First Record of the Siberian Diaptomus Leptodiaptomus cf. angustilobus (Copepoda: Calanoida) in Europe
V. S. Zhikhareva, *, E. B. Fefilovab, M. A. Tereshinac,
O. P. Dubovskayad, e, D. E. Gavrilkoa, and G. V. Shurganovaa
a Department of Ecology, Institute of Biology and Biomedicine, Lobachevsky State University, Nizhny Novgorod, Russia
b Institute of Biology, Komi Scientific Center, Ural Branch, Russian Academy of Sciences, Syktyvkar, Russia
c Department of Hydrology, Faculty of Geography, Moscow State University, Moscow, Russia
d Institute of Biophysics, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
e Siberian Federal University, Krasnoyarsk, Russia
Correspondence to: *e-mail: slava.zhiharev@bk.ru
Received 20 October, 2022
Abstract—A Siberian diaptomus, identified as Leptodiaptomus cf. angustilobus (Sars G.O., 1898), has been found for the first time in Europe (Russia, Nizhny Novgorod oblast, mouth area of the Kerzhenets River (Middle Volga), 56°6′5″ N, 44°57′28″ E). A brief morphological description with illustrations of the species is presented. Differences in the morphometry of abdominal somites, length of antennules, and size of the fifth pair of thoracic legs are shown between females from Nizhny Novgorod oblast and Siberia. We have also obtained data on the abundance of L. cf. angustilobus in the plankton community of the mouth area of the Kerzhenets River and described habitat conditions for the Diaptomidae species new to this region.
Keywords: biogeography, nonnative fauna, Diaptomidae, Calanoida, mouth area, Kerzhenets River, Middle Volga, Europe
DOI: 10.1134/S1995082923050188