southgate, McMicken, Mount Hope, Fairmount, Bellevue, Corryville, Mount Auburn, Arnheim, Waynesville, Liberty, Whitewater, Elkhorn
Reference: Schwimmer and Sandy, 1996
Trematis oblata Ulrich
Occurrence: Fairmount
Reference: Dalvé, 1948
Trematis quincuncialis Miller & Dyer
Occurrence: Waynesville
Reference: Dalvé, 1948
Trematis reticularis (Miller)
Occurrence: Arnheim, Waynesville, Liberty, Elkhorn
Reference: Dalvé, 1948
Trematis umbonata Ulrich
Occurrence: Corryville
Reference: Dalvé, 1948