Homoneura (Homoneura) serrulata Chen & Li, 2024

Chen, Xulong, You, Pengyan, Li, Wenliang & Zhang, Zhisheng, 2024, Seven new species of the subgenus Homoneura Malloch (Diptera, Lauxaniidae, Homoneura) from Jiangjin District, southwestern Chongqing, China, ZooKeys 1206, pp. 45-80 : 45-80

publication ID

https://doi.org/ 10.3897/zookeys.1206.124892

publication LSID

lsid:zoobank.org:pub:A39A64C8-5BE5-4643-AA43-03026F8DD268

DOI

https://doi.org/10.5281/zenodo.12627219

persistent identifier

https://treatment.plazi.org/id/0D01DD62-421D-43DC-8745-9EE3F678F714

taxon LSID

lsid:zoobank.org:act:0D01DD62-421D-43DC-8745-9EE3F678F714

treatment provided by

ZooKeys by Pensoft

scientific name

Homoneura (Homoneura) serrulata Chen & Li
status

sp. nov.

Homoneura (Homoneura) serrulata Chen & Li sp. nov.

Figs 51–55 View Figures 51–55 , 56–60 Chinese name: 锯缘同脉缟蝇 View Figures 56–60

Type material.

Holotype: ♂, China, Chongqing City, Jiangjin District, Dayuandong National Forest Park , Shuijingwan , 28 ° 53 ' 10.96 " N, 106 ° 14 ' 19.32 " E, 717 m, 13. VII. 2022, leg. Xulong Chen. GoogleMaps Paratypes: 1 ♂, China, Chongqing City, Jiangjin District, Dayuandong National Forest Park, Tian’ehu, 28 ° 52 ' 54.45 " N, 106 ° 15 ' 14.53 " E, 728 m, 13. VII. 2022, leg. Xulong Chen.

Etymology.

The specific name refers to the inner process of surstylus with serrulate margin in posterior view.

Diagnosis.

Basal margin of brown apical spot on R 2 + 3 at same vertical level as crossvein dm-cu. Male tergites 2–5 with blackish brown posterior margin. Syntergosternite with a setula around spiracle. Inner process of surstylus evaginable apically with serrulate margin in posterior view, outer process long spine-like. Pregonite crossed at front of phallus in ventral view, postgonite digitiform and curved apically. Phallus tapering apically in lateral view.

Description.

Male. Body length 7.7 mm, wing length 7.8–7.9 mm.

Head (Fig. 51 View Figures 51–55 ) yellow. Frons as long as wide and parallel-sided; ocellar triangle yellow, ocellar seta developed. Gena ~ 1 / 10 height of eye. Antenna yellow, first flagellomere ~ 2.0 × longer than high; arista black except yellow at base, long plumose, with longest ray as long as height of first flagellomere. Proboscis pale yellow, palpus yellow.

Thorax (Fig. 54 View Figures 51–55 ) yellow, with gray pruinosity. 0 + 3 dorsocentral setae, anteriormost postsutural dorsocentral seta far from scutal suture, acrostichal setulae in ten rows. Legs yellow. Fore femur with eight posterior dorsal setae, four or five posterior ventral setae and ctenidium with 14 short setae; fore tibia with one dorsal preapical seta and one short apical ventral seta. Mid femur with five or six anterior setae and one apical posterior seta; mid tibia with one dorsal preapical seta and three strong apical ventral setae. Hind femur with several weak anterior ventral setae and one preapical anterior dorsal seta; hind tibia with one weak dorsal preapical seta and one short apical ventral seta. Wing (Fig. 52 View Figures 51–55 ) slightly yellow, basal margin of brown apical spot on R 2 + 3 at same vertical level as crossvein dm-cu; brown apical spots on R 2 + 3, R 4 + 5, and M 1 slightly confluent and forming pale brown connecting area between apical spots on R 2 + 3, R 4 + 5, and M 1; brown median spot on R 4 + 5 separated from brown cloud-like spot on crossvein dm-cu; subcostal cell pale brown apically; seven short hairs present at base of R 4 + 5; 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) sections in proportion of 7.5: 2: 1.5; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.1: 1.2. Haltere yellow.

Abdomen (Fig. 55 View Figures 51–55 ) yellow, tergites 2–5 with blackish brown posterior margin. Male genitalia (Figs 56–60 View Figures 56–60 ): syntergosternite circular with a trapeziform ventral process, with several dorsal setulae and setula around spiracle. Epandrium broad in lateral view; surstylus consisting of inner process and outer process, inner process evaginable apically with serrulate margin in posterior view, outer process long spine-like. Hypandrium H-shaped. Pregonite acute apically, crossed at front of phallus in ventral view, postgonite digitiform and curved apically. Phallus tapering apically in lateral view. Phallapodeme shorter than phallus.

Female. Unknown.

Distribution.

China (Chongqing).

Remarks.

The new species resembles Homoneura (Homoneura) anadaequata in the habitus, basal margin of brown apical spot on R 2 + 3 at same vertical level as crossvein dm-cu and mesonotum with acrostichal setulae in ten rows [see Gao and Shi 2019: figs 1, 4, 7], but it can be distinguished from the latter by the following: brown apical spots on R 2 + 3, R 4 + 5, and M 1 slightly confluent; syntergosternite with a setula around spiracle; inner process of surstylus evaginable apically with serrulate margin in posterior view; postgonites symmetrical in ventral view. In H. (H.) anadaequata , brown apical spots on R 4 + 5 and M 1 confluent, separated from apical spot on R 2 + 3; syntergosternite without setula around spiracle; surstylus long and furcated in posterior view; postgonites asymmetrical in ventral view [see Gao and Shi 2019: figs 7, 9, 10, 11].

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Lauxaniidae

Genus

Homoneura