Trypetisoma (Trypetisoma) spinosa, Li & Qi & Yang, 2019

Li, Wenliang, Qi, Ling & Yang, Ding, 2019, First record of the genus Trypetisoma Malloch, 1924 (Diptera, Lauxaniidae) for China with nine species, Zootaxa 4608 (1), pp. 35-64 : 57-62

Trypetisoma (Trypetisoma) spinosa sp. nov.

(Figs. 81–90)

Diagnosis. Occiput with gray pruinescence. Wing (Fig. 82) brown mostly, triangular white spots and brown spots present alternately on anterior margin; posterior margin undate.Abdominal tergites 2–6 each with 5–7 pairs of grayish white basal spots. Male genitalia ( Figs. 86–90 ): gonopod claviform, with 3 long hairs on middle.

Description. MALE. Body length 3.3–3.7 mm, wing length 4.0– 4.3 mm. FEMALE. Body length 3.3 mm, wing length 4.3 mm.

Thorax (Fig. 84) brown, with grayish yellow pruinescence. Mesonotum with 1 narrow brown median band extending from anterior margin to presutural acr, postpronotum with posterior margin surrounded by 1 thin brown band, 3–4 brown spots present between dc and supra-alar seta, a pair of thin black triangular posterior spots extending to scutellum; 1+3 dc, 1st post-sutural dc near transverse scutal suture, presutural dc closer to anterior margin than presutural acr; 1+3 acr (exclude prescutellar acr), in 2 rows, 1st post-sutural acr at transverse scutal suture; without prescutellar acr; dorsocentral acr and acr each with 1 brown basal spot. Anepisternum and katepisternum with gray pruinescence, anepisternum with 2 brown spots near dorsal margin, 1 brown spot near ventral margin, 2 anpest (the strongest one near posterior margin) and 3–4 short hairs; 2 kepst. Scutellum with grayish yellow pruinescence, a pair of brown spots near apex. Leg yellow, femora pale yellow at apex, apical tarsi brown; femora with 1 brown subapical spot on inner surface, tibiae with 1 subbasal circle. Fore femur with 5 pd, 4 pv; fore tibia with 1 long dp, 2 short apv. Mid femur with 8 a, 1 app; mid tibia with 1 strong dp, 1 apv. Hind femur with 2 apv on apical half, 1 preapical ad; hind tibia with 1 dp, 1 short apv. Wing (Fig. 82) brown mostly, triangular white spots and brown spots present alternately on anterior margin; brown area on central of wing extending to outer margin, forming brown longitudinal band throughout wing, and with hyaline spots irregularly; posterior margin undate; costa with 2nd, 3rd and 4th sections in proportion of 8.5: 2.0: 1.9; r-m beind middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 5.1: 2.8; ultimate section of CuA 1 about 1/11 of penultimate section. Halter pale yellow except knob brown.

Abdomen (Fig. 85) blackish brown, shining, but syntergosternite and epandrium yellow; tergites 2–6 each with 5–7 pairs of grayish white basal spots, 5–7 posterior margin setae, and 1 discrete grayish white median longitudinal band (sometimes indistinct); tergites 3–6 with 1 row thin grayish white spots on middle irregularly. Male genitalia ( Figs. 86–90 ): syntergosternite slender in anterior view, with a pair of long ventral process at ventral apex. Epandrium with setae on the brown spots. Surstylus consist of 1 anterior process and 1 posterior process; anterior process long with hairs, digitiform; posterior process short and bifurcated apically. Hypandrium broad, with membranous on apical half, and with long hairs basally. Gonopod claviform, tapering apically, with 3 long hairs on middle. Aedeagus with black process in membrane of middle, curved sclerite at apex, beyond 90° angle between thin sclerite and aedeagus. Aedeagus without apical concave. Aedeagal apodeme as long as 1/2 length of aedeagus.

Type material. Holotype ( HAUST): 1 ♂, CHINA, Yunnan: Longling, Xiaohei Mountain, 2006. V. 16, Yajun Zhu . Paratypes ( HAUST): 1 ♂, CHINA, Yunnan: data same as holotype; 1 ♀ , CHINA, Yunnan: Tengchong Autono- mous region, 2007. V. 31, Xingyue Liu; 1 ♂ , CHINA, Yunnan: Longling, Xiaohei Mountain , 2012. IV. 26, Wenliang Li ;

Distribution. China (Yunnan).

Remarks. The new species is very similar to Noeetomima Enderlein, 1937 from the Australian region, the Oriental region and the Palaearctic region, but it can be separated from the latter in wing type, epandrium and aedeagus.

Etymology. Latin, spinosa , referring to the new species with many black processes on aedeagus.

Figures

FIGURES 86–90. Trypetisoma (Trypetisoma) spinosa sp. nov. Male. 86. syntergosternite and epandrium, lateral view; 87. epandrial complex, posterior view; 88. syntergosternite, anterior view; 89. aedeagal complex, ventral view; 90. aedeagal complex, lateral view. Scale 0.5 mm.