Phortica (Phortica) expansa Chen & Toda, 2007

Chen, Hong-Wei, Toda, Masanori J., Lakim, Maklarin B. & Mohamed, Maryati B., 2007, The Phortica Sensu Stricto (Insecta: Diptera: Drosophilidae) From Malaysia, Raffles Bulletin of Zoology 55 (1), pp. 23-41 : 34-35

Phortica (Phortica) expansa Chen & Toda , new species

( Figs. 36–40 )

Diagnosis. – Aedeagal median rod submedially with asymmetrically bifurcated process ( Fig. 40 ); aedeagal basal bridge laterally with large, somewhat triangular flap ( Fig. 40 ).

Material examined. – Holotype male (terminalia dissected), MALAYSIA: Park Headquarters, Mt. Kinabalu , Sabah, coll. M. J. Toda, 27 Dec.1998 ( KPSP) . Paratypes: 2 males, same data as the holotype except for 7 Mar.2000 and 11 Mar.2000 ( SEHU, ITBC) .

Description. – Male. Thorax: orange brown, with black patches. Scutellum with trifurcate brown patch, pale yellow on tip.

Wing: Slightly smoky, dark on anterior margin.

Legs: All femora partly dark brown. Midleg tibia subapically with 3-4 longer setae on anterior surface.

Abdomen: First to fifth tergites yellow; second tergite with brown patches submedially; third to fifth tergites each with medially slightly protruded, brown band on posterior margin and 1 pair of yellow patches laterally; sixth tergite nearly entirely black except yellow medial line, with expanded lobe on lateral margin ( Fig. 36 ).

Male terminalia: Epandrium pubescent anteroventrally and dorsomedially, with ca. 14 setae on dorsal to posterolateral portion per side ( Fig. 37 ). Surstylus with pubescence basally and several wedge-shaped prensisetae on apical margin to inner surface ( Fig. 38 ). Additional plate between cerci and 10th sternite pubescent, medially connected to 10th sternite ( Fig. 39 ). Posterolateral lobe of hypandrium undeveloped. Paramere expanded distally, pubescent on and around proximal process; apical process with 1 sensillum; medial process with 1 sensillum and 1 tooth ( Fig. 40 ). Vertical process of gonopods apically with ca. 3-5 sclerotized projections per side ( Fig. 40 ). Aedeagus with 2 pairs of bridges; ventral bridge slightly expanded apically ( Fig. 40 ).

Female: Unknown.

Measurements: BL = 4.18 mm in holotype (range in 2 male paratypes: 4.07-4.20); ThL = 1.88 mm (1.84-186); WL = 3.20 mm (3.13-3.20); WW = 1.32 mm (1.30-1.36).

Indices: arb = 4-5/2-3 (4-5/2-3), avd = 0.80 (0.80), adf = 1.50 (1.30-1.50), flw = 1.40 (1.40-1.50), FW/HW = 0.45 (0.40- 0.45), ch/o = 0.06 (0.06), prorb = 1.10 (1.00-1.04), rcorb = 0.50 (0.40-0.50), vb = 0.30 (0.30-0.35), dcl = 0.60 (0.50-0.60), presctl= 0.65 (0.60-0.65), sctl = 1.00 (1.00-1.10), sterno = 0.90 (0.90-0.95), orbito = 1.45 (1.40-1.45), dcp = 0.25 (0.25), sctlp = 1.00 (1.00-1.05), C = 2.14 (2.10-2.16), 4c = 2.10 (1.91- 2.10), 4v = 3.70 (3.46-3.65), 5x = 1.22 (1.13-1.26), ac = 4.20 (4.20-4.46), M = 0.60 (0.68-0.82), C3F = 0.67 (0.70-0.76).

Etymology. – From the Latin word “expansus”, referring to the distally expanded paramere.

Distribution. – Malaysia (Sabah).

Remarks. – This species is very similar to P. (P.) subradiata ( Okada, 1977) in the paramere expanded distally, but can be distinguished from it by the aedeagal median rod (in P. subradiata , based on 3 male specimens from the type locality of Taiwan, China: aedeagal median rod subbasally with 1 pair of symmetric processes; flap of aedeagal basal bridge not so large, with 2–4 acute projections).

Figures

Figs. 36–40. Phortica (Phortica) expansa Chen & Toda, new species, male: 36, sixth tergite in ventral view; 37, epandrium and cercus in lateral view; 38, surstylus in frontal view; 39, tenth sternite and additional plate in frontal view; 40, hypandrium, gonopod, paramere and aedeagus in lateral view.