Oreoderus dasystibialis Li & Yang

Li, Sha, Ricchiardi, Enrico, Bai, Ming & Yang, Xingke, 2016, A taxonomy review of Oreoderus Burmeister, 1842 from China with a geometric morphometric evaluation (Coleoptera, Scarabaeidae, Valgini), ZooKeys 552, pp. 67-89 : 75-77

Taxon classification Animalia Coleoptera Scarabaeidae

Oreoderus dasystibialis Li & Yang sp. n. Fig. 4 A–C

Type material examined.

Holotype, ♂, P.R. CHINA, Hainan, Mt. Jiangfengling, Heiling, 1982.VII.10, leg. Hua Lizhong, Sun Yat-sen University/100/IOZ(E)1658787. Holotype deposited in IZAS. Paratypes: P.R. CHINA: 1♂, Hainan, Mt. Jiangfengling, Wufenqu, 1981.VI.29, leg. Wang (26), Sun Yat-sen University/99/IOZ(E)1658786, (IZAS); 1♂, Hainan, Kwangtung, 1934.IX.1, leg. He Chi, Fan Inst. Biol Peiping/ IOZ(E)902260, (ERC).

Diagnosis.

based on the morphological comparison and PCA analysis of four characters (see below), this new species is close to Oreoderus brevitarsus and Oreoderus bidentatus , but differs from Oreoderus bidentatus by the smaller lateral carinae of the pronotum and can be separated from Oreoderus brevitarsus by the blunt teeth on protibia and the appearance of a thick brush on meso- and metatibia in the male. The aedeagi are very distinctive among these three species. The apex of the parameres in the new species is much wider than in the other two.

Description of the holotype, male.

length 8.5 mm; Width 4.3 mm. Color: light brown to brown. Head: clypeus short, anteriorly straight, with erected setae. Frons densely punctate, covered with testaceous scales. Ocular canthus short, covered with same scales. Antenna with 10 segments, clubs much longer than antennomeres 2-7. Pronotum: widest at the base, lateral margins sinuate. Surface densely punctate, covered with thick testaceous scales. Carinae sharp, highly prominent, ending at 2/3 of the pronotum length; lateral small carinae long, sharp, reaching the lateral margins of the pronotum. Scutellum: triangular, rounded at the apex, covered with testaceous scales. Elytra: with rows of punctate line, covered with same scales as scutellum. Propygidium : covered with lied down scales. Spiracles moderately elevated. Pygidium: triangular form, coarsely punctate, covered with thick lied down oval scales. Venter: coarsely and densely punctate with each point bearing a testaceous scale. A longitudinal groove is visible in the middle of visible sternites I–IV; visible sternite V longer twice than the sternite IV. Legs: slender, covered with testaceous scales except protibia. Protibia extended, bidentate, teeth blunt. Meso- and metatibia with thick brush on the outer margins. Tarsomeres with short setae. Parameres: relatively longer and much broader, the apex is the widest part.

Female.

unknown.

Variability.

paratypes length 7.5-7.7 mm; width 3.8-4.2 mm, and very similar to the holotype.

Etymology.

the new species is named according to its thick brush on meso- and metatibia.

Distribution.

China: Hainan.

Remarks.

only three males were collected in Hainan Island, two of them on Mt. Jianfengling.