Meleagros astericollis, Gildenkov, 2020

Fedorenko, D. N., 2020, New species of Meleagros and Tarsagonum (Coleoptera: Carabidae: Platynini) from the Oriental region, Russian Entomological Journal 29 (2), pp. 139-147 : 141

KEY TO SPECIES OF MELEAGROS :

1(2) Pronotum ( Fig. 4 ) stellate, sides neither explanate nor beaded in front of strongly protruding acute lateral angles; apical angles adherent to neck. Body dorsally and ventrally distinctly setulose. Prosternal process beaded. Eyes small and protruding, HnW/OL 2.4 — Central Vietnam. ....................................................... M. astericollis sp.n.

2(1) Pronotum hexagonal, with lateral angles obtuse to right, sides explanate and/or beaded throughout their length. Body dorsum glabrous or indistinctly setulose.

3(8) Pronotal apical angles more or less distant from neck and a little projecting ( Figs 1–2 ). Prosternal process flat to subconvex, without marginal bead. Eyes small and protruding, HnW/OL 2.3–3.0.

4(5) Body large, BL 12.6–13.8 mm, and glabrous. Eyes very small and protruding, HnW/OL 2.9–3.0. Pronotal basal angles right. Protarsi indistinctly carinate or sulcate — Southern Vietnam............................... M. laticeps sp.n.

5(4) Body a little smaller, BL 10.5–11.9 mm. Eyes larger, HnW/OL 2.3–2.5. Pronotal basal angles slightly obtuse. Protarsi finely tetracarinate.

6(7) Elytral intervals very convex. Metafemur unisetose — Yunnan, China..................... M. sinicola Morvan, 2006

7(6) Elytral intervals flat or almost so on disc. Metafemur bisetose — Northern Vietnam................. M. pseudosinicola sp.n.

8(3) Pronotal apical angles adherent to neck and nearly indistinct. Prosternal process with a marginal bead.

9(10) Body robust due to both head and pronotum wide, PW/ PL ≈ 1.4, eyes small and protruding, HnW/OL ≈ 2.5, BL 11.5–12 mm. — Southeast India (Sikkim), Nepal, Bhutan.................................. M. sikkimensis ( Andrewes, 1923)

10(9) Body slender and barely smaller, pronotum and usually head more narrow, PW/PL 1.07–1.24, BL 10–11.6 mm.

11(14) Dorsal microsculpture traceable on at least pronotum. Eyes larger and less protruding, HnW/OL 1.9. Pronotum narrow, PW/PL 1.1–1.2, base wider relative to apex, PB/ PA 1.15–1.25.

12(13) Pronotum with coarse microsculpture (‘shagreened’), narrow, PW/PL<1.1, base a fourth wider than apex...... ...................................... M. burmanensis Morvan, 2004

13(12) Entire dorsum with superficial microsculpture consisting of transverse meshes; pronotum slightly wider, PW/PL ≈ 1.2, PB/PA ≈ 1.15 ...... M. coeruleus Kirschenhofer, 1999

14(11) Head and pronotum without microsculpture, elytral microsculpture isodiametric to barely transverse. Eyes small and protruding, HnW/OL 2.28. Pronotum wider, PW/PL 1.24, with base more narrow, PB/PA 1.08. ...... ............................................................ M. setulosus sp.n.

Figures

Figs 4–6. Dorsal habitus of holotypes: 4 — Meleagros astericollis sp.n.; 5 — Tarsagonum (Louwerensium) breve sp.n.; 6 — T. (L.) indicum sp.n. Рис. 4–6. Габитус голотипов, дорЗально: 4 — Meleagros astericollis sp.n.; 5 — Tarsagonum (Louwerensium) breve sp.n., holotype; 6 — T. (L.) indicum sp.n.

Figs 1–3. Dorsal habitus of holotypes: 1 — Meleagros laticeps sp.n.; 2 — M. pseudosinicola sp.n.; 3 –– M. setulosus sp.n. Рис. 1–3. Габитус голотипов, дорЗально: 1 — Meleagros laticeps sp.n.; 2 — M. pseudosinicola sp.n.; 3 –– M. setulosus sp.n.