Pseudohesperus pedatiformis, Li & Zhou, Li & Zhou, 2011

Li, Liang & Zhou, Hong-Zhang, 2011, Revision and phylogenetic assessment of the rove beetle genus Pseudohesperus Hayashi, with broad reference to the subtribe Philonthina (Coleoptera: Staphylinidae: Staphylinini), Zoological Journal of the Linnean Society 163 (3), pp. 679-722 : 705-707

publication ID 10.1111/j.1096-3642.2011.00731.x


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scientific name

Pseudohesperus pedatiformis



Type material: Holotype: China: Sichuan: ♂, Wolong: Wulitun   (31°28′N, 103°36′E), 2600 m asl, 6.v.2004, Yu Xiaodong collected (IZ-CAS). GoogleMaps  

Description: Head and pronotum black, shining. Antennae black with antennomere XI dark brown. Elytra and scutellum black. Abdomen black with strongly iridescent lustre. Mandibles, maxillary and labial palpi reddish-brown. Legs dark brown.

Body 8.98 mm long ( HPL: 2.61 mm). Head of rounded quadrangular shape, 1.14 mm long, 1.22 mm wide, slightly wider than long ( HW: HL = 1.07). Tempora 0.41 mm long, almost evenly rounded, sparsely and coarsely punctate; eyes moderately large, slightly prominent, 0.49 mm long, 1.20 times as long as tempora. Lateral portion of head with scattered, large setiferous punctation, vertex largely impunctate. Entire head with distinct and profound microsculpture of transverse waves. Antennae long, antennomere I very long, distinctly thickened towards apex, antennomere III much longer than antennomere II, following antennomeres gradually decreasing in length, but all distinctly longer than wide, antennomere XI obliquely truncated.

Pronotum slightly narrowed anteriad, 1.31 mm long, 1.31 mm wide, slightly wider than head ( PW: HW = 1.07), sparsely and finely punctate, punctures separated by three to six times their diameter, narrowly impunctate along midline, disc with distinct and profound microsculpture of oblique line.

Elytra 1.71 mm long, 1.96 mm wide, along sides about 1.31 times as long as pronotum, densely and finely punctate, punctures separated by one to two times their diameter. Scutellum large, triangular, densely and finely punctate, and pubescent.

Abdomen a little narrowed posteriad, widest 1.71 mm, densely and finely punctate, punctures separated by two to three times their diameter at base, gradually becoming sparser toward apex; tergites III–V with two basal carinae, elevated area between basal carinae almost impunctate.

Male: Tergite VIII with arcuate apex ( Fig. 26E View Figure 26 ). Sternite VIII with moderately wide, obtusely triangular medioapical emargination, partly filled by semimembranous extension ( Fig. 26F View Figure 26 ). Genital segment with stylus of tergite IX simple, densely setose apically. Sternite IX with asymmetrical basal portion, apex deeply emarginate, without modified rod-like extensions ( Fig. 26G View Figure 26 ). Tergite X triangular with moderately deep medioapical emargination ( Fig. 26D View Figure 26 ).

Aedeagus quite characteristic; median lobe narrowed into obtusely rounded apex ( Fig. 26A View Figure 26 ); in lateral view, apical portion of median lobe slightly bent dorsad (parameral side) ( Fig. 26B View Figure 26 ); paramere slightly exceeding median lobe, trilobed apically, middle lobe distinctly longer and slightly narrower than lateral lobes, face adjacent to median lobe with peg setae closely arranged along apical margin of each lobe of paramere ( Fig. 26C View Figure 26 ).

Female: Unknown.

Etymology: The specific epithet is derived from a combination of the Latin words pedat- (pedate) and form- (shape), and refers to the shape of paramere of the aedeagus.

Distribution: At present known only from China (Sichuan).

Remarks: Pseudohesperus pedatiformis Li & Zhou   sp. nov. is closely related to P. tripartitus Li & Zhou   sp. nov. Pseudohesperus pedatiformis Li & Zhou   sp. nov. can be easily distinguished from P. tripartitus Li & Zhou   sp. nov. by much larger eyes and completely different paramere of aedeagus.


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