Subgenus

Sigmoopsis (Sigmoopsis) Henningsmoen, 1953

Images
TUG 1120-19
Sigmoopsis (Sigmoopsis) cornuta | Ceratopsis platyceras n. sp.
Kukruse Stage | CII holotype
GIT 138-301 Uhaku Stage
TUG 1610-46
Sigmoopsis (Sigmoopsis) cornuta | Sigmoopsis cornuta
Keila Stage | DII