Stegana (Oxyphortica) spinosa Cheng and Chen, 2017

Wang, Nannan, Zhang, Yuan, Cheng, Yu & Chen, Hongwei, 2017, Nine new species of the subgenus Stegana (Oxyphortica) from the Oriental region, with morphological and molecular evidence based on Chinese species (Diptera: Drosophilidae), Journal of Natural History 51 (33 - 34), pp. 1943-1970 : 1966-1967

Stegana (Oxyphortica) spinosa Cheng and Chen , sp. nov.

Diagnosis

Surstylus subbasally with irregular 1 row of ca. 6 somewhat thickened setae along inner margin, distally with two prensisetae ( Figure 15 (b)); aedeagus erect and broadened, acute apically, its medial part sligtly spinulose and with a pair of thorn-like processes, one sheaf of setulae on submedial portion per side ( Figure 15 (c)).

Description

Body colour had been almost lost, because preservation in 70% ethanol for long time. Male terminalia: Epandrium slightly prominent on posterolateral corners, with pubescence and dense setae ( Figure 15 (a)). Cercus lacking pubescence ( Figure 15 (a)). Surstylus basally with a few small setae, submedially curved, distally with ca. 12 long setae except prensisetae ( Figure 15 (b)). Hypandrium with one pair of large flaps anteromedially ( Figure 15 (c)). Parameres slender, fused basally, with ca. 7–8 sensilla ( Figure 15 (c)). Gonopods low-reaching, fused with each other ( Figure 15 (c)).

Measurements

BL = 2.83 mm in holotype, ThL = 1.52 mm, WL = 2.80 mm; WW = 1.18 mm, arb = 8/5, avd = 0.60, adf = 2.27, flw = 2.00, FW/HW = 0.30, ch/o = 0.09, prorb = 0.74, rcorb = 0.71, vb = 0.29, dcl = 0.48, presctl = 0.48, sctl = 1.02, sterno = 0.83, orbito = 1.50, dcp = 0.29, sctlp = 0.95, C = 3.12, 4c = 1.00, 4v = 2.36, 5x = 1.67, ac = 5.00, M = 0.70, C3F = 0.82.

Type specimen

Holotype male ( KPSP), Malaysia: Mahua , Sabah, 4 October 1999, ex tree trunk, MJ Toda.

Etymology

From the Latin word: spinosus (thorny), referring to the aedeagus with numerous spinules.

Distribution

Malaysia (Sabah).

Figures

Figure 15. Stegana (Oxyphortica) spinosa Cheng and Chen, sp. nov., male terminalia. (a) epandrium, cercus and surstylus (lateral view); (b) surstylus (ventral view); (c) hypandrium, parameres, aedeagus and aedeagal apodeme (ventral view). Scale lines = 0.1 mm.