Horaeomorphus hujiayaoi D.-Y. Zhou & S.-J. Zhang

Zhou, De-Yao, Zhang, Su-Jiong & Li, Li-Zhen, 2016, Contributions to the knowledge of the genus Horaeomorphus Schaufuss (Coleoptera, Staphylinidae, Scydmaeninae) in mainland China, ZooKeys 572, pp. 51-70: 62-64

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Horaeomorphus hujiayaoi D.-Y. Zhou & S.-J. Zhang

sp. n.

Taxon classification Animalia Coleoptera Staphylinidae

Horaeomorphus hujiayaoi D.-Y. Zhou & S.-J. Zhang  sp. n. Fig. 9

Type material

(1 ♂). Holotype: CHINA: ♂, labeled 'China: Guangxi Prov., Jinxiu County [金秀县], Mt.Lianhuashan [莲花山], alt. 1000-1150m, 30.vii.2011, Jia-Yao Hu leg.'.


Horaeomorphus hujiayaoi  can be readily separated from all other congeners by its moderately large (2.53 mm), short pronotum with five basal pits connected by a shallow groove, unmodified metatrochanters, median lobe of aedeagus with a blade-shaped, asymmetrical apex bent at an obtuse angle in relation to the long axis of aedeagus and asymmetrical parameres each with ten apical and subapical setae.


Male. BL 2.53 mm; body (Fig. 9A) large, flattened, dark reddish-brown, legs and palpi slightly lighter. Head broadest at large, finely faceted, and moderately convex eyes, HL 0.36 mm, HW 0.50 mm; tempora rounded but not bent, about as long as length of eye in dorsal view; vertex strongly transverse and weakly convex, with pair of small but distinct pits located near posterior margins of supra-antennal tubercles; frons weakly convex; supra-antennal tubercles strongly raised. Punctation on vertex and frons sparse, small but distinct; setae moderately long, sparse. Antennae (Fig. 9B) short, AnL 1.01 mm, relative lengths of antennomeres: 1.2 : 1.0 : 1.3 : 1.0 : 1.0 : 1.0 : 0.9 : 0.9 : 1.0 : 1.0 : 1.9. Pronotum inversely subtrapezoidal , flattened, longer than wide, widest near middle, PL 0.76 mm, PWm 0.61 mm, PWb 0.53 mm; anterior margin rounded; lateral margins rounded near anterior 2/3, then nearly straight up to sub-basal constriction; base with five pits connected by shallow groove. Punctation on disc sparse and fine; dorsal surface glossy; setation moderately long. Elytra elongate, more convex than pronotum, distinctly impressed in middle at about anterior third; widest slightly before middle, narrowing toward apices. EL 1.41 mm, EW 0.93 mm, EI 1.51. Humeral calli distinct. Punctures fine, more distinct than those on pronotum, especially on impressed area, sharply marked and separated by spaces 2 –4× as wide as puncture diameters; setation moderately dense. Hindwings fully developed. Metatrochanter (Fig. 9I) unmodified. Mesotibiae slightly curved and with inner margin expanded near middle to form broad subtriangular tooth. Aedeagus (Fig. 9 C–E) moderately elongate, median lobe with a strongly asymmetrical blade-shaped apex bent at obtuse angle in relation to long axis of aedeagus, AeL 0.59 mm; endophallus (Fig. 9 G–H) with complicated system of variously sclerotized structures; parameres (Fig. 9F) asymmetrical, of unequal lengths, each with ten apical and subapical setae.

Female. Unknown.


This new species has the aedeagal median lobe with an apical blade-shaped projection bent to the left in ventral view and parameres of unequal lengths, characters shared with Horaeomorphus obrus  Vít, 2004 (Nepal: Janakpur, Bagmati). Horaeomorphus hujiayaoi  can be unambiguously separated from its Nepalese congener by the much smaller body (2.53 mm vs 4.3 mm in Horaeomorphus obrus  ) and different structures of the endophallus.


Southern China: Guangxi.


This species is dedicated to Jia-Yao Hu, who collected the type specimen.