Tarsagonum (Louwerensium) indicum, 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 : 146-147

Tarsagonum (Louwerensium) indicum

Fedorenko , sp.n.

Figs 6 , 14–16 .

MATERIAL. Holotype ♂ ( ZMMU) and paratypes, ♂ ♀ ( SIEE), labelled: ‘S-India, Karnataka, W[estern]. Ghats, Shimoga Distr., Jog Falls , 14°13.32´N / 74°48.6´E,h= 505 m, 30.X.2013, leg. S.Saluk’.

DESCRIPTION. As for the previous species, except as follows: BL 8.6–9.1 mm. Body ( Fig. 6 ). Microsculpture absent from clypeus; elytral microsculpture consisting of moderately transverse to isodiametric meshes.

Head hexagonal, eyes slightly larger and less convex, hemispherical, supra-ocular grooves slightly more shallow, genae subconvex, GL/OL 0.58–0.67 (0.63), and more oblique. Frons between eyes flat to transversely concave.

Pronotum similar except that apical angles are distinct, extreme apices of basal angles blunt, lateral bead subequally fine all along, and basal foveae barely longer; PW/PL 1.09– 1.15 (1.11), PW/HW 1.14–1.17 (1.15), PLw/PL 0.41–0.48 (0.45), PB/PA 1.17–1.18 (1.17).

Elytra longer, EL/EW 1.48–1.57 (1.52), EW/PW 1.82– 1.90 (1.85); sides straight to indistinctly concave in basal half.

Underside: prosternal process long, triangular in ventral view, with marginal bead reduced to two, parallel, lateral sections; apex in lateral slightly acute to right; inclination costate to sub carinate in posterolateral view, concave in lateral view.

Legs: Profemur with postero-apical seta and often also posterobasal seta vestigial, short; metatrochanteral seta missing.

Aedeagus ( Figs. 14–16 ): median lobe in ventral view wide apically, with right margin straight preapically. Internal sac similar, except that right tooth is smaller and short.

Female gonosubcoxite IX with multiple setae (more than a dozen) along apical margin, these being straight and arranged into a row externally while slightly curved and clustered inside; gonocoxite IX triangular yet narrow, parallel-sided in apical half and widely rounded apically, with a preapical nematiform seta and two small ventral setae, dorsal seta missing.

DIAGNOSIS. The new species is very similar to T. (L.) breve sp.n. For differences see the description above. The third member species of the genus, Tarsagonum kaszabi was described based on a single female specimen from Borneo. It is distinguished from the other two in the body smaller, BL 7 mm, the eyes sinuate anterolaterally, the elytral striae impunctate in apical two thirds, and USS nearly continuous.

NAME. Toponymic, refers to the type locality of the species.

GEOGRAPHIC DISTRIBUTION. Known from the type locality only.

Acknowledgements. I am much obliged to Dr. Boris Kataev ( ZISP) for the loan of material under his care and also to Dr. Sergey Saluk ( Minsk ) and Mr. Alexander Sokolov (Moscow) for donating specimens. This study was funded by the Presidium of the Russian academy of sciences, Program No. 41 “ Biodiversity of natural systems and biological resources of Russia .

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 7–16. Median lobe of aedeagus in holotypes: 7, 9 — Meleagros laticeps sp.n.; 8, 10 — M. pseudosinicola sp.n.; 11–13 — Tarsagonum (Louwerensium) breve sp.n.; 14–16 — T. (L.) indicum sp.n.; 7, 8, 11, 15 — left aspect; 9–10, 13–14 — ventral aspect; 12, 16 — right aspect. Scale bars: 0.5 mm. Рис. 7–16. СреднЯЯ долЯ Эдеагуса голотипов: 7, 9 — Meleagros laticeps sp.n.; 8, 10 — M. pseudosinicola sp.n.; 11–13 — Tarsagonum (Louwerensium) breve sp.n.; 14–16 — T. (L.) indicum sp.n.; 7, 8, 11, 15 — слева; 9–10, 13–14 — вентрально; 12, 16 — справа. Масштаб: 0,5 mm.