Homoneura (Neohomoneura) tortilis, Shi, Li & Yang, Ding, 2008

Shi, Li & Yang, Ding, 2008, Species of the subgenus Neohomoneura van der Wulp from Hainan in China (Diptera, Lauxaniidae), Zootaxa 1793, pp. 28-46: 35-38

publication ID

http://doi.org/ 10.5281/zenodo.182594

persistent identifier

http://treatment.plazi.org/id/038987B3-FFF7-3B06-FCAC-2A93FBD2FA1F

treatment provided by

Plazi

scientific name

Homoneura (Neohomoneura) tortilis
status

sp. nov.

Homoneura (Neohomoneura) tortilis  sp. nov.

( Figs. 7View FIGURES 1 – 10, 26– 30View FIGURES 26 – 30)

Diagnosis. Spots on R 2 + 3, R 4 + 5 and M 1 + 2 confluent and forming a wide transverse band, extending to extreme vein tip; spot on dm-cu indistinctly confluent with basal extremity of apical spot on R 4 + 5, M 1 + 2 with a small hyaline area beyond dm-cu. Male abdominal tergites 2–6 each with dark posterior margin. Surstylus basally with a small acute process, apically strongly tortile with an acute tip; hypandrium very short and nearly H – shaped.

Description. MALE. Body length 6.1 –7.0 mm, wing length 6.0– 6.6 mm.

Head brownish yellow. Frons about as long as wide and parallel –sided, with 2 brown stripes extending to ocellar triangle; ocellar triangle brownish; oc developed, about as long as anteriormost or; gena about 1 / 5 height of eye. Antenna brownish yellow; 1 st flagellomere 2.0 times as long as wide; arista dark except brownish base, with longest hairs as long as width of 1 st flagellomere. Proboscis yellow, with dark hairs; palpus yellow, with dark hairs.

Thorax brownish yellow. Mesoscutum with 0+ 3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 8 somewhat irregular rows, uniformly short hair –like; prsc longer than 1 st post –sutural dc. Legs yellow; tarsomeres 2–5 brownish yellow. Fore femur with 5 strong pv, 10 pd, and ctenidium with 12 short bristles; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 5-6 a and 1 app; mid tibia with 1 strong preapical ad, 5-6 short pd and 3 strong apv. Hind femur with a row of weak av (only 3 apical bristles distinct) and 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv; 1 st tarsomere with rows of short and dense v. Wing ( Fig. 7View FIGURES 1 – 10) tinged yellowish, spots on R 2 + 3, R 4 + 5 and M 1 + 2 confluent and forming a wide transverse band, extending to extreme vein tip; a small triangular hyaline mark on costa between apical spots on R 2 + 3 and R 4 + 5 distinct or absent; spot on dm-cu indistinctly confluent with basal extremity of apical spot on R 4 + 5, M 1 + 2 with a small hyaline area beyond dm-cu; a spot on dm-cu constricted at middle; subcostal cell brown; costa with 2 nd (between R 1 and R 2 + 3), 3 rd (between R 2 + 3 and R 4 + 5) and 4 th (between R 4 + 5 and M 1 + 2) sections in proportion of 3.7: 1.0: 0.7; r-m before middle of discal cell; ultimate and penultimate sections of M 1 + 2 in proportion of 2.1: 3.2; ultimate section of CuA 1 about 1 / 6 of penultimate. Halter yellow.

Abdomen brownish yellow. Male tergites 2–6 each with dark posterior margin. Male genitalia ( Figs. 26– 30View FIGURES 26 – 30): protandrium semicircular; surstylus long, basally with a small acute process, apically strongly tortile with an acute tip; hypandrium very short and nearly H –shaped, hypandrial apodeme distinct but weak; gonopod slender with many small spines and hairs; aedeagal apodeme slightly shorter than aedeagus, aedeagus with a short triangular apical incision.

FEMALE. Unknown.

Type material. Holotype male, Hainan: Wuzhishan National Nature Reserve, Dengshandao (1000 m), 17. V. 2007, Kuiyan Zhang. Paratypes: 1 male, Hainan: data same as holotype; 2 males, Hainan: Wuzhishan National Nature Reserve, Shuimanxiang (600 m), 16. V. 2007, Jingxian Liu; 1 male, Hainan: Jianfengling National Nature Reserve, Zhiwuyuan (800 m), 5 / 7. IV. 2007, Jingxian Liu; 1 male, Hainan: Bawangling National Nature Reserve, Donger station (1000 m), 21. X. 2007, Ding Yang; 1 male, Hainan: Wuzhishan National Nature Reserve, Guanshantai (600 m), 29. X. 2007, Xingyue Liu.

Distribution. China (Hainan).

Remarks. The new species is very similar to Homoneura (Neohomoneura) incompleta Malloch  from China (Hainan), Viet Nam and Indonesia (Sumatra) in spots on R 2 + 3, R 4 + 5 and M 1 + 2 confluent and forming a wide transverse band, but it can be separated from the latter by M 1 + 2 with a small hyaline area beyond dm-cu and the surstylus strongly tortile with an acute tip. In incompleta  , M 1 + 2 has a large hyaline area beyond dm-cu; and the surstylus is not tortile but with a bifurcated tip ( Sasakawa, 2001).

Etymology. Latin, feminine, ‘ tortilis  ’ = tortile, referring to the tortile surstylus.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Lauxaniidae

Genus

Homoneura