Disparoleia cristata, BLAGODEROV & GRIMALDI, 2004

BLAGODEROV, VLADIMIR & GRIMALDI, DAVID, 2004, Fossil Sciaroidea (Diptera) in Cretaceous Ambers, Exclusive of Cecidomyiidae, Sciaridae, and Keroplatidae, American Museum Novitates 3433 (1), pp. 1-76 : 48

Disparoleia cristata , new species

Figures 69 , Plate 7A

DIAGNOSIS: As for genus.

DESCRIPTION: Female. Body length = 2.73 mm, wing length = 2.08 mm. Head: Vertex with group of long erect setae. Scape and pedicel wider than flagellum. Flagellum 14­ segmented, flagellate, flagellomeres longer and narrower apicad. Eyes setose, slightly emarginate at antennal base. Ocelli absent. Clypeus setose. Palpi 3­segmented, 1st palpomere short, 2nd longer, cut obliquely, 3rd longer than length of 1st and 2nd, narrow. Thorax: Scutum with lateral and dorsocentral rows of long setae and short irregular setae. Scutellum with numerous short setae. Antepronotum with long curved setae and several short ones. Anepisternum with 4 light short setae in upper part and very fine hairs at lower apical part. Proepimeron touches katepisternum slightly ventral to anepisternal suture. Mediotergite and laterotergites bare. Metepisternum large, with dorsal margin wider than ventral one. Wing membrane with microtrichia and short macrotrichia. Costa ends beyond tip of R 5, at one­third length between tips of R 5 and M 1. Humeral vein located beyond the MA. Sc short, ends at C before level of M3 base, apex faint. R 1 very short, r­m 3Χ length of R 5. Median veins weak. M 1, base of M 1 and M3 very weak. Base of M3 very proximal, slightly distal to apex of Sc. Crossvein r­m 3Χ length of M2 section, M3 section 3.5Χ that of M2. Base of M 3+4 and CuA fork slightly distal to level of base of M3 section. R, R 1, R 5, M 3+4, and CuA with setae dorsally and ventrally. Leg: Tibial spur formula 1:2:2. Spurs long, 4–5Χ tibia diameter. Mid and hind tibiae with bristles. Empodium absent; tarsal claws with one tooth. Abdomen: Tergites of abdomen setose. Seventh tergite 1.5Χ shorter than 6th, 8th is very short. Cerci 2­segment­ ed, slightly shorter than 6th and 7th segments together. Apical segment round, basal one bacilliform, 2.5Χ apical.

MATERIAL: Holotype AMNH B­0125, female. Myanmar: Katchin , from amber mines near Myitkyina.

ETYMOLOGY: The species epithet is Latin word cristatus, meaning ‘‘tufted, plumed’’, in reference to the group of setae on the vertex.

Figures

Figs. 69–72. Disparoleia and Hemolia. 69. D. cristata, n.sp., holotype AMNH B­0125. 70. H. matilei, n.sp., holotype AMNH B­0132, wing. 71. Male genitalia ventrally. 72. H. glabra, n.sp., holotype AMNH B­0112, wing.