Cothornobata paieroi, Li, Xuankun, Marshall, Stephen A. & Yang, Ding, 2015

Li, Xuankun, Marshall, Stephen A. & Yang, Ding, 2015, A review of the Oriental species of Cothornobata Czerny (Diptera, Micropezidae, Eurybatinae), Zootaxa 4006 (2), pp. 201-246 : 219-221

7. Cothornobata paieroi sp. nov.

( Fig. 9 , 25 A)

Diagnosis. Orbital seta absent. Fore tibia and tarsus black. Scutellum slightly angled upwards. Genital fork with basal tubercle distinct and finger-like; arm 1.7X longer than base and slender basally.

Description. Male. Both available male specimens headless. Wing length 7.0–8.0 mm.

Thorax black, brownish only along sutures, lightly pollinose. Scutellum slightly convex, angled dorsally. Setae black; katepisternum with 3 long, strong setae.

Fore leg black with coxa and base of femur orange. Mid femur orange with apical 1/5 or less black, mid tibia brown with base and apex black, mid tarsomere black with basal segment white with black apex. Hind leg similar to mid leg but all tarsomeres black.

Wing generally infuscated except for pale circular area (incomplete pale band) above and just beyond dm-cu; discal band and apical infuscation only slightly darker than base of wing. Bm-cu slightly basal to CuA2, A1+CuA2 1.9X as long as CuA2; distance between apex of R2+3 and R4+5 0.6X as long as M1 beyond dm-cu. Halter white except brownish base of stem.

Abdomen: Tergites 1–5 mostly dull brown, distal margin of tergites 2–4 pale, sparsely microsetulose. Tergite 6 large, shiny; sternite 8 shiny laterally, microsetulose dorsally; epandrium shiny dorsally, miscrosetulose laterally. Cercus and surstylus yellow, contrasting with brown epandrium. Genital fork blackish-brown, with blackish-brown to black setulae; basal tubercle distinct and finger-like, with a cluster of setulae; arm 1.7X longer than base and slender basally ( Fig. 9 B). Pregonite expanded. Postgonite narrow and apically out-turned, without an acute bend ( Fig. 9 CD).

Female (tentatively associated): Head shiny dark reddish-brown except dull pollinose lower orbital plate, microsetulose area behind ocelli, and broad, dull pollinose frontal vitta; frontal vitta very broad, expanding and orange anteriorly; maximum width 3/5 of frontal width. Setae and setulae on head black; one fronto-orbital seta (orbital seta absent). Antenna orange; first flagellomere 1.5X longer than wide; pedicel with a ventral seta length of first flagellomere; arista long-pubescent on basal half, bare distal half. Palpus black. Abdomen brown, tergites 1–5 dull pruinose, tergite 6 and oviscape shiny. Oviscape 1.4X length of tergite 6.

Type material. HOLOTYPE (♂, IEBR) and PARATYPE (1 ♂, DEBU): VIETNAM, Ninh Binh: Cuc Phuong National Park 20°21'13"N, 105°35'14"E, 350–500m, 30.iv-8.v.2013, S.A. Marshall and S.M. Paiero. Further material examined: Same locality as types (5 ♀, DEBU).

Distribution. Oriental: Vietnam (Ninh Binh).

Remarks. Both male types of C. paieroi are headless, but they are associated with five females that have distinctive head features including an exceptionally wide frontal vitta and only a single fronto-orbital seta (orbital seta absent). Collections of Cothornobata from the same time and place included 15 intact specimens of C. breviseta , which differ markedly from the shorter series of C. paieroi in their larger size, paler thoracic pigmentation, different pattern of abdominal pruinosity, more extensive distal black areas on the femora, and the possession of two large fronto-orbital setae.

Etymology. The specific name is a patronym honoring the co-collector, Steven Paiero.

Figures

FIGURE 9. Cothornobata paieroi sp. nov. A, female, left lateral; B, genital fork; C, aedeagus and associated structures male terminalia, left lateral; D, details of aedeagus and associated structures, showing pregonite and postgonite, left lateral.

FIGURE 25. Cothornobata females from Vietnam (Cuc Phuong National Park, May 2013, S. A. Marshall). A, C. paieroi sp. nov., with attached pseudoscorpion, B, C. breviseta sp. nov., ovipositing in sappy decaying wood.