Family

Geisonoceratidae Zhuravleva, 1959


TUG 1250-2	Ordogeisonoceras	Lüganuse quarry	Lasnamägi Stage \| CIb
GIT 222-661	Ordogeisonoceras	Vasalemma (old) quarry	Keila Stage
GIT 222-667	Ordogeisonoceras tartuensis	Vasalemma (old) quarry	Keila Stage
GIT 225-1053	Nilssonoceras	Osmussaar
TUG 3-349	Ordogeisonoceras amplicameratum \| Ordogeisonoceras amplicameratum (Hall, 1847)	Kehra	Keila Stage
TUG 3-406-2	Ordogeisonoceras amplicameratum \| Ordogeisonoceras amplicameratum (Hall, 1847)	Rakvere	Rakvere Stage
TUG 939-10	Ordogeisonoceras tartuensis	Vasalemma outcrop	Oandu Stage \| Vasalemma kihistu	holotype
TUG 939-1065-1	Ordogeisonoceras tartuensis	Vasalemma outcrop Vasalemma raudtee äärne paemurd	Oandu Stage
TUG 939-1065-2	Ordogeisonoceras tartuensis	Vasalemma outcrop Vasalemma raudtee äärne paemurd	Oandu Stage
TUG 939-1065-3	Ordogeisonoceras tartuensis	Vasalemma outcrop Vasalemma raudtee äärne paemurd	Oandu Stage