Eupiestus spinifer Fauvel, 1895

Yin, Zi-Wei & Li, Li-Zhen, 2016, Range extension for Eupiestus spinifer Fauvel in China (Coleoptera: Staphylinidae: Piestinae), Zootaxa 4114 (1) : -

Eupiestus spinifer Fauvel, 1895

( Figs 1–4 )

Eupiestus spinifer Fauvel, 1895: 186 (Type locality: Bírmanie, Carin Ghécu, 1300–1400 m; Carin Cheba, 900–1000 m; Carin Asciuii Cheba, 1200–1300 m).

Eupiestus spinifer unicolor Cameron, 1930: 451 (as variety of E. spinifer ; type locality: Rangirum, alt. 6000 feet, Darjeeling; synonymized by Smetana, 2004: 504).

[Complete reference citation see Herman 2001: 1784.]

Material examined. Syntypes: 1 male: ‘Ex-Typis / Coll. et det. A. Fauvel, Eupiestus spinifer Fauv. R.I.Sc.N.B. 17. 479 / Carin Chebà, 900-1100 m, L. Fea V XII-(18)88’ ( RBINS); 1 female: ‘Ex-Typis / Coll. et det. A. Fauvel, Eupiestus spinifer Fauv. R.I.Sc.N.B. 17. 479 / Carin Ghecù, 1300-1400 m, L. Fea II-III(18)88’ ( RBINS). Additional material: 1 male: ‘ China: Yunnan Province, Lincang City (‰±ffi), Yun Hsien (*θ), Manwan Town (( affiffi), Xiyi Villege Committee ( AAIJA *), Shuibatou Villege (*ffi*IJ) (ca. 24°42′N, 100°21′E), 2200 m, 10.ii.2016, Zi-Chun Xiong leg.’ ( SNUC).

Supplementary description. Measurements of male from Yunnan: BL 7.37 mm; HLh 1.48 mm; HL 1.15 mm; HW 1.68 mm; AnL 6.86 mm; length of each antennomeres: I 0.88 mm, II 0.73 mm, III 0.56 mm, IV 0.48 mm, V 0.43 mm, VI 0.62 mm, VII 0.62 mm, VIII 0.64 mm, IX 0.61 mm, X 0.61 mm, XI 0.68 mm; PL 1.38 mm; PW 1.78 mm; EL 1.60 mm; EW 2.15 mm; AL 2.91 mm; AW 1.93 mm, AeL 0.85 mm.

Male. Head, pronotum, and abdomen uniformly black, elytra black ( Fig. 1 ) or in some specimens reddish brown between elytral costae ( Fig. 4 A–B), mouthparts, antennomeres VI–XI, and legs reddish black. Dorsal surface of body coarsely punctate, most punctures with white waxy secretion. Head with anterior margins of frons and antennal tubercles greatly projecting ( Fig. 2 A). Submentum ( Fig. 2 B) sparsely punctate, with two distinct pits, each pit with two setae inside; gular area slightly depressed medially, finely and sparsely punctate. Narrow portion of prosternite along midline finely and sparsely punctate, lateral regions coarsely punctate, paranotal sulci complete. Mesoventrite with microsculpture and shallow punctation. Metaventrite finely punctate in median region, laterally coarsely punctate. Tergite VIII ( Fig. 3 A) entire, narrowing from base to apex, posterior area with six preapical macrosetae; tergites IX–X ( Fig. 3 C) each with several macrosetae posteriorly and numerous small setae at posterior margin of X. Sternite VIII ( Fig. 3 B) transverse, posterior margin sinuate, with row of eight macrosetae preapically; sternite IX ( Fig. 3 D) elongate, weakly sclerotized, posterior margin with many small setae and several curved macrosetae. Aedeagus ( Fig. 3 E–G) symmetric, median lobe strongly narrowed at apical onefourth, with membranous apical portion; parameres in lateral view expanded from base to apex, round apex densely setose; endophallus composed of trapezoidal basal and thin, elongate median sclerites.

Comments. The single male ( Fig. 1 ) from Yunnan has a uniformly black body and relatively shorter frontal projections ( Fig. 2 ), while the syntypes of this species have reddish brown areas between the elytral costae ( Fig. 4 ), and the male has relatively longer frontal projections. Such differences fall into intraspecific variation of this widespread species.

Distribution. This species was previously known from Myanmar, Bangladesh, and India ( Herman 2001), and is here recorded from China (Yunnan) for the first time. New country record.

Figures

FIGURE 1. Dorsal habitus of Eupiestus spinifer, male from Yunnan, southwestern China.

FIGURE 2. Morphological details of Eupiestus spinifer, male from Yunnan, southwestern China. A. Head dorsum, pronotum, and elytra. B. Head venter, prosternum, and meso- and metaventrites.

FIGURE 3. Morphological details of Eupiestus spinifer, male from Yunnan, southwestern China. A. Tergite VIII. B. Sternite VIII. C. Tergites IX and X. D. Sternite IX. E. Aedeagus, in lateral view. F. Same, in ventral view. G. Apical half of median lobe and parameres, enlarged.

FIGURE 4. Syntypes and type labels of Eupiestus spinifer A – C. Male. D – F. Female. (Photo by Camille Locatelli, RBINS)