Genus

Severobolbina Schallreuter, 1974


GIT 138-40	Severobolbina elliptica	Jõhvi-Paemurru quarry		Idavere Substage
GIT 141-10	Severobolbina elliptica	Alliku ditches, Harjumaa		Jõhvi Substage
GIT 141-11	Severobolbina severa \| Carinobolbina severa Sarv, 1959	Alliku ditches, Harjumaa		Jõhvi Substage
GIT 657-2	Severobolbina severa	Lipu 6301 borehole	25.13 - 25.22	Idavere Substage
GIT 657-22	Severobolbina severa	Lipu 6301 borehole	26.84 - 26.9	Kukruse Stage