Eccoptolonthus dafoensis 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 : 479-481

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Eccoptolonthus dafoensis Fei & Zhou

sp. nov.

2. Eccoptolonthus dafoensis Fei & Zhou   , sp. nov.

( Figs. 3A–H View FIGURE 3 , 4A–F View FIGURE 4 )

Type material. Holotype: ♂, China: Guizhou: Jiangkou: Fanjing mountain S slope 4500 steps (Huixiangping) (27º90180′ N, 108º70372′ E), 1778 m, 23.VIII.2012, collected by Shi Hongliang, Huang Xinlei and Liu Yizhou ( IZ-CAS).  

Description. Length: BL= 9.31 mm (HPL= 3.1 mm). Length of different body parts: HL= 1.33 mm, HW= 1.41 mm (HW: HL= 1.06); ELL= 0.35 mm; TL= 0.75 mm; PL= 1.55 mm, PW= 1.43 mm (PW: HW= 1.01); EL= 1.91 mm, EW= 1.86 mm; AW= 1.77 mm.

Head and pronotum black. Elytra, scutellum and abdomen dark reddish-brown, abdomen reddish-brown, with slightly iridescent lustre. Antennae dark brown. Mandibles reddish-brown, labrum dark brown, maxillary and labial palpi yellowish-brown. Legs dark brown, except tarsi yellowish-brown.

Head of rounded quadrangular shape, slightly narrower than long. Tempora almost evenly rounded, moderately and coarsely punctate; eyes small, slightly concave, about 0.47 times as long as tempora. Dorsal surface of head with moderately numerous, large setiferous punctures and some setae, becoming sparser toward vertex; vertex largely impunctate. Entire head with distinct and profound microsculpture of transverse waves. Antennae long, antennomere I long, thickened towards base, antennomere I about 2.0 times as long as antennomere II, antennomere III about 1.4 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, parallel-sided, punctation moderate and fine, punctures separated by two to five times their diameter, narrowly impunctate along midline, the punctures almost same in size, and microsculpture very obsolete as well as on head.

Elytra about 1.23 times as long as 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, densely and finely punctate, punctures separated by two to three times their diameter; tergites III–VII with two basal lines, elevated area between basal carinae with a row of punctures and setae; 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 moderately wide, obtusely triangular medioapical emargination ( Figs. 3G View FIGURE 3 , 4E View FIGURE 4 ). Genital segment with stylus of tergite IX simple, approximate cylindrical, densely setose apically ( Figs. 3F View FIGURE 3 , 4F View FIGURE 4 ). Sternite IX with asymmetrical basal portion, apex moderately emarginate, without modified rod-like extensions ( Figs. 3E View FIGURE 3 , 4C View FIGURE 4 ). Tergite X with apex truncate, with three longer and stronger setae and shorter setae on the margin. ( Figs.3H View FIGURE 3 , 4D View FIGURE 4 ).

Aedeagus: median lobe slightly exceeding paramere, narrowed into subacute apex, median lobe significantly wider than paramere, paramere approximatively cylindrical, narrowed into subacute apex, with five pairs of setae at the apex, sensory peg setae arranged in two circular areas in apical portion of paramere ( Figs. 3B–C View FIGURE 3 , 4A View FIGURE 4 ). In lateral view, aedeagus elongate and sharply pointed apicad ( Figs.3D View FIGURE 3 , 4B View FIGURE 4 ).

Female. Unknown.

Remarks. Eccoptolonthus dafoensis Fei & Zhou   sp. nov. is most similar to Eccoptolonthus luteus ( Li & Zhou, 2011)   but can be easily distinguished by eyes smaller, about 0.47 times as long as tempora; male tergite X with distinctly truncate apex, paramere not trilobed apically; sensory peg setae forming two circular areas in the apex of paramere

Etymology. The specific epithet refers to the Chinese name of a large buddha; there is a buddha on Fanjing mountain.

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