Phortica (Allophortica) sexpunctata (Séguy), Seguy

Prigent, Stéphane & Chen, Hong-Wei, 2008, A survey of the genus Phortica Schiner from Kenya, Africa (Diptera: Drosophilidae), Zootaxa 1773, pp. 18-30 : 19-20

Phortica (Allophortica) sexpunctata (Séguy)

( Figs 1–2 )

Drosophila sexpunctata Séguy 1938: 352 .

Specimens examined. 2ɗ, Kakamega equatorial forest, KENYA, 11–23.x.2002, S. Prigent.

Diagnosis. Paramere (outer paraphysis) deeply bifurcated from base, pointed on each apical parts: anterior branch shorter, expanded submedially; posterior branch submedially with 2 acute projections ( Fig. 2 ); aedeagal median rod well expanded distally, with 2 pairs of acute projections medially and laterally ( Fig. 2 ).

Description. (Supplementary) Male terminalia: Epandrium nearly entirely pubescent, with 4 setae near posterior margin on each body-side ( Fig. 1 ). Surstylus with dense pubescence, and approximately slender 20 prensisetae on inner margin ( Fig. 1 ). Sternite X (decasternum) absent. Hypandrium without lobe-like processes posterolaterally. Vertical process of gonopods with 2 pairs of small projections submedially and laterally ( Fig. 2 ). Outer membranous tube of aedeagus developed ( Fig. 2 ).

Measurements. BL = 2.70–2.73 mm (range in 2ɗ specimens); ThL = 1.26–1.30 mm; WL = 2.48–2.50 mm; WW = 1.20–1.25 mm. Indices: arb = 4–5/3–4, avd = 0.80–0.83, adf = 1.37–1.40, flw = 1.45–1.50, FW/ HW = 0.40–0.45, ch/o = 0.06–0.07, prorb = 0.98–1.07, rcorb = 0.80–0.85, vb = 0.20–0.23, dcl = 0.60–0.63, presctl = 0.65–0.68, sctl = 1.00, sterno = 1.00, orbito = 1.85–1.90, dcp = 0.24–0.25, sctlp = 1.20–1.24, C = 2.08–2.15, 4c = 1.25–1.34, 4v = 2.20–2.43, 5x = 0.91–1.09, ac = 2.50–2.67, M = 0.55–0.67, C3F = 0.60–0.73.

Distribution. Kenya.

Remarks. This species certainly belongs to subgenus Allophortica, because it is very similar to P. (A.) vumbae ( Tsacas, 1990) in the surstylus with numerous prensisetae, paramere lacking sensilla and the aedeagal apodeme very strong, but can be distinguished from it by the paramere and aedeagal median rod (in vumbae : paramere slightly bifurcated apically; aedeagal median rod apically not expanded, without any projections).

Figures

FIGURES 1, 2. Phortica (Allophortica) sexpunctata (Séguy, 1938) ♂: 1. epandrium (epand), cercus (cerc) and surstylus (sur) (lateral view); 2. hypandrium (hypd), gonopods (gon), paramere (pm), aedeagal median rod (aed); aedeagal outer membranous tube (aed om) and aedeagal apodeme (aed a) (lateral view) (all scale-line = 0.1 mm through this paper).