Eotrechus romglao Vitheepradit and Sites

Nakthong, La-Au, Vitheepradit, Akekawat & Sites, Robert W., 2014, Key to the species of Eotrechinae (Hemiptera: Heteroptera: Gerridae) of Thailand and review of the fauna of the Phetchabun Mountain Range, Zootaxa 3860 (1), pp. 47-63 : 60-61

Eotrechus romglao Vitheepradit and Sites

Figs. 38 , 44

Eotrechus romglao Vitheepradit and Sites 2007 : Zootaxa 12–16.

Diagnosis. Males of E. romglao have a triangular pygophore with a pair of distinct, short, lateral projections ( Fig. 44 ), whereas those of E. elongatus have an elongate pygophore with a blunt tip and no projections. Males can be distinguished from those of E. kalidasa by the mesosternum being approximately twice as long as the metasternum, whereas in the latter species the mesosternum is less than twice as long as the metasternum.

Discussion. This species was previously reported from Romglao Waterfall in Phu Hin Rongkla NP, which is part of Phetchabun Mountain Range in Phitsanulok Province ( Vitheepradit & Sites 2007). More specifically, this species occurred syntopically with E. elongatus at the type locality ( Vitheepradit & Sites 2007). We have attempted to collect this species several times from 2010 to 2012 at the type locality and adjacent areas, including a nearby creek. However, no additional specimens were collected. This species appears to be restricted to Phu Hin Rongkla NP in Phitsanulok Province.

Material examined. THAILAND: Phitsanulok Province: Phu Hin Rongkla NP, Romglao Waterfall, 16°59'N 101°00'E, 1190 m, 11-III-2002, R.W. Sites, A. Vitheepradit, K. Kirawanich, L-288 (5 winged males, 6 winged females); same locality, 22-IV-2002, CMU team (11 winged males, 16 winged females); same locality, 22-IV-2002, N. Changthong (1 winged male, 1 winged female); same locality, 22-IV-2002, A. Nantakwang (2 winged females); same locality, 17-III-2003, CMU team (1 winged female); same locality, 6-V-2003, UMC and CMU teams, L-507 (8 winged males, 10 winged females).

Figures

FIGURES 36 – 39. Forelegs of male Eotrechus. (36) E. elongatus, (37) E. petraeus, (38) E. romglao, (39) E. siamensi s.

FIGURES 40 – 45. Terminal abdominal segments of male Eotrechus. (40) E. elongatus, (41) E. hygropetricus, (42) E. kalidasa, (43) E. petraeus, (44) E. romglao, (45) E. siamensi s.