Colonomyia brasiliana, Published, 2007

DE SOUZA AMORIM, DALTON & RINDAL, EIRIK, 2007, Phylogeny of the Mycetophiliformia, with proposal of the subfamilies Heterotrichinae, Ohakuneinae, and Chiletrichinae for the Rangomaramidae (Diptera, Bibionomorpha), Zootaxa 1535 (1), pp. 1-92 : 15-16

Colonomyia brasiliana , sp. n.

( Figs. 20, 21 )

Diagnosis. Colonomyia brasiliana differs from the other species of the genus by the long area of connection between the gonocoxites mesally, and the extension of the enlarged area of the gonostyle.

Material examined. Holotype (on permanent slide mount), ♂, BRAZIL, State of São Paulo, Salesópolis (Boracea), 14.viii.1947, E. Rabello & Trav. F . Paratypes, 3 ♂♂, same data as holotype, but viii.1949, Lane & Coher col. ( MZSP) ; 1 ♂, same data as holotype, but viii.1947, J. Lane col. ( MZSP) .

Description. Total length, 2.24 mm. Wing length, 2.30 mm. Terminalia length, 0.24 mm; Gc length mesally, 0.12 mm; Gs length, 0.16 mm; aedeagus length, 0.18 mm. Male. Colour. Antenna brown. Palpus light brown. Frons and occiput brown. Scutum and scutellum shining brown, lighter at borders. Pronotum, proepisternum, and proepimeron yellow-brown. Anepisternum brown, katepisternum brown, light brown on ventral third; mesepimeron, laterotergite, and mediotergite brown; metepisternum light brown. Pedicel of halter yellow, capitulum brown. Coxae and femora yellow-brown, fore femur darker; tibiae and tarsi light brown, darker to apex. Segment 1 light brown, segments 2–8 brown. Terminalia brown. Head. Scape, pedicellus, and flagellum brown, scape and pedicellus with few setae, pedicellus almost round. Antenna with 14 flagellomeres, first flagellomere 1.5 times length of second flagellomere; fourth flagellomere 3.2 longer than width; flagellomeres of apical half of antenna with distal neck. Frons brown. Palpus short, not longer than head, with 4 palpomeres, last segments about 1.5 times longer than preceding one; third segment without sensilla. Labella short, with few setulae at apex. Ocelli almost in line. Thorax. Some few, fine setae on postpronotum and proepisternum, no setae on remaining pleural sclerites. Scattered weak setae on mesonotum, with row of longer acrostichal setae; many small scutellar bristles and about 4 longer setae; irregular row of 5 or 6 stronger supra-alar and 2 prescutellar setae. Proepimeron long and slender distally. Anapleural suture very weak. Mesepimeron nearly absent at ventral third, katepisternum apparently fused to laterotergite. Laterotergite slightly projected outward on ventral half; mediotergite high, slightly curved; postnotal phragma short, ventrad to mediotergite, not projected into abdomen. Row of 4 or 5 setae at distal half of pedicel of halter. Wing. Macrotrichia on both faces of wing membrane and on dorsal face of all wing veins. Sc incomplete, short, sc-r absent. R 1 relatively short, reaching C slightly beyond middle of wing. First sector of Rs very short, perfectly transverse, close to basal third of wing; R 5 running quite close to C, abruptly approaching margin at wing apex; C produced beyond R 5, nearly reaching M 1. r-m perfectly longitudinal, very long. Medial fork very weak, nearly vanishing. M 4 detached from CuA at the base, CuA strongly curved to margin at distal fourth. A 1 not traceable. Legs. Tibial spurs 1:2:2, spurs thin, about as long as width of tibiae at apex, mid and hind spurs of equal length. Apex of front tibia with modified area bearing regular row of thin setae, plus some scattered setulae. Strong tooth basally on tarsal claws. First tarsomere more than twice length of second tarsomere of all legs. No regular row of setae distally on mid and hind legs. Abdomen. Sternite and tergite 1 light brown, 2–8 brown, terminalia brown. Terminalia. Gonocoxites fused to each other mesally, with mesal suture, distally projected laterally; syngonocoxite well developed. Gonostyle digitiform apically, slightly curved, wide at basal two thirds, slender apically, with fine, long scattered setae at basal two thirds. T9 wide and short, well sclerotized. T10 present, weakly sclerotized, with cerci lobose.

Female. Unknown

Etymology. The species name refers to the geographical origin of the examined material, Brazil.

Comments. This species diverges from other species of the genus especially in features of the male terminalia. It shares with Colonomyia borea Hippa & Jaschhof, 2004 the long connection between the gonocoxites mesally, but the wide part of the gonostyle basally is more extensive in C. brasiliana , sp. n.

Figures

FIGURES 20–21. Colonomyia brasiliana, sp. n. 20. Thorax. 21. Male terminalia.