Rheocricotopus (Rheocricotopus) tedorisecundus Sasa

Fu, Yue, Huang, Jingli, Liu, Wenbin, Fang, Xiangliang & Wang, Xinhua, 2016, Redescription of 13 holotypes of Rheocricotopus Brundin, 1956 (Diptera: Chironomidae) from the Sino – Indian Region, Zootaxa 4114 (3), pp. 261-276 : 272

Rheocricotopus (Rheocricotopus) tedorisecundus Sasa

( Figs 11 A–B )

Rheocricotopus (Rheocricotopus) tedorisecundus Sasa, 1994: 51 ; Ashe & O’Connor 2012: 572.

Material examined. Holotype, male, Tedori Dam, Ishikawa Prefecture., Honshu, Japan. 5. VIII. 1994, (No. 267: 24).

Diagnostic characters. The species can be separated from other East Asian members of the genus by superior volsella developed and long, like a stick, inferior volsella rounded margins, gonostylus with a small triangularly crista dorsalis.

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: Clypeus with 12 setae. Tentorium 165 µm long, 30 µm wide. Dorsocentrals 8. Wing of holotype destoryed. Palpomeres length (in µm): 40, 55, 80, 105, 185. Palpomere 2 ellipsoid, 3 and 4 rectangular, 5 long and slender, Palpomeres 5/3: 2.3. Anal point 40 µm long, basal wide 22 µm, peak wide 2.5 µm. Transverse sternapodeme 75 µm long, with weak oral projections. Gonocoxite 178 µm long. Gonostylus 80 µm long, with small crista dorsalis. Megaseta 12 µm long. HR 2.2, HV 2.8. The hypopygium of holotype are re-drawn as in Figs 11 A–B .

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

Figures

FIGURE 11 A – B. Rhecricotopus (Rheocricotopus) tedorisecundus Sasa, Male imago. A. Hypopygium, dorsal view. B. Hypopygium, ventral view.