Izleiina spinitibialis, 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 : 43

Izleiina spinitibialis , new species

Figures 55–57 , Plate 6A

DIAGNOSIS: Tibiae with bristles. Gonostyli cylindrical, length 2.5Χ the width, with 3 dark teeth at the apex

DESCRIPTION: Body length = 2.07 mm; wing length = 1.65 mm. Head: Ocelli three, almost in a straight line. Lateral ocelli distant by two diameters from medial ocellus and their own diameter from eye margin. Frontal furrow distinct. Eyes emarginate at antennal base, bare. Frons bare. Face setose. Scape and pedicel without strong setae, rounded, wider than flagellomeres. Eight flagellomeres seen, cylindrical in shape, lengths 1.5Χ width. Clypeus rounded, setulose. Palpi 4­ segmented, basal segment rounded, antepenultimate and penultimate one bacilliform with lengths 3–4Χ width; apical palpomere long. Thorax: Scutellum with 4 long setae. Laterotergites and mediotergite bare. Wing: Sc long, meets C at level of M3 base. R 1 straight, 2Χ length of r­m. R, R 1, R 5, and r­m with a dorsal row of setae. Crossvein r­m almost horizontal. R 5 curved caudally. C ends beyond tip of R 5. M 2 and M 3+4 weak. Base of CuA weak. CuA curved caudally, not sigmoid. Legs: Tibiae with bristles. Abdomen: Genitalia covered by long setae. Ninth tergite rectangular, length 2.3Χ the width. Gonocoxites slightly swollen. Gonostyli almost straight, length 2.5Χ width, with 3 dark teeth at the apex.

MATERIAL: Holotype AMNH NJ­346, male. USA: New Jersey, Sayreville, coll. Y. Goldman, 1995.

ETYMOLOGY: The species epithet is derived from Latin spina, meaning ‘‘spine’’, and tibia, meaning ‘‘leg’’.

Figures

Figs. 52–57. Izleiina, n.gen. 52. I. mirifica, n.sp., holotype PIN 3130/187. 53. Reconstruction of wing venation. 54. Male genitalia. 55. I. spinitibialis, n.sp., holotype AMNH NJ­346, reconstruction of wing venation. 56. Head. 57. Male genitalia.