Taxa named by Karl Eichwald

species of reptile

species of fish

species of reptile

species of arachnid

species of reptile

Deuterosaurus is an extinct genus of dinocephalian therapsids, one of the non-mammalian synapsids dominating the land during the late Paleozoic.

species of reptile

species of mollusc

Adacna is a genus of fresh- and brackish-water bivalve molluscs of the cockle family (Cardiidae). It includes species characterized by thin shells, with flattened ribs and usually rather deep pallial sinus. The four extant species are found in fresh- and brackish-water lakes of the Danube Delta, estuaries (limans) of the north-western Black Sea, the Taganrog Bay of the Sea of Azov and the Caspian Sea. Two Caspian species were also present in the Aral Sea, where they went extinct by the end of the 1970s as the lake was shrinking and became more saline. Two fossil species have been described fro

Didacna is a genus of brackish-water bivalve molluscs of the cockle family (Cardiidae) characterized by rounded-triangular, oval or trapezoidal shells with flattened ribs. It includes about 90 accepted species, 9 of which are extant and endemic to the Caspian Sea. The genus presumably originated in the Black Sea and the Caspian Sea basins during the Pleistocene around 900,000 years ago. However, several fossil species from older deposits outside of those basins have also sometimes been classified within this genus. These cockles are sedentary filter feeders that bury into the sediment and feed