Homoneura beckeri
Creators: name: Shi, Li
name: Yang, Ding
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lauxaniidae
Homoneura
Homoneura beckeri

description: Key to all species of the beckeri group in Oriental Region
(females of H. (H.) columnaria, H. (H.) convergens, H. (H.) nigritarsis, H. (H.) yinggeling, and H. (H.) zhangae are unknown)
1. Abdominal tergites 1–5 entirely black or at least tergites 1–2 entirely black; tarsomere 5 not black .......................... 2
- Abdominal tergites 1–5 mostly yellow each with a brown triangular median spot and a narrow transverse band on hind margin; tarsomere 5 at least black or blackish brown on apical 1/3 .................................................................... 4
2. Upper half of occiput with a large brown spot on each side, extending to top margin of eye; abdominal tergites 1–2 entirely black and tergite 3 mostly black except narrow yellow anterior margin, tergites 4–5 black on posterior 1/2 and yellow on anterior 1/2; aedeagus with a pair of falciform dorsal sclerites in ventral view (Fig. 45) ...................... ............................................................................................................................................. H. (H.) occipitalis Malloch
- Upper half of occiput usually without large brown spot on each side, but if brown spot present it does not extend to top margin of eye; abdominal tergites 1–5 entirely deep black; aedeagus not as above .............................................. 3
3. Face mostly black except a yellow spot near ventral margin; abdominal tergite 6 black without spot; aedeagus acuate apically without lateral processes in ventral view ......................................................... H. (H.) bomiensis Gao & Yang
- Face yellow with a pair of black spots; abdominal tergite 6 yellow with distinct brown median spot; aedeagus blunt with a pair of acuate lateral processes in ventral view................................................ H. (H.) immaculata (de Meijere)
4. Face with brown stripe or spot...................................................................................................................................... 5
- Face without stripe or spot............................................................................................................................................ 8
5. Face with one transverse band or two horizontal spots on ventral 1/3 or near ventral margin ....................................6
- Face with a pair of large brown elliptical median spots (sometimes two spots slightly confluent), occupying majority of face............................................................................................................................................................................ 7
6. Antennal 1st flagellomere yellow except dark at tip; hypandrium slightly concave at middle; aedeagus with many apical teeth and a pair of acuate lateral processes in ventral view.......................................... H. (H.) beckeri (Kertész)
- Antennal 1st flagellomere entirely black; hypandrium projecting at middle; aedeagus with a few apical teeth but no acuate lateral processes in ventral view ........................................................... H. (H.) nigrantennata Yang, Hu & Zhu
7. Abdominal tergite 5 with a triangular median spot confluent with a blackish brown transverse posterior band; protandrium without ventral process (Fig. 19); aedeagus with a pair of acuate lateral processes and a pair of furcated dorsoapical processes constricted subapically in ventral view (Fig. 20) .......................... H. (H.) columnaria sp. nov.
- Abdominal tergite 5 with a triangular median spot but no blackish brown transverse band; protandrium with a ventral process (Fig. 24); aedeagus consisting of a basal anterior sclerite with a pair of triangular lateral processes, a pair of basally furcated dorsal sclerites convergent at middle and a pair of hammer-like dorsal processes in ventral view (Fig. 25)............................................................................................................................... H. (H.) convergens sp. nov.
8. Antennal 1st flagellomere unicolor............................................................................................................................... 9
- Antennal 1st flagellomere bicolor............................................................................................................................... 11
9. Antennal 1st flagellomere brownish yellow; aedeagus with a pair of acuate lateral processes, a pair of incurved horn–like apical processes in ventral view (Fig. 60) ...................................................... H. (H.) yinggelingica sp. nov.
- Antennal 1st flagellomere entirely black .................................................................................................................... 10
10. Mesoscutum with brown stripes; tergite 6 with a small brown median spot; surstylus with a knife-like process in lateral view (Fig. 27); aedeagus with a pair of acuate triangular ventral processes and a pair of subuliform dorsal processes in ventral view (Fig. 30) .................................................................................................. H. (H.) flavida sp. nov.
- Mesoscutum without brown stripes; tergite 6 without spot; surstylus consisting of a broad hairy digitiform process and a narrow curved bar-like process in lateral view (Fig. 52); aedeagus with a pair of acuate lateral processes and a pair of wide S–shaped and furcated dorsoapical processes in ventral view (Fig. 55) ....... H. (H.) tortifurcata sp. nov.
11. Wing with a narrow brown stripe or spot on dm-cu ................................................................................................... 12
- Wing clear, without stripes or spots............................................................................................................................ 16
12. Abdominal tergite 6 without brown spot; hypandrium with a pair of short bar–like ventral process, aedeagus with a pair of dorsoapical teeth (Figs. 15–16) ................................................................................ H. (H.) apicomata sp. nov.
- Abdominal tergite 6 with a brown median spot; hypandrium and aedeagus not as above......................................... 13
13. Tarsomere 5 entirely yellow to brownish yellow; surstylus undulating, incurved claviform (Figs. 47–48) ................. ....................................................................................................................................... H. (H.) semicircularis sp. nov.
- Tarsomere 5 partly or entirely brown to black; surstylus not undulating ................................................................... 14
14. Tarsomere 5 brownish black; surstylus only with a stick–like process, slightly curved and narrow apically (Fig. 37); aedeagus with a pair of curved subuliform processes, a pair of acuate lateral processes and a pair of dorsal teeth on dorsal sclerites (Figs. 40–41) ............................................................................................... H. (H.) nigritarsis sp. nov.
- Tarsomere 5 brown on apical 1/2; surstylus consisting of a small subuliform process and a digitifom process; aedeagus with pairs of small acuate processes or teeth on dorsal sclerites ......................................................................... 15
15. Protandrium with a long T–shaped ventral process (Fig. 34); aedeagal with dorsal sclerites contorted in lateral view (Fig. 36) .................................................................................................................................. H. (H.) latissima sp. nov.
- Protandrium without long T–shaped ventral process; aedeagal with dorsal sclerites straight in lateral view .............. ................................................................................................................................ H. (H.) yunnanensis Li, Li & Yang
16. Abdominal tergites 3–5 each with an entirely blackish brown posterior band and triangular median spots, and a triangular median spot confluent with a blackish brown posterior band; surstylus short claw–like, not projecting beyond tip of epandrium in lateral view; hypandrium without lobate ventral sclerites in ventral view; aedeagus with bifurcated sclerite ventrally and two pairs of spine–like processes on dorsal and ventral membranous parts (see Sasakawa, 1992: 173, fig. 19) ............................................................................................ H. (H.) fasciventris Malloch
- Abdominal tergites 3–5 each with a black median spot and a pair of black lateral bands; surstylus long knife–like, projecting beyond tip of epandrium in lateral view (Fig. 62); hypandrium with a pair of lobate ventral sclerites in ventral view; aedeagus obliquely truncate at tip with a small acuate process (Figs. 65–66). H. (H.) zhangae sp. nov.
description: Published as part of Shi, Li & Yang, Ding, 2009, Notes on the Homoneura (Homoneura) beckeri group from the Oriental Region, with descriptions of ten new species from China (Diptera: Lauxaniidae), pp. 1-28 in Zootaxa 2325 on pages 2-3, DOI: 10.5281/zenodo.192037