Eotrechus pilicaudatus Tran & Zettel, 2006

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 pilicaudatus Tran & Zettel, 2006

Fig. 24

Eotrechus pilicaudatus Tran & Zettel, 2006: 40-43, figs 1-8 (type locality: Meghalaya, NE India).

Material examined.

Holotype: India • ♂ (apterous); Meghalaya, 3 km E Tura ; 25°30'N, 94°14'E; 1150 m a.s.l.; 18 Apr. 1999; L. Dembický & P. Pacholátko leg.; NHMW.

Diagnosis.

Size: apterous male: length (excluding genitalia) 6.50; width 2.40. Mesosternum ca. 4.0 × length of metasternum. Male: fore femur incrassate at basal part and tapering towards apex; middle and hind trochanters and basal part of middle and hind femur with many small spines; sternum VII about twice as long as two preceding sterna combined, posterior margin slightly emarginated. Male genitalia: abdominal segment VIII large; pygophore suboval, without lateral projections but with large tufts of long, black posterolateral setae, posterior margin with paired, small, pointed, black processes consisting of tightly packed, thick setae; proctiger with paired long, bristle-like, black setal tufts distolaterally. Female unknown.

Remarks.

This species is unique in having thick pilosity on the genitalia. Based on the absence of a caudal projection on the pygophore, this species can be placed in the E. hygropetricus species group. A comparison between E. pilicaudatus and E. hygropetricus was discussed in detail by Tran and Zettel (2006: 41, 43).

Distribution.

India: Meghalaya ( Tran and Zettel 2006) (Fig. 24 ).

Eotrechus longipes species group

Diagnosis. Male: fore femur moderately incrassate, tapering towards apex; posterior margin of sternum VII emarginated medially; genitalia large: pygophore with a pair of posterolateral projections; proctiger slender, with subtriangular apex. Female: sternum VII 1.1-1.5 × length of two preceding sterna combined, posterior margin medially produced (except in E. anderseni sp. nov.); genitalia visible in lateral view (only partly visible in E. anderseni sp. nov.).

Species included. E. longipes Andersen, 1982, E. terrestris Andersen, 1982, and E. anderseni sp. nov.

Figures

Figure 24. Distribution records of species of Eotrechus. Squares represent E. brevipes species group; circles represent E. hygropetricus species group.