Tachinus curvipennis, 2019

Chang, Yuan, Li, Li-Zhen, Yin, Zi-Wei & Schülke, Michael, 2019, A review of the Tachinus longicornis - group of the subgenus Tachinoderus Motschulsky (Coleoptera: Staphylinidae: Tachyporinae) from China, Zootaxa 4545 (4), pp. 478-494 : 483-486

Tachinus (Tachinoderu s) curvipennis Chang, Li & Yin , new species

Chinese Common Name: 弯茎圆胸隐翅虫

( Fig. 5 , 12 )

Type material (4 exs). Holotype: CHINA: Ƌ: ‘ China : Hubei Prov., Houhe Conv. (后河自然保护区), Wufeng County (五峰县), 29.iv.2004, Li-Zhen Li leg.’ ( SNUC) . Paratypes: CHINA: 3 ƋƋ: same locality, except ‘ 30.iv.2004 ’ (all in SNUC) .

Diagnostic description. Male. Habitus as in Fig. 5A ; TBL 3.53–4.24 mm, FBL 2.50–2.59 mm; head, pronotal disc, elytra, and abdomen black, antennomeres I–IV, XI, mouthparts, pronotal posterolateral areas, and most parts of legs reddish-brown, tarsi yellowish-brown. Head sub-triangular, HL 0.47–0.52 mm, HW 0.75–0.80 mm, with

microsculpture and finely punctures at posterior portion; eyes prominent, EyL 0.19–0.24 mm; antenna elongate, AnL 1.88–1.93 mm, relative lengths of antennomeres I–XI: 1.5: 1: 1.75: 1: 1.5: 1.25: 1.25: 1: 1: 1: 1.5. Pronotum strongly transverse, PL 0.80–0.85 mm, PW 1.37–1.41 mm, PI 0.57–0.62. Elytra slightly broader than long, EL 1.13–1.22 mm, EW 1.31–1.41 mm, EI 0.80–0.93. Abdominal surface with microsculpture consisting of transverse waves; tergite VIII ( Fig. 5B ) with four relatively long lobes, inner lobes much longer than outer ones; sternite VII ( Fig. 5C ) with posterior margin broadly and shallowly emarginate, with granules sparsely arranged in two rows at middle near posterior margin; sternite VIII ( Fig. 5D ) with four lobes, deeply incised between inner lobes, median length of sternite 0.62 times as long as depth, lateral lobes relatively short; sternite IX elongate and asymmetric ( Fig. 5G ). Length of aedeagus ( Fig. 5 E–F) 0.80 mm, parameres elongate and thin, strongly curved ventrally in lateral view, median lobe broad at base and narrowing toward apex.

Female. Unknown.

Comparative notes. Tachinus curvipennis is most similar to T. drescheri Ullrich and T. tangliangi (described below) in sharing elongate and slender parameres of the aedeagus that greatly exceed the apex of the median lobe. It can be separated from T. drescheri by the much shallower median emargination of male sternite VII, and from T. tangliangi by the slightly deeper incisions between the inner and outer lobes, and a much narrower incision

between the inner lobes of male sternite VIII. Moreover, the parameres of the median lobe of the new species are relatively the longest among these three species.

Distribution. China: Hubei ( Fig. 12 ).

Etymology. The new specific epithet refers to the strongly curved parameres of the aedeagus.

Figures

FIGURE 5. Tachinus curvipennis, male. A. Habitus B. Tergite VIII. C. Sternite VII. D. Sternite VIII. E–F. Aedeagus, in lateral (E) and ventral (F) view. G. Sternite IX. Scale bar: 1.0 mm in A; 0.2 mm in B–G.

FIGURE 12. Distribution of the Chinese species of the Tachinus longicornis-group. Star—T. bilobus; Pentagon—T. centralis; Square—T. curvipennis; Diamond—T. lobutulus; Triangle—T. ohbayashii (red triangle represents published data, pink ones are new records); Circle—T. tangliangi (note this species also extends its distribution to northern Thailand).