The First Record of the Siberian Species <i>Leptodiaptomus</i> cf. <i>angustilobus</i> (Copepoda: Calanoida) in Europe

Abstract

The Siberian species, identified as Leptodiaptomus cf. angustilobus (Sars G.O., 1898), was found for the first time in Europe (Russia, Nizhny Novgorod Region, mouth region of the Kerzhenets River (Middle Volga), 56°6′5″ N, 44°57′28″ E). A brief morphology description with illustrations of the species is presented. Differences between females from the Nizhny Novgorod Region and Siberia in the morphometry of abdominal somites, antennules, and the fifth legs are shown. We also obtained data on abundance of L. cf. angustilobus in the plankton community of the mouth area of the Kerzhenets River and described habitat conditions of new for this region species of Diaptomidae.