Helophorus parajacutus, 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 : 402

Helophorus parajacutus Angus, 1970 ( Fig. 6 )

Diagnosis. Length: 2.8 - 3.6 mm, breadth: 1.3 - 1.6 mm.

Head: shining pitchy bronze with red and green reflections, rugosely granulate, granules flattened, merging into one another and with median punctures. Stem of Ygroove narrow linear, sometimes indistinct. Maxillary palpi yellowish brown, apical segment asymmetrical, occasionally pyriform and sometimes darkened at the tip. Antennae nine-segmented, yellowish brown, clubs a little darker. Pronotum: highly arched, widest slightly before middle, sides evenly curved to hind angles or occasionally straighter basally. Ground color shining pitchy brown or dull orange. Elytra: Uniform pale brown, with at most a trace of darkening in place of the sutural Λ mark. Moderately striate, the interstices flat. Flanks not visible from below. Legs: yellowish-brown, tibiae and tarsi with well-developed swimming hairs ( Angus, 1970b).

Published records. Angus, 1970:279- Hövsgöl, Arkhangai, Khentii, Töv, Bayan-Ölgii; Bellstedt, 1985:140 - Khovd.

Remarks. Helophorus parajacutus Angus, 1970:280 [Holotype ♂ (Hungarian Natural History Museum, Budapest): Mongolia, Töv, 22.vi.1968, leg. Z. Kaszab] collection No 1002.

Figures

Fig. 6. Helophorus parajacutus Angus, 1970. Photos by Robert Angus. a. Dorsal habitus, male, b. Head and pronotum, c. Aedeagus.