Aphanotrigonum lanceolatum, Nartshuk, 2009

Nartshuk, Emilia P., 2009, Three new species of Chloropidae (Diptera) from southern Sardinia *, Zootaxa 2318, pp. 545-551 : 546-548

Aphanotrigonum lanceolatum sp. nov.

( Figs 1–2)

Type material. Holotype ♂: Italia, Sardegna (Ogliastra), Seui, dint. [= environs] M. Tonneri, Salicca iei su de, UTM 32 S 531228 4413496, 912 m, 5.IX.2006, D. Avesani, M. Bardiani, D. Birtele & G. Nardi leg. ( CNBFVR).

Paratypes: 5 ♂, 2 ♀♀: same data as holotype (3 ♂, 1 ♀ – CNBFVR; 2 ♂, 1 ♀ – ZIN) ; 1 ♂: Italia, Sardegna (Carbonia-Iglesias), Domusnovas, Lago Siuru , UTM 32 S 467069 4357916, 322 m, 12– 17.VII.2006, Malaise trap, D. Avesani, M. Bardiani, D. Birtele, P. Cerretti, M. Mei & D. Whitmore leg. ( CNBFVR) .

Diagnosis. Species similar to Aphanotrigonum hastatum Dely-Draskovits, 1981 ( Fig. 3), described from Afghanistan. The new species differs from the latter by possessing two hind notopleural setae, instead of one as in Aphanotrigonum hastatum , and longer apical scutellar setae, which are inserted closer to each other. There is also a difference in the structure of the male genitalia: cerci wider apart and surstyli narrower.

Description. Male, female. Frons, gena and face yellow. Ocellar triangle black, grey dusted, extending along half the length of frons. Occiput black, grey dusted. Gena as wide as first flagellomere. Antenna yellow; arista black, short pubescent. Setae and setulae of head white. Thorax black, densely grey dusted. Scutum with two depressions along dorsocentral line, which is widened posteriorly before scutellum. Pleura with pruinosity. Notopleural setae 1+2. Scutellum trapeziform, as long as width at base. Apical setae nearly as long as scutellum, subapical setae nearly 1/3 the length of apical setae. Distances between apical setae and between apical seta and subapical one are slightly shorter than the length of subapical seta. All setae and setulae of thorax white. Wing transparent with brown veins. Correlation of length of costal sections 2:3:4 equals 27:14:9. First basal cell not widened. Veins R 4+5 and M parallel. Section of M between r-m and dm-cu about twice as long as dm-cu. Haltere white. Legs: femora black, tibiae black with yellow ends, tarsi yellow. Abdomen brown. Male terminalia ( Figs 1–2): epandrium brown; cerci long and lancet-shaped, widely separated from one another. Surstylus rather narrow.

Body length: 2 mm.

Etymology. The species epithet refers to the shape of the male cercus.