Helophorus kaszabianus, Angus, 1970

Enkhnasan, Davaadorj & Boldgiv, Bazartseren, 2019, Endemic and sub-endemic water beetles of Mongolia and their distribution ranges, Journal of Species Research 8 (4), pp. 395-406 : 401-402

Helophorus kaszabianus Angus, 1970 ( Fig. 5 )

Diagnosis. Length: 3.2 - 3.6 mm, breadth: 1.3 - 1.5 mm.

Head: shining pitchy with dark greenish reflections. Surface punctate or with weak rugose granulation. Stem of Y-groove shallow, ill defined, either narrow or distinctly expanded anteriorly. Maxillary palpi brown, apical segment asymmetrical, sometimes very short, occasionally darkened at the tip. Antennae nine-segmented, brown, the clubs darker. Pronotum: weakly arched, sometimes flattened across the internal intervals. Widest part at the base of the anterior third, distinctly narrowed posteriorly, the side either straight or weakly curved in the basal half, sometimes sinuate before the hind angles. Elytra: elongate, moderately striate, interstices flat. Ground col- or mid to dark, sutural Λ-mark and spot on interstice six evident on paler specimens. Legs: dark brown, long, tarsi with well-developed swimming hairs ( Angus, 1970b).

Published records. Bellstedt, 1985: 140 - Khovd.

Remarks. Helophorus kaszabianus Angus, 1970: 275 Holotype ♂ (Hungarian Natural History Museum, Budapest): Mongolia, Bayan-Ölgii, 1,890 m, 29.vi.1968, leg. Z. Kaszab]. Collection No 1043.

Figures

Fig. 5. Helophorus kaszabianus Angus, 1970. Photos by Robert Angus. a. Dorsal habitus, male, b. Head and pronotum, c. Aedeagus, dorsal view.