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 |