Taiwanocantharis adentata, Yang, Yuxia & Yang, Xingke, 2014

Yang, Yuxia & Yang, Xingke, 2014, Taxonomic note on the genus Taiwanocantharis Wittmer: synonym, new species and additional faunistic records from China (Coleoptera, Cantharidae), ZooKeys 367, pp. 19-32 : 25-26

Taiwanocantharis adentata sp. n. Figs 3, 13-16

Type material.

Holotype♂ (MHBU): CHINA: Gansu: Wenxian, Huangtuling, 2350m, 9.VII.2003, leg. Y.B. Ba & Y. Yu. Paratypes: 1 ♀ (MHBU): same data to holotype; 1 ♀ (MHBU): same data, 8.VII.2003. 1 ♂ (NHMB): [Sichuan]: Da Tsien Lou [Kangding], 3.VI.(18)93 (collector, hand-writing, hardly readable).

Description.

Male (Fig. 3). Body black, except mandibles brown, antennomeres I–II brown on ventral sides, pronotum yellow, with a large black marking extending from anterior to posterior margin, elytra green, with strongly metallic shine.

Head rounded, surface matt on frons, densely punctate on vertex, eyes slightly protruding, head width acrossing eyes slightly narrower than anterior margin of pronotum; terminal maxillary palpomeres nearly long-triangular, widest at basal one-third; antennae filiform, extending to elytral middle length, antennomeres II about 3 times longer than wide, III slightly longer than II, IV–XI each with a narrow, smooth longitudinal to oval groove nearly in middle of outer margin.

Pronotum wider than long, widest at anterior one-third, anterior margin straight, lateral margins sinuate, posterior margin bisinuate and narrowly bordered, anterior angles rounded, posterior angles nearly rectangular, not protruding, disc slightly convex at postero-lateral parts, surface lustrous, finely and sparsely punctate.

Elytra nearly parallel-sided, about 3 times longer than width at humeri, about 4 times of length of pronotum, dorsum finely punctate, lustrous at anterior one-third parts, roughly but shallowly rugoluse-lacunose on the rest.

Legs: all outer tarsal claws each with a triangular lobe at base, inner claws simple.

Aedeagus (Figs 13-15): ventral process of each paramere narrow, slightly shorter than conjoint dorsal plate; conjoint dorsal plate with apical margin slightly emarginated in middle, lateroapical angles acutely dentated, without any tooth on inner surface; laterophyse adhered to median lobe, with apex bent towards middle, the portion around the bending corner with upper margin slightly protuberant and bent dorsally.

Female. Similar to male, but eyes smaller, terminal maxillary palpomeres shorter, nearly widest in middle, antennae shorter, extending to elytral one-third length, antennomeres IV–XI without any groove, pronotum wider, elytra with lateral margins slightly diverging posteriorly, abdominal sternite VIII (Fig. 16) largely emarginated in middle and slightly emarginated on both sides of posterior margin, the portion between middle and each lateral emarginations subrounded at apex.

Body length: 8.0-11.0 mm; width: 2.0-2.5 mm.

Diagnosis.

This species is similar to Taiwanocantharis thibetanomima , but can be distinguished from the latter by the aedeagus: conjoint dorsal plate of parameres with lateroapical angles acutely dentated, without any tooth on inner surface.

Distribution.

China (Gansu, Sichuan).

Etymology.

This specific name is derived from the Latin “a-” (none) + “dentatus” (toothed), referring to its conjoint dorsal plate of parameres without any tooth on inner surface.