†Borysthenia goldfussiana is an extinct species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Valvatidae...
1 KB (59 words) - 00:32, 2 March 2021
aperture of Borysthenia is not circular. Animals are ovoviviparous. The genus Borysthenia contains the following species: † Borysthenia goldfussiana (Wüst,...
2 KB (144 words) - 22:50, 1 March 2021