Berosus spinosus (Steven, 1808)

Prokin, A. A., 2018, New species of the genus Berosus (Coleoptera: Hydrophilidae) from Central Asia and Transcaucasia, Far Eastern Entomologist 368, pp. 1-10 : 7

Key to species of Berosus spinosus species group

1. Labrum dark brown to black ................................................................................ 2

– Labrum pale .......................................................................................................... 3

2. Pronotum without spots or dark patterns; abdominal ventrite 5 without toothlets at the posterior margin …....................................................................... B. fulvus

– Pronotum with geminate, mostly clearly distinct pattern; abdominal ventrite 5 with small toothlets at posterior margin ................................................ B. jaechi

3. Total body length usually more than 5.5 mm; length of aedeagus more than 2.1 mm ..................................................................................................................... 4

– Total body length less than 5.5 mm; length of aedeagus less than 2.1 mm; abdominal ventrite 5 without toothlets at posterior margin ( Figs. 8–11 ) ...............… 5

Figures

Figs. 8–11. Ventrite V of Berosus litvinchuki sp. n. 8, 10 – male; 9, 11 – female; 8, 9 –