Homoneura (Homoneura) hamata, Shi, Li & Yang, Ding, 2014

Shi, Li & Yang, Ding, 2014, Supplements to species groups of the subgenus Homoneura in China (Diptera: Lauxaniidae: Homoneura), with descriptions of twenty new species, Zootaxa 3890 (1), pp. 1-117 : 28-29

Homoneura (Homoneura) hamata sp. nov.

( Figs 8 , 128–132 )

Diagnosis. Antennal 1st flagellomere pale brown. Mesonotum with two wide brown medial stripes. Wing with brown transverse stripe-like apical spot on R2+3 confluent with subapical spot R4+5; brown subapical spot on M1 partly confluent with subapical spot on R4+5; basal edges of brown spots on R2+3 and R4+5 with same vertical level of dm-cu; brown clouds on r-m and dm-cu.

Description. MALE. Body length 2.8–3.2 mm, wing length 2.9–3.2 mm. FEMALE. Body length 2.8 mm, wing length 2.8 mm.

Head yellow. Frons about as long as wide and parallel-sided; ocellar triangle brown; oc as long as anterior or, anterior or longer than 1/2 length of posterior or; gena about 1/4 height of eye. Antenna yellow, 1st flagellomere pale brown, 1.7 times longer than high; arista black except for brownish base, ray pubescent,with longest ray shorter than 1/3 height of 1st flagellomere. Proboscis and palpus yellow.

Thorax brownish yellow with grayish white pruinosity. Mesonotum with two wide pale brown medial stripes, extending to tip of scutellum, 0+3 dc (1st post-sutural dc behind transverse suture), acr in 6 rows; prsc shorter than 1st post-sutural dc. Legs yellow, fore femur with 3–4 strong pv and 5–6 pd, ctenidium with 9–10 short setae; fore tibia with 1 long preapical ad and 1 short apv. Mid femur with 5 a and 1 app; mid tibia with 1 strong preapical ad and 2 strong apv. Hind femur with 1 preapical ad and a row of weak av on apical 1/2; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 8 ) slightly yellow, with brown transverse stripe-like apical spot on R2+3 confluent with subapical spot on R4+5; brown subapical spot on M1 partly confluent with subapical spot R4+5; basal edges of brown spots on R2+3 and R4+5 with same vertical level of dm-cu; brown clouds on r-m and dm-cu, subcostal cell brown apically; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1) sections in proportion of 3.7:1.5: 1 mm; r-m at middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.2; ultimate section of CuA1 about 1/5 of penultimate. Halter pale yellow.

Abdomen brownish yellow. Male genitalia ( Figs 128–132 ): syntergosternite circular with dorsal setulae and two small ventral segments; epandrium nearly rectangular with four pairs of dorsal setae; surstylus consisting of a broad claviform outer process with a triangular basal process on ventral margin and a curved subuliform inner process with acute teeth on dorsal margin; hypandrium nearly H-shaped; pregonite absent, postgonite very short triangular, slightly projecting forward in ventral vew; aedeagus slender in ventral view, but broad at middle with a pair of subuliform middle processes and a hamate apical process in lateral view; aedeagal apodeme shorter than aedeagus.

Type material. Holotype ♂ ( CAUC), CHINA, Hainan Province: Ledong, Jianfengling National Nature Reserve, Tianchi, 800 m, 18. V. 2006, Gang Yao. Paratypes: CHINA, Hainan Province: 1 ♂ ( CAUC), Ledong, Jianfengling National Nature Reserve, Tianchi, 800 m, 18. V. 2006, Hui Dong; 2 ♂, 1 ♀ ( CAUC), Changjiang, Bawangling National Nature Reserve, Dong’er station, 1000 m, 24–25. V. 2007, Junhua Zhang.

Distribution. China (Hainan).

Remarks. The new species is similar to Homoneura (Homoneura) gibbosa Sasakawa from Malaysia in wing pattern, subcostal cell brown apically; frons without brown stripe and mesonotum with brown medial stripes, but it can be separated from the latter by the epandrium lack a gibbosity on inner side of anterior ventral corner; the surstylus having double processes; the hypandrium being H-shaped; the aedeagus having a pair of subuliform middle processes and a hamate apical process in lateral view. In gibbosa , the epandrium has a gibbosity on inner side of anterior ventral corner and the surstylus has a short and erected process on the inner side of epandrium; the hypandrium is U-shaped; the aedeagus has a pair of acute middle processes which points forward, without a hamate apical process ( Sasakawa, 1992).

Etymology. Latin, hamata , meaning hamate, referring to the aedeagus with a hamate apical process; a feminine adjective.

Figures

FIGURES 1 – 12. Wing. 1. H. (H.) bicuspidata sp. nov.; 2. H. (H.) conspicua Sasakawa, 2001; 3. H. (H.) dadongshanica sp. nov.; 4. H. (H.) degenerata sp. nov.; 5. H. (H.) denticulata sp. nov.; 6. H. (H.) falcata sp. nov.; 7. H. (H.) fengyangshanica sp. nov.; 8. H. (H.) hamata sp. nov.; 9. H. (H.) hongmaoensis sp. nov.; 10. H. (H.) interrupta Sasakawa, 2001; 11. H. (H.) jianlingensis sp. nov.; 12. H. (H.) laticosta (Thomson, 1869).

FIGURES 128 – 132. Homoneura (Homoneura) hamata sp. nov. Male. 128. syntergosternite and epandrium, lateral view; 129. syntergosternite, anterior view; 130. epandrial complex, posterior view; 131. aedeagal complex, ventral view; 132. aedeagal complex, lateral view. Scale bar = 0.1 mm.