Leptognoriste microstoma, 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 : 20-22

Leptognoriste microstoma , new species

Figures 23, 24 , Plate 2F

DIAGNOSIS: Mouthparts reduced. R 1 shorter than r­m. M 2 weak at apex. Base of M 3+4 and CuA fork beyond the level of RS base. Male 8th tergite wider than long, rounded.

DESCRIPTION: Body length = 1.33 mm; wing length = 1.24 mm. Head: Occiput with long setae. Pedicel slightly wider then scape and flagellum, flagellomeres barrel­shaped, as long as wide. Palpi 4­segmented, palpomere length ratio 1:2:2:3.5. Thorax: Scutum with long lateral, acrostichal, and dorsocentral setae and short setae between rows. Proepimeron touches katepisternum below the episternal suture. Anepisternum width about equal to height. Laterotergites with long setae. Mediotergite with several long setae ventrally. Mesepisternum with long anterodorsal process, touching anepisternum. Wing length 1.5Χ the abdomen length. R 1 slightly shorter than r­m. Macrotrichia in basal part of wing absent. M 2 weak at apex. Base of M 3+4 and CuA fork beyond the level of RS base. Legs: Fore coxae with dense long anterior setae, mid and hind ones with apical. Hind tibiae without dorsal bristles, only slightly longer than femora. Abdomen. Tergite 9 wider than long, rounded on apex. Sternite I bare. Gonostyli curved at apex.

MATERIAL: Holotype AMNH Bu­429. Myanmar: Katchin , from amber mines near Myitkyina.

ETYMOLOGY: The species epithet is a combination of micros (Greek μικρoζ, or small) and stoma (Greek ơτóμα, or mouth), in reference to the reduced mouthparts.

FAMILY MYCETOPHILIDAE NEWMAN, 1834

SUBFAMILY MANOTINAE EDWARDS, 1925

Figures

Figs. 19–24. Leptognoriste, n.gen. 19. L. davisi, n.sp., holotype AMNH Bu­126a. 20. L. davisi, wing of the holotype. 21. L. davisi, head of the holotype. 22. L. davisi, male genitalia of the holotype. 23. L. microstoma, n.sp., holotype AMNH Bu­429. 24. L. microstoma, male genitalia.