Genus

Sigmoopsis Henningsmoen, 1953


TUG 1120-19	Sigmoopsis (Sigmoopsis) cornuta \| Ceratopsis platyceras n. sp.	Kohtla-Järve	Kukruse Stage \| CII	holotype
GIT 137-16	Sigmoopsis granulata \| Ceratopsis granulata	Rakvere vabaduse plats	Oandu Stage	holotype
GIT 137-17	Sigmoopsis granulata \| Ceratopsis granulata	Oandu	Oandu Stage
GIT 137-18	Sigmoopsis granulata \| Ceratopsis granulata	Oandu	Oandu Stage
GIT 137-19	Sigmoopsis granulata \| Ceratopsis granulata	Oandu	Oandu Stage
GIT 138-216	Sigmoopsis lamina	Alliku ditches, Harjumaa	Jõhvi Substage	holotype
GIT 138-217	Sigmoopsis rostrata	Alliku ditches, Harjumaa	Jõhvi Substage
GIT 138-218	Sigmoopsis granulata	Rakvere	Oandu Stage
GIT 138-219	Sigmoopsis granulata	Rakvere	Oandu Stage
GIT 141-12	Sigmoopsis rostrata \| Sigmoopsis rostrata (Krause, 1892)	Oandu	Keila Stage