Stegana (Oxyphortica) yapingi, Chen & Wang, 2004

Chen, Hong-wei & Wang, Bao-cheng, 2004, Stegana (Oxyphortica) Nigripennis Species-Group, With Descriptions Of Four New Species From Southeast Asia (Insecta: Diptera: Drosophilidae), Raffles Bulletin of Zoology 52 (1), pp. 29-36 : 34-35

Stegana (Oxyphortica) yapingi , new species

( Figs. 15-18 )

Material examined. – Holotype - male, MALAYSIA ( BORNEO): Lambir, Sarawak, coll. M. J. Toda, 8 Jan.1999 ( FRC).

Paratypes - MALAYSIA ( BORNEO) : 3 males, 4 females, same data as holotype (1 male, 2 females, FRC; 1 male, 1 female, SCAU; 1 male, 1 female, SEHU); Sabah, Poring : 2 females, 30 Dec.1998 ( ITBC) ; 3 males, coll. M. J. Toda, 16 Mar.1999 ( KPSP) .

Diagnosis. – Paramere broad, triangalar, strongly sclerotized basally ( Figs. 17, 18 ); aedeagus short rod-like, apically hooked, basally with 1 pubescent flap attached to aedeagal apodeme ( Figs. 17, 18 ).

Description. – Thorax: Mesonotum submedially and laterally with black longitudinal stripes, 2 per side; submedial stripes not convergent on prescutum. Pleura with 2 long, black stripes: one below wing, the other from fore coxa to metapleura.

Wing: Black, yellow along posterior margin. Halter: stalk grey; apical part white.

Legs: Mid tibia basally with 2 long, strong postero-dorsal setae.

Abdominal tergites yellow, black on lateral and posterior margins. Sternites black, yellow on lateral margins.

Male terminalia: Epandrium not constricted mid-dorsally, broad laterally; with 1 row of long, strong setae along posterior margin and ca. 3 irregular rows of short setae near postero-ventral margin ( Fig. 15 ). Surstylus lacking setae on outer surface ( Fig. 16 ).

Measurements: BL = 6.10 mm in the holotype (range in 3 males and 3 females paratypes: 5.60-6.70 male, 5.70-7.15 female); ThL = 2.67 mm (2.50-3.00 male, 2.60-3.10 female); WL = 5.50 mm (5.00-6.00 male, 5.00-6.50 female); WW = 2.00 mm (1.80-2.20 male, 1.80-2.20 female).

Indices: arb = 12-13/7-8 (12-13/7-8); avd = 0.85 (0.80-0.90); adf = 3.50 (3.40-4.00); flw = 2.10 (1.90-2.10); FW/HW = 0.30; ch/o = 0.05 (0.06); prorb = 0.75 (0.70-0.80); rcorb = 0.55 (0.50-0.60); vb = 0.30 (0.30-0.35); dcl = 0.40 (0.45); presctl = 0.70 (0.70-0.75); sctl = 1.15 (1.00-1.15); sterno = 0.70 (0.70-0.80); orbito = 1.20 (1.20-1.40); dcp = 0.15 (0.15- 0.17); sctlp = 1.20 (1.10-1.20); C = 3.00 (2.84-3.00); 4c = 0.64 (0.63-0.68); 4v = 1.18 (1.15-1.25); 5x = 0.40 (0.40-0.47); ac = 5.00 (4.70-5.20); M = 0.15 (0.13-0.17); C3F = 1.00 (1.00).

Etymology. – The specific name is in honor of Dr. Yaping Zhang of Kunming Institute of Zoology (KIZ).

Distribution. – Malaysia (Borneo).

Remarks. – This species has special type in paramere, it is easy to distinguish from the other members of the nigripennis species-group.

Figures

Figs.15-18. Stegana (Oxyphortica) yapingi, new species, male genitalia: 3. epandrium (epand) and cercus (cerc); 4. surstylus; 5. hypandrium (hypd), paramere (pm), gonopod (gon), aedeagus (aed) and aedeagal apodeme (aed a) (ventral view); 6. ditto (lateral view) (scale-line = 0.1 mm).