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Type: Article
Published: 2022-06-14
Page range: 198-210
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A new species of honeycombed Chydorus Leach, 1816 (Cladocera: Anomopoda: Chydoridae) from tundra of North-East Russia

Department of Invertebrate Zoology, Biological Faculty, M.V. Lomonosov Moscow State University, Leninskie Gory 1–12, Moscow 119991, Russia. A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia.
A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia. 3Department of General Ecology and Hydrobology, Biological Faculty, M.V. Lomonosov Moscow State University, Leninskie Gory 1–12, Moscow 119991, Russia.
A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia. 3Department of General Ecology and Hydrobology, Biological Faculty, M.V. Lomonosov Moscow State University, Leninskie Gory 1–12, Moscow 119991, Russia
Crustacea Chydorus faviformis-group new species morphology systematics 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. nov. differs from all other species of the faviformis-group in a narrow labral keel with elongated apex, and in a greater number of meshes on the valves and head shield. Other species of the faviformis-group in the Western Hemisphere are distributed in the tropical-subtropical zone, they also inhabit mostly shallow waters with well-developed macrophyte zone.



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