Minettia (Plesiominettia) longaciculiformis, Shi, Li, Gaimari, Stephen D. & Yang, Ding, 2015

Shi, Li, Gaimari, Stephen D. & Yang, Ding, 2015, Five new species of subgenus Plesiominettia (Diptera, Lauxaniidae, Minettia) in southern China, with a key to known species, ZooKeys 520, pp. 61-86 : 62-65

Taxon classification Animalia Diptera Lauxaniidae

Minettia (Plesiominettia) longaciculiformis sp. n. Figs 6-10, 34-35, 44

Type material.

Holotype: ♂ (CAUC), CHINA, Zhejiang: Lin’an, Tianmushan, 19. vii. 2007, Yajun Zhu. Paratypes: 1 ♂, 6 ♀♀ (CAUC), CHINA, Zhejiang: Lin’an, Tianmushan, 18. vii. 2007, Yajun Zhu; 1 ♂ (CAUC), CHINA, Zhejiang: Lin’an, Tianmushan, Huoshandashigu, 21. vii. 2007, Yajun Zhu.

Etymology.

Latin, Longi- is from the Latin, longus, meaning long; -acicula is the diminutive of the Latin noun acus, meaning needle, or pin; -formis is from the Latin forma, meaning shape; referring to the surstylus with 2 pairs of long needle-like processes; a feminine adjective.

Diagnosis. Body yellow. Mesonotum with anteriormost dorsocentral setae situated midway between transverse scutal suture and scutoscutellar suture. Legs yellow, except brown at tip of tibiae and tarsomeres 3-5 pale brown; hind tibia with 1 weak preapical anterodorsal seta. Male genitalia: surstylus with a pair of long needle-like processes in lateral view; phallus round apically with a pair of long processes curved upward in ventral view. Female sternite 8 confluent with tergite 8, projecting on posterior margin with dense setae.

Description.

Male. Body length 6.5-8.0 mm, wing length 6.5-7.0 mm. Female. Body length 7.0-8.5 mm, wing length 6.6-7.0 mm.

Head yellow. Frons with ocellar triangle yellow; ocellar setulae developed, longer than posterior fronto-orbital setae, anterior fronto-orbital setae reclinate, shorter than posterior setae. Face with sparse grayish white pollinosity, without spot; gena about 1/5 height of eye. Antenna entirely yellow, 1st flagellomere 1.7 times longer than high; arista black except yellow at base, pubescent; rays of arista with longest setulae slightly shorter than 1/3 height of 1st flagellomere. Proboscis yellow except brown tip and palpus brownish yellow.

Thorax yellow with sparse grayish white pollinosity. Mesonotum with 0+3 dorsocentral setae (anteriormost dorsocentral setae situated midway between transverse scutal suture and scutoscutellar suture), acrostichal setulae in 8 rows; a pair of long acrostichal setulae present in front of prescutellar setae, prescutellar setae shorter than 1st postsutural dorsocentral setae; 1 strong intra-alar seta and 1 weak intra-alar seta situated at almost equal intervals on line between supra-alar setae and posterior dorsocentral setae; 1 anepisternal seta, 2 katepisternal setae. Scutellum yellow. Legs yellow except brown at tip of tibiae and tarsomeres 3-5 pale brown. Fore femur with 6 posteroventral setae and 9 posterodorsal setae, fore tibia with 1 short preapical anterodorsal seta and 1 short apicoventral seta. Mid femur with 8 anterior setae and 1 apical posterior seta; mid tibia with 1 strong preapical anterodorsal seta and 2 strong apicoventral setae. Hind tibia with 1 weak preapical anterodorsal seta and 1 short apicoventral seta. Wing (Fig. 44) slightly yellow, pale brown along costal margin and a brown stripe on dm-cu; 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 5.5:1.5:1; r-m at middle of discal cell; ultimate and penultimate sections of M1 in proportion of 1:1.5; ultimate section of CuA1 about 1/10 of penultimate. Halter yellow.

Abdomen yellow with sparse grayish white pollinosity. Male genitalia (Figs 6-10): syntergosternite 7+8 circular with long irregular ventral process and many dorsal setae; epandrium broad, far shorter than syntergosternite 7+8, narrow apically; surstylus with a pair of long needle-like processes in lateral view; hypandrium inverted–U shape, hypandrial apodeme indistinct; pregonite and postgonite absent; phallus slender, longer than 1/2 length of abdomen, round apically with a pair of long subuliform processes curved upward in ventral view; phallapodeme short, projecting forward. Female sternite 8 confluent with tergite 8, projecting on posterior margin with dense setae; spermathecae 1+2, nearly elliptical, each with irregular short ridges. (Figs 34-35).

Remarks.

The new species differs entirely from other species of the subgenus in the surstylus having a pair of very long needle-like processes and the phallus being brown, longer than 1/2 length of abdomen in ventral view.

Distribution.

China (Zhejiang).