Namtokocoris

Sites, Robert W. & Vitheepradit, And Akekawat, 2007, Namtokocoris Sites, a new genus of Naucoridae (Hemiptera: Heteroptera) in waterfalls of Indochina, with descriptions of six new species, Zootaxa 1588, pp. 1-29 : 6

Key to the species of Namtokocoris

1. Posterolateral corners of pronotum not produced posteriorly* ( Figs. 11 a, b, f)..........................................2

1’. Posterolateral corners of pronotum produced posteriorly* ( Figs. 11 c-e)....................................................4

2. Small, body length <8.0 mm; reddish-brown U-shaped marking on scutellum .. Namtokocoris minor n.sp.

2’. Body length> 8.0 mm; scutellum concolorous dark brown, but if reddish markings, never in continuous U-shape.........................................................................................................................................................3

3. Males with median process of pygophore shorter than wide and asymmetrically directed to left; aedeagus with right margin abruptly angled and apex strongly hooked ( Figs. 12 b, 13b). Females with well-developed lateral lobe on costal margin of right hemelytron at position of abdominal segment V; mediosternite VI with posterior margin flat or slightly concave; subgenital plate with apex flat with broadly rounded corners ( Fig. 14 b); embolium with anterolateral margin weakly curved ( Fig. 11 b)....................................... ....................................................................................................................... Namtokocoris akekawati n.sp.

3’. Males with median process of pygophore longer than wide and symmetrical; aedeagus with right margin smoothly curved and apex weakly hooked ( Figs. 12 a, 13a). Females with very weak or no lateral lobe on costal margin of right hemelytron at position of abdominal segment V; mediosternite VI triangular with posterior margin pointed; subgenital plate with apex spatulate ( Fig. 14 a) or acuminate; embolium with anterolateral margin strongly curved ( Fig. 11 a) ............................................. Namtokocoris siamensis n.sp.

4. Claval commissure longer than pronotum at midline. Female with well-developed lateral lobe on costal margin of right hemelytron at position of abdominal segment V .................. Namtokocoris khlonglan n.sp.

4’. Claval commissure shorter than pronotum at midline. Female with very weak or no lateral lobe on costal margin of right hemelytron at position of abdominal segment V................................................................5

5. Aedeagus with tip nearly straight; apex of median process of pygophore digitate and rounded distally ( Figs. 12 c, 13c). Females with posterior margin of mediosternite VI slightly convex ( Fig. 14 c) ............... ........................................................................................................................... Namtokocoris dalanta n.sp.

5’. Aedeagus with tip curved to right and pointed; apex of median process of pygophore broad, slightly concave distally with sharp corners ( Figs. 12 d, 13d). Females with posterior margin of mediosternite VI slightly concave or straight in middle ( Fig. 14 d) ..................................................... Namtokocoris kem n.sp.

Figures

FIGURE 11. Left margin of pronotum and embolium of macropterous a) Namtokocoris siamensis, b) Namtokocoris akekawati, c) Namtokocoris dalanta, d) Namtokocoris kem, e) Namtokocoris khlonglan, and f) Namtokocoris minor.

FIGURE 12. Genital capsule of males of a) Namtokocoris siamensis, b) Namtokocoris akekawati, c) Namtokocoris dalanta, d) Namtokocoris kem, e) Namtokocoris khlonglan, and f) Namtokocoris minor. Scale bar = 1.0 mm

FIGURE 14. Ventral aspects of terminal abdominal segments of females of a) Namtokocoris siamensis, b) Namtokocoris akekawati, c) Namtokocoris dalanta, d) Namtokocoris kem, e) Namtokocoris khlonglan, and f) Namtokocoris minor.