Rheocricotopus (Rheocricotopus) inaquereus Sasa, Katami & Suzuki

(Figs 6 A–C)

Rheocricotopus (R heocricotopus) inaquereus Sasa, Katami & Suzuki, 2001: 19; Ashe & O’Connor 2012: 571.

Material examined. Holotype, male, on the shore of Lake Inawashiro, The Dr.Noguchi Memorial Hall, Japan. 4. IX. 1999, sweeping (No. 397: 10).

Diagnostic characters. The species can be separated from other East Asian members of the genus by superior volsella developed and with almost right-angle corner, inferior volsella extended and double-layered, Anal point with 3 long lateral setae on each side.

Additional description and corrections. Based on the analysis of holotype material, the examined characters were consistent with the original description, but some additional characters should be added: Total length / wing length 2.0. Wing length / length of profemur 2.5. Tentorium 140 µm long, 28 µm wide. Dorsocentrals 11, scutellars 6. Squama with 10 setae. Palpomeres length (in µm): 35, 50, 85, 110, 175. Palpomere 2 ellipsoid, 3 and 4 rectangular, 5 long and slender, Palpomeres 5/3: 2.1. Laterosternite IX with 7 long setae. Anal point 38 µm long, basal wide 18 µm, peak wide 5 µm, with 3 long lateral setae on each side. Transverse sternapodeme 75 µm long, with weak oral projections. Gonocoxite 175 µm long. Gonostylus 80 µm long, with small triangularly costa dorsalis. Megaseta 13 µm long. HR 2.2, HV 3.3. The wing and hypopygium of holotype are re-drawn as in Figs 6 A–C.

Distribution. The species occurs in Japan (Palaearctic Region).