Poecilosomella paraciculata, Papp, 2002

Papp, L., 2002, Eighteen New Oriental Species Of Poecilosomella Duda (Diptera: Sphaeroceridae), Acta Zoologica Academiae Scientiarum Hungaricae 48 (2), pp. 107-156 : 131-133

Poecilosomella paraciculata sp. n.

( Figs 35–38 )

Holotype male ( ROM): INDONESIA, Sumatra, W. Sumatra: Kerinci-Seblat Nat. Pk., trail to L. Tujuh, 14 SEP 1989. B Hubley, DC Darling, ROM 893074 – 1 ° rainforest, 1640 m, screen sweep, 1°42’N, 101°19’E.

Paratypes ( ROM, 1 male, 1 female in HNHM) : 2 males, 2 females: same data as holotype ; 2 males, 2 females ( ROM, 1 male in HNHM): Sumatra, Aceh, Gunung Leuser Nat. Pk., Ketambe Res. Sta., 9–21 SEP 1989, DC Darling, ROM 893087 – 1 ° rainforest. Young forest, Terrace 3, closed canopy, 350 m, 3° 41’N, 97° 39’E, Malaise trap head .

Measurements in mm: body length 1.86 (holotype), 2.00 (paratype males), 1.90–1.95 (paratype females), wing length 1.63 (holotype), 1.82–1.85 (paratypes), wing width 0.79 (holotype), 0.79–0.82 (paratypes).

Frons reddish brown, orbitalia, interfrontal lines silvery. Facial plate reddish yellow. Two pairs of subequal orbital setae and three pairs of medium long ifr. Genal bristle reduced, not distinguishable from peristomal hairs. Scape lighter brown, pedicel and first flagellomere reddish, latter somewhat shorter than pedicel and scape combined (0.112 vs. 0.125 mm). Flagellomere with long (0.025 mm) cilia)

Wings without vein appendage on R 2+3 subapically. Second costal section somewhat shorter than (subequal to) third section (on holotype 40 mm vs. 0.50 mm). A brown diffuse spot around humeral vein, between R 1 and Rs fork, around upcurving section of R 2+3, around apical part of R 4+5 and a lighter brown patch from R-M cross-vein down to Cu. Costal hairs short and less dense. Costa overruns apex of R 4+5 by a distance of the length of dM-Cu cross-vein.

Fore tarsomeres, except fore basitarsus, clear white. Legs dark brown, apices of femora light. All tibiae with broad medial and apical light rings. Male mid tibia with a short curved ventroapical spur (much shorter than tibial diameter subapically) but otherwise ventral hairs not long (shorter than tibial diameter). No mid ventral or anterior seta on mid tibia. Mid and hind tarsi brown with yellow apices, hind 3rd tarsomere clear yellow.

Male sternite 6 ( Fig. 36 ) of an intricate form with a dark digitiform process medially on the left side. Sternite 5&6 complex with a separated medial quadrate hairy process. Epandrium comparatively large with medium long setae. Cerci peculiar, with a number of long and thick setae ventrally ( Fig. 38 ). Subepandrial sclerite ( Fig. 38 ) with a pair of characteristic ventral process which bear long hairs. Male surstylus ( Fig. 35 ) with two long, deeply separated lobes, medial lobe long digitiform but blunt. Postgonite ( Fig. 37 ) rather long with a long apical process, which bear short thornlets only. Anterior lobe of postgonite hairy, medial part with adpressed scales i.e. not hairs.

Female terminalia not studied.

subepandrial sclerite, caudal view. Scales: 0.2 mm for Fig. 38 , 0.1 mm for Figs 35–36, 38

Distribution: Sumatra ( Indonesia)

P. paraciculata sp. n. seems to be close to P. aciculata , though it is identifiable without any use of the male genital characters (see key below).

Figures

Figs 35–38. Poecilosomella paraciculata sp. n., paratype male, genitalia.35 = surstylus in widest extension, i.e. in subcaudal view, 36 = sternite 6, ventral view, 37 = postgonite, lateral view, 38 =