Peyerimhoffia hamata Shi & Huang

Shi, Kai, Huang, Junhao, Zhang, Sujiong & Wu, Hong, 2014, Taxonomy of the genus Peyerimhoffia Kieffer from Mainland China, with a description of seven new species (Diptera, Sciaridae), ZooKeys 382, pp. 67-83 : 68-70

Peyerimhoffia hamata Shi & Huang sp. n. Figs 1, 8A, 9

Specimens examined.

Holotype, male. CHINA. Zhejiang Province, Linan, Jincheng, Mt. Xijingshan, sweep-net, 29.IV.2011, Kai Shi [SM01563]. Paratype, ZHEJIANG. 1 male, Qingyuan, Mt. Baishanzu, Wanli-linchang, sweep-net, 24.VII.2012, Lu-Jing Yang [SM01732].

Description (male).

Head dark brown; antenna, thorax, abdomen, and hypopygium brown; palp pale brown; legs pale yellowish-brown; wings fumose. Head (Fig. 1C, D). Eye bridge with 3 rows of facets. Prefrons with 4 setae. Clypeus non-setose. Maxillary palp 1-segmented, with 6 setae. Length/width of fourth flagellomere: 2.07-2.16. Thorax. Anterior pronotum with 3 setae, episternum 1 with 3 setae. Wings (Fig. 8A). Wing length 1.88-2.21 mm, width/length: 0.38-0.41. c/w: 0.61-0.73. R1/R: 0.68-0.90. M, Cu, stM, and r-m non-setose. Legs (Fig. 1E). Front tibia with non-bordered prolateral patch of modified setae. Length of spur/width of foretibia 1.18-1.23. Length of femur/length of metatarsus: foreleg 1.24-1.38. Length of metatarsus/length of tibia: foreleg 0.49-0.56, hind leg 0.44-0.49. Length of hind tibia/length of thorax 1.30-1.42. Hypopygium (Fig. 1A, B). Sternite 10 with one seta on each half.

Distribution.

China, Zhejiang (Fig. 9).

Remarks.

Based on the form of the gonostylus, the new species is similar to Peyerimhoffia vagabunda (Winnertz, 1867). However, the new species can be distinguished in having an irregularly shaped palp (Fig. 1C), the gonostylus distinctly and mesially constricted on dorsal side, the tegmen slightly and smoothly curved, and a lobe-like projecting intercoxal area on the hypopygium. In contrast, Peyerimhoffia vagabunda has a regularly shaped palp, the gonostylus is evenly rounded on the dorsal side, the tegmen is strongly curved, and no lobe-like projecting intercoxal area occurs on the hypopygium.

Etymology.

This species is named after its hook-like gonostylus (Latin adjective hamatus = hooked).