- Republic, Slovakia, France, Italy, Morocco,
Spain and Russia.
Holcodiscus mediocostatus Tzankov, 1935, Barremian, Razgrad, Cr1 1716 (Coll. V. Tzankov) at the...
- Hauterivian,
Shumen Province, (Coll. V.Tzankov) at the
SUMPHG Holcodiscus mediocostatus Tzankov, 1935, Barremian, Razgrad, Cr1 1716 (Coll. V. Tzankov) at the...
- form †Siphonodella †Siphonodella
duplicata †Skenidioides †Skenidioides
mediocostatus – type
locality for
species †Skenidioides
transversus – type locality...