Phortica (Ashima) eseta Chen

Chen, Hongwei & Máca, Jan, 2012, Ten new species of the genus Phortica from the Afrotropical and Oriental regions (Diptera: Drosophilidae), Zootaxa 3478, pp. 493-509 : 495-496

Phortica (Ashima) eseta Chen , sp. nov.

( Figs 4–7 )

Diagnosis. This species is similar to P. afoliolata Chen & Toda in Chen et al., 2005 from China and Myanmar, and P. xishuangbanna Cheng & Chen in Cheng et al., 2008 from China in the plumose arista; it can be differentiated from them by having the vertical process of gonopods distinctly asymmetric, nearly entirely sclerotized and pointed apically ( Figs 6, 7 ), aedeagus comprised of 2 sclerites entirely separated from median rod ( Figs 6, 7 , aed sc), while in P. xishuangbanna aedeagus is comprised of 3–4 sclerites of different shape.

Description. Frons brown, with thick and dense interfrontal setae. Pedicel and first flagellomere grayish yellow. Arista plumose, not swollen apically in male. Face brown, with yellowish white patches on lower corners. Clypeus medially white, laterally black. Thorax and scutellum orange brown. Legs yellow, with brown spot submedially on each femur and 2 brown rings on each tibia; fifth tarsomere of male foreleg without long seta apically. Abdominal third to fifth sternites longer than wide; sixth sternite with a few long setae laterally. Male terminalia: Surstylus distally with pubescence, several setae and ca. 20 prensisetae on ventral margin to inner surface ( Fig. 5 ). Paramere finely serrated apically, with 3 sensilla submedially ( Figs 6, 7 ). Aedeagus with developed outer membrane ( Figs 6, 7 ).

Measurements. BL = 3.98 mm in holotype (3.44 mm in 13 paratype), ThL = 1.69 mm (1.52 mm), WL = 2.72 mm (2.48 mm), WW = 1.20 mm (1.20 mm), arb = 5/4 (5-6/4), avd = 0.50 (0.50), adf = 1.20 (1.20), flw = 1.50 (1.50), FW/HW = 0.38 (0.40), ch/o = 0.07 (0.07), prorb = 1.10 (1.30), rcorb = 0.50 (0.60), vb = 0.50 (0.35), dcl = 0.50 (0.55), presctl = 0.57 (0.55), sctl = 0.98 (1.00), sterno = 1.00 (0.90), orbito = 1.80 (1.50), dcp = 0.30 (0.32), sctlp = 1.20 (1.10), C = 2.05 (1.94), 4c = 1.58 (1.80), 4v = 2.42 (3.10), 5x = 0.88 (1.14), ac = 4.75 (4.50), M = 0.58 (0.80), C3F = 0.68 (0.67).

Type materials. Holotype 3 ( SEHU), MALAYSIA: Poring, Sabah, 30.xii.1998, MJ Toda. Paratypes: MALAYSIA: 13 ( FRCK), Kubah, Sarawak, 21.i.1999, MJ Toda; 33 (23 in SEHU; 13 in SCAU, No. 120959), Ulu Senagang, Crocker Range, Sabah, 18.x.1999, MJ Toda.

Distribution. Malaysia ( Sarawak, Sabah).

Etymology. A combination of the Latin words: ex + seta, referring to the fifth tarsomere of foreleg without long seta apically in male.

Figures

FIGURES 4 – 7. Phortica (Ashima) eseta Chen, sp. nov., male terminalia: 4. Epandrium, cercus and surstylus (lateral view); 5. surstylus (inner view); 6, 7. hypandrium, parameres, gonopods, aedeagus and aedeagal apodeme (ventral and lateral views).