A new species of honeycombed Chydorus Leach, 1816 (Cladocera: Anomopoda: Chydoridae) from tundra of North-East Russia.

A new cladoceran of the faviformis-group of the genus Chydorus Leach, 1816 (Cladocera: Chydoridae), characterized by a honeycomb-like sculpture of valves and head shield, is described from tundra lakes and ponds in North-East Russia. Morphology of the new species was studied using optical and scanning electron microscopy. Chydorus izvekovae sp.

New findings of Eurycercus Baird, 1843 (Cladocera: Anomopoda) in the Eastern Palaearctic.

Information on the cladocerans of Eastern Palaerctic is limited, and remote islands of Arctic and Subarctic in this region are among inadequately studied territories, i.e. due to a very limited access to them.