Eotrechus romglao Vitheepradit & Sites, 2007

Tran, Anh Duc, Zettel, Herbert & Sites, Robert W., 2023, Revision of the genus Eotrechus Kirkaldy (Hemiptera, Heteroptera, Gerridae), with descriptions of six new species, Deutsche Entomologische Zeitschrift 70 (1), pp. 69-111 : 69

Eotrechus romglao Vitheepradit & Sites, 2007

Fig. 13A, C-E , 26

Eotrechus romglao Vitheepradit & Sites, 2007: 12-16, figs 2, 9-11 (type locality: Phu Hin Rongkla National Park, Phitsanulok Province, Thailand).

Eotrechus romglao : Nakthong et al. (2014: 59-61, figs 38, 44) (diagnosis, notes, key).

Material examined.

Holotype: Thailand • ♂ (macropterous); Phitsanulok Province, Phu Hin Rongkla National Park, Namtok Romglao , rock face; 16°59'N, 101°00'E; 1190 m a.s.l.; 6 May 2003; Vitheepradit, Prommi, Ferro leg.; L-507; UMC.

Paratypes: Thailand • 3 ♂♂, 6 ♀♀ (macropterous); same data as holotype; UMC • 1 ♂, 1 ♀ (macropterous), same data as holotype; ZRC • 1 ♂ (apterous), 4 ♂♂, 1 ♀ (macropterous); same locality as holotype; 11 Mar. 2002; R. Sites, A. Vitheepradit, K. Kirawanich leg.; L-288; UMC • 10 ♂♂, 7 ♀♀ (macropterous); same locality as holotype; 22 Apr. 2002; CMU team leg.; UMC .

Diagnosis.

Size (all macropterous): males, length 7.76-8.24, width 2.00-2.08; females, length 7.80-8.40, width 2.16-2.32. Venter of head of both sexes: pale background with a median brown marking and a pair of lateral light-brown, slender stripes. Mesosternum ca. 2.8 × length of metasternum. Male: fore femur moderately incrassate, broad tubercle on basal part indistinct, but with a spot of dense, minute, black setae, flexor side with a row of approximately six long, stiff setae; fore tibia almost straight, slightly curved subapically, exterior side with scattered long, stiff setae (Fig. 13A ); abdominal sterna III-VI medially grooved; sternum VII broadly depressed, length subequal to two preceding sterna combined, posterior margin with a median U-shaped notch as deep as one-third of sternum VII length. Male genitalia (Fig. 13C-E ): venter of abdominal segment VIII about as long as sternum VII, posterior margin almost straight with dense, yellowish setae; caudal projection of pygophore triangular (in ventral or dorsal view) and directed dorsad (in lateral view), apex narrowly rounded; lateral tubercle of pygophore well-produced, subtriangular, bearing long setae; paramere ovoid; proctiger with lateral tubercles bearing long setae, apex pointed, ventral surface with a sparse patch of long setae. Female: fore femur relatively slender, with a row of 16 long, stiff setae; extensor side of fore tibia with many long, stiff setae along its length; abdominal sternum VII about as long as two preceding sterna combined, posterior margin almost straight, not concealing genitalia; tergum VIII produced posterolaterally.

Remarks.

Eotrechus romglao is closely related to E. thai sp. nov. See Remarks under the latter for further details.

Distribution.

Thailand: Phitsanulok ( Vitheepradit and Sites 2007) (Fig. 26 ).

Figures

Figure 13. Eotrechus romglao (A, C-E) and E. thai sp. nov. (B, F-I). A, B. Right fore leg, ventral view; C, G. Genital capsule (pygophore and proctiger) of male, lateral view; D, H. Pygophore, dorsal view; E, I. Proctiger, dorsal view; F. Abdominal apex of female, dorsal view (A, B. Same scale; C-E, G-I. Same scale).

Figure 26. Distribution records of species of Eotrechus. Circles represent E. longipes species group; squares represent E. petraeus species group; stars represent E. vietnamensis species group.