Berosus (s. str.) geminus Reiche & Saulcy, 1856

Sazhnev, Alexey S., 2020, New records of water scavenger beetles Berosus geminus Reiche & Saulcy, 1856 (Coleoptera: Hydrophilidae) from Russia, Acta Biologica Sibirica 6, pp. 423-428 : 423

Berosus (s. str.) geminus Reiche & Saulcy, 1856

Fig. 1-2.

Material examined.

RUSSIA • 1♂, 1♀; Yaroslavl Oblast, Nekouzsky distr., Borok vill. env., littoral of Shumarovka River ; sand, 58°02'24"N, 38°15'04"E; 12 Apr. 2016; A.S. Sazhnev leg. (IBIW, Borok, Yaroslavl Region, Russia) .

Diagnosis.

Body length 4.5-6 mm. Spots on pronotum in shape of narrow stripes (Fig. 1 ). First abdominal ventrite with small longitudinal keel on the base. Elytral apex rounded, without spine. Interval 4 of elytra with regular row of punctures, bigger punctures visible on elytra interval 3 only. At the sides of elytra - a clear and isolated spot (Fig. 1 ). Aedeagus as in Fig. 2

Known distribution.

Austria, Croatia, Czech Republic, Germany, Hungary, Italy, Poland, Romania, Slovakia, Ukraine, «Caucasus», North European Territory of Russia (new, our record!) and West Siberia ( Shatrovskiy 2017; Przewoźny 2019). As a result, a map of general distribution of this species is compiled using published data ( Schödl 1993; Przewoźny and Buczyński 2008; Shatrovskiy and Kravchenko 2016; Shatrovskiy 2017) and our new record (Fig. 3 ).

Figures

Figure 3. Distribution of Berosus (s. str.) geminus: red circles - localities from references; white circles - countries with a general recorded in the Catalogue of Palearctic Hydrophiloidea (without localities), white square - locus typicus " Caucasus ", red star - new record.

Figure 1 - 2. 1 Dorsal habitus of male Berosus (s. str.) geminus from Yaroslavl Oblast, Russia. 2 Aedagus. A - lateral view, B - side view.