Homoneura (Homoneura) abnormis Gao & Yang 2004, new species
Creators: name: Gao, Caixia
name: Yang, Ding
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lauxaniidae
Homoneura
Homoneura abnormis

description: Homoneura (Homoneura) abnormis, new species   
(Figs. 1-6)  
 Material examined. – Holotype – male, Guangxi: Tianlin, Linaoshan (1100m), 14 Aug.2002, coll. Ding Yang (CAU).   
Paratypes – 2 males, 3 females, same data as holotype (CAU & ZRC).  
 Diagnosis. – Wing with 6 brown spots on tip of R 2+3 to M 1+2, preapical section of R 4+5, r-m and m-m; subcostal cell slightly darkened apically (Fig. 1).   
 Description. – Body length 3.8-4.0 mm (male) or 3.9-4.6 mm (female), wing length 3.6-4.3 mm (male) or 3.9-4.3 mm (female).   
Head yellow, with yellow dust. Frons about as long as wide and parallel-sided, with 2 pale brown stripes; ocellar triangle dark; oc (ocellar bristle) shorter than anterior or (orbital bristle); face without spots; cheek about 1/6 height of eye. Antenna yellow; 3rd segment 1.5 times as long as wide; arista black except yellow base, with longest hairs shorter than width of 3rd antennal segment. Proboscis yellow, pale yellow apically, with black and yellow hairs; palpus yellow, with black hairs.  
Thorax yellow, with yellow dust, 0+3 dc (dorsocentral bristle), acr (acrostichal bristle) in 7 rows, prsc (prescutellar acrostichal bristle) about as long as 1st post-sutural dc. Legs yellow. Fore femur with 3 posterior ventral bristles, 4 posterior dorsal bristles, and ctenidium with 10-12 short bristles. Mid femur with 6 anterior bristles; mid tibia with 3 spurs. Wing pale yellow, dark on apex of subcostal cell, tip of R 2+3 to M 1+2, preapical section of R 4+5, r-m and m-m; costa with R 2+3, R 4+5 and M 1+2 sections in proportion of 8.5:2.6:1.6; r-m before middle of discal cell; ultimate section of M 1+2 about as long as penultimate; ultimate section of M 3+4 about 1/10 of penultimate. Halter yellow.  
Abdomen yellow, with yellow dust, with dark spot at middle of tergites 3-9 and on edge of tergites 3-6 dark in male; with dark spot at middle of tergites 3-9, on two sides of sternites 5-8 and edge of tergites 3-7 dark; in female, sternites 9 also dark except sides. Male genitalia (Figs. 2-6): Protandrium rather wide, forming an incompletely sclerotized band (Fig. 3), and without setulae around spiracle; surstylus elongated and narrowing apically, with anterior processs short and baggy; hypandrium with apodemes large and wide, gonopod long and with long bristles; aedeagus long, pointed apically, without apical incision (Fig. 6).  
 Etymology. – The species is named after the abnormal shape of the surstylus.   
 Distribution. – China (Guangxi).   
 Remarks. – The new species is somewhat similar to Homoneura (Homoneura) variinervis (Kertész, 1913) from Taiwan, but can be separated from the latter by the preapical spot on R 4+5 located just above m-m. In variinervis, the preapical spot on R 4+5 is located beyond level of m-m (Sasakawa & Ikeuchi, 1982, 1985).
description: Published as part of Gao, Caixia & Yang, Ding, 2004, A Review Of The Genus Homoneura From Guangxi, China (Diptera: Lauxaniidae), pp. 351-364 in Raffles Bulletin of Zoology 52 (2) on page 352, DOI: 10.5281/zenodo.4619516