Ctenobolbina
Ctenobolbina ventrispinifera
Photo from Warshauer and Berdan, 1982
Scale bar is 1 mm
Middle lobe more or less completely confluent with the posterior lobe, the composite lobe bulbous and sharply defined in front by a deep curved sulcus; the anterior lobe divided by an oblique furrow. Free edges with the false border or frill (Bassler and Kellett, 1934).
Species
Ctenobolbina alata Ulrich, 1890
Occurrence: McMicken
Reference: Warshauer and Berdan, 1982
Ctenobolbina bispinosa Ulrich, 1890
Occurrence: McMicken
Reference: Warshauer and Berdan, 1982
Ctenobolbina ciliata (Emmons, 1855)
Occurrence: Fulton, Economy, Southgate, McMicken
Reference: Warshauer and Berdan, 1982
Ctenobolbina curta (Ulrich)
Occurrence: McMicken
Reference: Dalvé, 1948
Ctenobolbina duryi (Miller)
Occurrence: Corryville, Mount Auburn
Reference: Dalvé, 1948
Ctenobolbina hammelli (Miller and Faber, 1894)
Occurrence: Arnheim, Waynesville, Liberty
Reference: Dalvé, 1948; Bassler and Kellett, 1934
Ctenobolbina ventrispinifera Warshauer and Berdan, 1982
Occurrence: Clays Ferry
Reference: Warshauer and Berdan, 1982
