Pelmatops tangliangi Chen, 2010

Chen, Xiaolin, Zhang, Yanzhou, Li, Jie & Zhu, Chaodong, 2010, A review of stalk-eyed fruit flies (Diptera: Tephritidae: Trypetinae), Zootaxa 2654 (1), pp. 1-16 : 5-6

publication ID	https://doi.org/ 10.11646/zootaxa.2654.1.1
DOI	https://doi.org/10.5281/zenodo.5308706
persistent identifier	https://treatment.plazi.org/id/F9438782-FFF5-FFC8-FF44-F9A53160E406
treatment provided by	Felipe
scientific name	Pelmatops tangliangi Chen
status	sp. nov.

Treatment

Pelmatops tangliangi Chen View in CoL sp. nov.

( Figs. 4 View FIGURES 1–9 , 13 View FIGURES 10–17 , 24 View FIGURES 18–25 , 28 View FIGURES 26–33 , 38, 41 View FIGURES 34–42 , 46 View FIGURES )

Diagnosis. This species generally resembles P. ichneumoneus , but the eye stalk in the male is much longer. The ratio between eye stalk length and thorax length is 3.0–4.0 (but 1.2–2.3 in P. ichneumoneus ), and the ratio between eye stalk length and wing length is 1.1–1.3 (but 0.4– 0.8 in P. ichneumoneus ).

Description. Male: body length 15.8 mm, wing length 14.0 mm. The body predominantly orange-yellow and sub-shining ( Fig. 4 View FIGURES 1–9 ).

Head ( Figs. 13 View FIGURES 10–17 , 24 View FIGURES 18–25 ): Orange-yellow except frons and ocellar triangle yellow-brown to dark brown, with 2 brown bands: 1 extending across anterior edge of frons and anterodorsal portion of eye stalk; 1 on posterior side of eye stalk (bands connected at anterior 3/4 of eye stalk). Head longer than high, strongly prolonged laterally, ratio between eye stalk length and thorax length 3.0–4.0, and ratio between eye stalk length and wing length 1.1–1.3. Palpus spatulate, sparsely covered with fine, yellow setulae. Chaetotaxy reduced: head with medial vertical and postocellar setae present; lateral vertical, ocellar, orbital, frontal and genal setae absent. Antenna distinctly shorter than face, with 1 st flagellomere rounded dorsoapically, about twice as long as wide; arista plumose, longest ray slightly shorter than width of 1st flagellomere.

Thorax almost orange-yellow except for apical part of halter brown to dark brown. 2 notopleural, 1 anepisternal, 1 postsutural supra-alar, 1 postalar, 1 intra-alar and 1 apical scutellar setae.

Wing ( Fig. 28 View FIGURES 26–33 ). Predominantly hyaline tinged with ill-defined pale yellowish-brown markings; pterostigma yellow-brown, narrow and long, about 1.00–1.09 times as long as cell c. Vein R 4+5 setose from base to beyond crossvein R-M.

Legs entirely orange-yellow, slender and long, mid tibia with black apical spine.

Abdomen predominantly orange-yellow, elongate, syntergite 1+2 longer than tergites 3 and 4 combined.

Male terminalia: epandrium large and broad, nearly oval in posterior view ( Fig. 38 View FIGURES 34–42 ); lateral surstylus small and short, apex rounded in lateral view ( Fig. 41 View FIGURES 34–42 ); medial surstylus with 1 black prensiseta. Glans very stout, without distinct acrophallus, but with slender and membranous subapical lobe ( Fig. 46 View FIGURES ).

Female: Unknown.

Distribution. China (Yunnan), India, Vietnam.

Type data. Holotype ♂ ( IZCAS), CHINA: Yunnan: Xishuangbanna 1750m, November 2008, J. Hu & L. Tang . Paratypes: 1♂ ( OMNH). VIETNAM: Vinh Phu Prov.: Tam Dao , 500–1000m, 2 June1997, R. Matsumoto . 1♂ ( BPBM), INDIA: Ranikhet , June 1949, I. M. Newell .

Etymology. This species is named after L. Tang, one of the collectors of the Holotype.

Remarks. This species is generally similar to Pe. ichneumoneus , but it differs from it and all other congeners by the longer eye stalk. Males of both species were collected at two localities in China and India, and no specimens with eye stalks of intermediate length have been collected.