Dacne (Xenodacne) hujiayaoi Dai & Zhao

Dai, Cong-Chao & Zhao, Mei-Jun, 2013, Two new species of Dacne Latreille (Coleoptera, Erotylidae) from China, with a key to Chinese species and subspecies of Dacne, ZooKeys 261, pp. 51-59 : 53-56

Dacne (Xenodacne) hujiayaoi Dai & Zhao sp. n. Figs. 10, 11 12-15 17

Type material.

Holotype:CHINA: Yunnan Prov.: ♂, Nabanhe N.R., Bengganghan, Nanmugahe, 22°06'N, 100°27'E, alt. 1700 m, 13.XI.2008, H Jia-Yao & TANG Liang leg. (SHNU).

Description.

Body (Fig. 10, 11) stout, elongate, length: 3.6 mm; width: 1.5 mm. Body black; legs, palpi and base of antennae reddish-brown; antennal club dark brown. Each elytron with one orange band.

Head width between eyes = 3.5 times eye diameter in dorsal view; punctation coarse, separated by 1-3 puncture diameters; epistome truncate, lacking marginal line on anterior margin; stridulatory files not evident. Antennae (Fig. 15) long, extending behind posterior border of pronotum; antennomere III about 1.2 times as long as IV; antennomere VIII slightly wider than VII, about 1.5 times as wide as long; antennomere IX trapezoidal; antennomere X transverse; antennomere XI almost elliptic; relative lengths of antennomeres II–XI: 9.0: 11.5: 8.0: 8.0: 8.0: 8.0: 7.5: 10.0: 10.0: 17.0. Maxillary and labial terminal palpomeres acuminate, sensory area restricted to apex. Mentum broad with anterior projection, almost triangular, slightly more than 1.5 times wider than long.

Pronotum arched, widest at base (pl/pw = 0.62); slightly narrowing toward apex; lateral margin thickened anteriorly; pronotal anterior margin normal, not projecting forward beyond anterior angles (typical for the subgenus Xenodacne ). Pronotum distinctly punctured medially, finely and closely punctured laterally.

Prosternum with anterior edge straight, lacking marginal bead; posterior process broad, width more than diameter of procoxa; prosternal lines apparently lacking; punctures coarse and close, diameter = eye facet, separated by 0.5-1.0 puncture diameters. Abdomen with distinct coxal lines on first ventrite nearly attaining posterior margin. Legs with tibia not dilated at apex.

Scutellum pentagonal, finely and sparely punctured.

Elytra margined basally; widest at middle, then gradually narrowing to apex; with fine punctures.

Male genitalia (Fig. 12, 14) moderately curved; median lobe short, apically pointed; median strut long, about 1.6 times as long as median lobe. Tegmen with parameres long, flattened, tightly fitting basal piece and each other. Internal sac simple (Fig. 13).

Distribution.

China (Yunnan Province).

Diagnosis.

Dacne hujiayaoi is most similar to Dacne (Xenodacne) zonaria Lewis and it’s subspecies due to similar form and color pattern of the body. Dacne hujiayaoi can be distinguished from Dacne zonaria by body indistinctly shining, eyes large (head width between eyes = 3.5 times eye diameter in dorsal view), the reddish-brown legs and occurs in southwest China. Dacne zonaria has the body distinctly shining, eyes small (head width between eyes> 4 times eye diameter in dorsal view), the black legs and occurs in Japan, Korea, Siberia and Taiwan ( Chûjô and Chûjô 1988).

Etymology.

This species is named in honor of Mr. Jia-Yao Hu, collector of the new species and teacher of the senior author.