Poecilosomella borborus, Papp, 2002

Papp, L., 2002, Eighteen New Oriental Species Of Poecilosomella Duda (Diptera: Sphaeroceridae), Acta Zoologica Academiae Scientiarum Hungaricae 48 (2), pp. 107-156 : 119-120

Poecilosomella borborus sp. n.

( Figs 6–9 )

Holotype male ( ROM): PHILIPPINES, Negros , Oriental: Cuernos de Negros, 7 km W. Valencia, 8–15 JUL 1987. DC Darling,E. Mayordo. ROM 873062 – 1 ° rainforest edge, 700 m, Malaise w/pans.

Paratypes: 1 female ( ROM): same as for holotype ; 1 male ( HNHM): ibid., 29 JUN – 8 JUL 1987. ROM 873061 .

Measurements in mm: body length 2.08 (holotype), 2.10, 1.90 (paratype male/female), wing length 2.13 (holotype), 2.15, 2.05 (paratypes), wing width 1.02 (holotype), 1.07, 0.92 (paratypes).

Body features, incl. wing and armature of mid tibia, are the same as in P. borboroides ( WALKER, 1860) .

Male abdominal sternite 5 ( Fig. 9 ) asymmetrical, medial hairs similar as in P. borboroides but thick black spinules seem more evenly set. Subepandrial sclerite ( Fig. 6 ) with longer and less broad ventral process than in P. borboroides . Apical part of surstylus ( Fig. 7 ) caudally with 4 thick black teeth, whose size and position are different from those of P. borboroides . Postgonite ( Fig. 8 ) very broad, strongly narrowing and curved apically but apex not definitely demarcated.

Etymology: The specific epithet of this species is borborus , for its very close relation to borboroides .

Distribution: Philippines.

This species is not distinguishable from P. borboroides except on the characteristics of the male postabdomen and genitalia. That is, I cannot differentiate between females. However, males are different in all four morphological parts depicted on Figs 6–9 vs 1–5, i.e. there is no doubt about their identity as different species.

Figures

Figs 6–9.Poecilosomella borborus sp. n., paratype male, postabdomen and genitalia. 6 = right half of subepandrial sclerite, caudal view, 7 = surstylus, lateral view, 8 = postgonite in widest extension, i.e. not lateral view, 9 = sternite 5 and pregenital sternites, ventral view. Scales: 0.2 mm for Fig. 9, 0.1