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.