Eccoptolonthus conaensis Fei & Zhou, 2021

Fei, Xu-Dong & Zhou, Hong-Zhang, 2021, Revision of Eccoptolonthus Bernhauer (Coleoptera: Staphylininae: Philonthina) with descriptions of four new species from China, Zootaxa 4949 (3), pp. 473-498 : 476-479

1. Eccoptolonthus conaensis Fei & Zhou , sp. nov.

( Figs. 1A–G , 2A–F )

Type materials. Holotype: ♂, China : Tibet: Cona county: Lexiangle village, Simuza Scenic area (27º8262′ N, 91º7293′ E), 2793 m, 4. VI .2016, collected by Liang Hongbin ( IZ-CAS). Paratype: ♂, same locality, 8. VI .2016, collected by Liang Hongbin ( IZ-CAS).

Description. Length: BL= 7.8 mm (HPL= 2.4 mm). Length of different body parts: HL= 1.00 mm, HW= 1.2 mm (HW: HL= 1.2); ELL= 0.4 mm; TL= 0.5 mm; PL= 1.3 mm, PW= 1.2 mm (PW: HW= 1.00); EL= 1.6 mm, EW= 1.6 mm; AW= 1.5 mm.

Head and pronotum black, slightly iridescent shining. Antennae black with antennomere XI dark brown, suture of antennae reddish-brown. Elytra black with suture and posterior margin markedly reddish-brown. Scutellum dark reddish-brown. Abdomen black with strongly iridescent lustre, posterior margin of each tergite narrowly reddishbrown. Mandibles and labrum reddish-brown, maxillary palpi and labial palpi yellowish-brown. Profemur and mesofemur yellowish-brown, metafemur dark reddish-brown, tarsomere I dark brown, tarsomere II–IV yellowishbrown, tarsomere V yellow.

Head slightly inverted trapezoidal shape, slightly wider than long, without discernible hind angles. Tempora almost evenly rounded, sparsely and coarsely punctate; eyes moderately large, slightly prominent, about 0.8 times as long as tempora. Dorsal surface of head with sparse, large setiferous punctures, becoming sparser toward vertex, vertex largely impunctate. Entire head with distinct and distinct microsculpture of transverse waves. Antennae long, antennomere I very long, distinctly thickened towards apex, antennomere I about two times as long as antennomere II, antennomere III about 1.3 times as long as antennomere II, following antennomeres gradually decreasing in length, but all antennomeres distinctly longer than wide, antennomere XI obliquely truncated.

Pronotum approximately rectangular, slightly convex, posterior angles markedly rounded, pronotum almost as wide as head, slightly narrowed anteriad, moderately and finely punctate, punctures separated by three to five times their diameter, narrowly impunctate along midline, disc with distinct and profound microsculpture of oblique lines.

Elytra slightly longer than pronotum; scutellum large, triangular; elytra and scutellum densely and finely punctate, punctures separated by one to two times their diameter, punctures much finer than those on head and pronotum.

Abdomen wide, very gradually narrowing towards apex; moderately and finely punctate, punctures separated by three to four times their diameter, gradually becoming sparser toward apex; punctation of basal portion of all tergites coarser than that on elytra, becoming sparser towards posterior margin of each tergite; surface between punctures without microsculpture.

Male: Sternite VIII with arcuate emargination, moderately wide, partly filled by semi-membranous extension, in obtusely triangular emargination ( Figs. 1G , 2E ). Genital segment with stylus of tergite IX simple, bearing two longer and stronger setae and some strong setae at the apex ( Figs. 1E , 2F ). Sternite IX with asymmetrical basal portion, apex deeply emarginate, each lobe without modified rod-like extension ( Figs. 1D , 2C ). Tergite X approximate trapezoid, apex slightly emarginate, with some long and strong apical setae. ( Figs. 1F , 2D ).

Aedeagus with median lobe distinctly exceeding paramere, narrowed into subacute apex ( Figs. 1B , 2A ); in lateral view, apical portion of median lobe slightly bent dorsally (adparameral side) ( Figs. 1C , 2B ); in ventral view, paramere distinctly narrower than median lobe, lobe narrowed into obtusely rounded apex, with sensory setae regularly arranged along apical portion of paramere, face adjacent to median lobe with sensory peg setae irregularly arranged along apical portion of paramere.

Female. Unknown.

Remarks. Eccoptolonthus conaensis Fei & Zhou sp. nov. is most similar to Eccoptolonthus luteus ( Li & Zhou, 2011) but can be easily distinguished by paramere cylindrical, strongly broadened from the middle to base (paramere of E. luteus conical, weakly gradually broadening towards base); median lobe in lateral view with apex deflexed dorsad and with base sinuate; male tergite X with deep triangular medioapical emargination; male sternite IX with basal portion strongly deflexed laterad.

Etymology. The specific epithet refers the name of the type locality “Cona County”.

Distribution. This species is at present known only from the type locality.

Figures

FIGURE 1. Eccoptolonthus conaensis Fei & Zhou, sp. nov. A. Habitus; B. aedeagus, dorsal (parameral side) view; C. aedeagus, lateral view; D. sternite IX of male; E. stylus of tergite IX of male; F. tergite X of male; G. sternite VIII of male. Scale bars, A= 1 mm; B, C, D, E, F, G= 0.2 mm.

FIGURE 2. Eccoptolonthus conaensis Fei & Zhou, sp. nov. A. aedeagus, dorsal (parameral side) view; B. aedeagus, lateral view; C. sternite IX of male; D. tergite X of male; E. sternite VIII of male; F. stylus of tergite IX of male. Scale bars, A, B, C= 0.15 mm; D= 0.1 mm; E, F= 0.17 mm.