Stenus pseudoflammeus , Tang, Liang, Liu, Si-Yu & Niu, Tong, 2016

Tang, Liang, Liu, Si-Yu & Niu, Tong, 2016, A revision of the Stenusflammeus group (Coleoptera, Staphylinidae) with descriptions of twelve new species, ZooKeys 595, pp. 57-83: 72

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scientific name

Stenus pseudoflammeus

sp. n.

Taxon classification Animalia Coleoptera Staphylinidae

Stenus pseudoflammeus  sp. n. Figs 7, 47-52

Type material.

Holotype. China: Sichuan: ♂, glued on a card with labels as follows: "China: Sichaun Prov., Dayi County, Xiling Xueshan, 30°41'59"N, 103°12'10"E, mixed leaf litter, shifted, 2150 m, 29.VII.2015, Jiang, Peng, Tu & Zhou leg." "Holotype / Stenus pseudoflammeus  / Tang, Liu & Niu" [red handwritten label] (SHNU). Paratypes. 3♂♂4♀♀, same data as for the holotype (1 pair in cPut, rest in SHNU); 1♂2♀♀, Xiling Mt., Dali, 1600-2400 m, 30. VII– 4.VIII.1996, Kurbatov leg. ( MHNG).


BL: 4.2-5.1mm, FL: 2.2-2.3 mm.

HW: 0.95-0.98 mm, PL: 0.74-0.78 mm, PW: 0.73-0.76 mm, EL: 0.83-0.87 mm, EW: 0.91-0.95 mm, SL: 0.52-0.54 mm. Head 1.03-1.06 times as wide as elytra, pronotum 1.01-1.03 times as long as wide, elytra 0.84-0.89 times as long as wide.

Similar to Stenus paraflammeus  sp. n. in most aspects, but differs in the following characters: the convex median portion of head extending to the same level of inner eye margins; punctures of forebody relatively smaller, larger punctures on head about as wide as basal cross section of 2nd antennal segment; impressions of pronotum and elytra shallower; punctation of abdominal tergites slightly finer and sparser.

Male. Sternites VII (Fig. 47) and VIII (Fig. 48) similar to those of Stenus paraflammeus  ; sternite IX (Fig. 49) with very long apicolateral projections, posterior margin with short broad serrate median projection. Aedeagus (Figs 51, 52) with median lobe robust, apical sclerotized area triangular; expulsion clasps large; parameres as long as median lobe, distinctly swollen at apex, each with 13-15 setae on apico-internal margins.

Female. Sternite VIII entire; spermatheca (Fig. 50) with basal porch strongly sclerotized, spermathecal duct slightly sclerotized and bent twice.


China (Sichuan).


The species is similar to Stenus paraflammeus  but can be distinguished from the latter by slender pronotum; and it is also very similar to Stenus flammeus  , dissections are necessary to distinguish them.


The specific name is derived from the similar appearance of Stenus flammeus  .