Izleiina mirifica, 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 : 41-43

Izleiina mirifica , new species

Figures 52–54 , Plate 5F

DIAGNOSIS: Apical palpomere short. Tibiae without bristles. Gonostyli conical, curved inward.

DESCRIPTION: Body length = 1.44 mm, wing length = 1.23 mm. Head: Ocelli three, distance from eye margin equal to two ocellus diameters; distance between each other equal to one diameter. Flagellum 14­segmented, flagellomeres cylindrical, lengths about equal to widths, covered by setulae no longer than one­half flagellomere width. Palpi 4­segmented, three basal segments bacilliform, apical one short and rounded. Occiput, frons, face, and clypeus with short setulae. Thorax: Prescutum and anterior parapsidal suture distinct. Antepronotum with 6 setae, proepisternum with two. Scutum arched. Scutellar setae in rows. Scutellum with two pairs of long setae. Cavity on anterior edge of katepisternum shallow. Laterotergites and mediotergite bare. Wing: Sc meets C just beyond level of base of M3. C ends far beyond apex of R 5. R 1, R 5, and r­m with setae. R 1 length 2Χ that of r­m. R 5 straight. Length of crossvein r­m 0.5Χ length of section M3. M3 weak, can be seen only by absence of microtrichia on wing membrane. M and CuA fork base proximal to the base of r­m. M 3+4 interrupted at base, not reaching wing margin. Legs: Fore coxae with anterior setae, mid coxae with lateroapical ones. Tibiae without bristles. Genitalia: Gonocoxites massive, fused. Gonostyli hornlike and slightly curved, with long setae, colored lighter than gonocoxites.

3+4

MATERIAL: Holotype PIN 3130 /187, male. Russia: Taimyr Peninsula , Yantardakh, coll. 1970.

ETYMOLOGY: The species epithet is a Latin word mirificus meaning ‘‘amazing’’ in reference to unusual combination of characters. The name is feminine.

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.