Nedocosia sibirica, 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 : 36-38

Nedocosia sibirica , new species

Plate 5A

DIAGNOSIS: Sc meets R at the level of the base of the stem of M 1+2. Laterotergites setose. Anterior edge of fore coxa bare. Hind legs stout.

DESCRIPTION: Body length = 2.37 mm, wing length = 1.82 mm. Head: Occiput and frons setose. Ocelli three, equal in size; distance of median to lateral ocellus and from lateral ocellus to eye margin equal to twice their diameter. Eye with slight incision at antennal bases. Antennae short, only 10 flagellomeres preserved; flagellomeres cylindrical, widths 1.1–1.5Χ lengths. Face triangular, setose, clypeus ovate, bare. Palpi 5­segmented, short, antepenultimate segment swollen, with medial sensory pit on inner surface. Apical palpomere shorter than penultimate one, both slender, with sparse setulae. Length ratio 1: 3:3:5:5. Thorax: Mesonotum with short trichia and setae of various sizes; setae arranged in 5 rows. Antepronotum with three setae; proepisternum with two on lower part. Scutellum with two very long setae and two smaller ones. Laterotergites with a few tri­

47. N. novacaesarea , n.sp., holotype AMNH NJ­117k.

chia in lower part. Mediotergite bare. Wing: Sc meets R at the level of the base of the stem of M 1+2. R 1 twice the length of r­m. R 5 curved slightly back. C ends far beyond tip of R 5, but does not reach wing apex. Stem of R, R 1, and R 5 with setae. Legs: Anterior edge of fore coxae without setae. Fore tibiae with semicircular anteroapical depressed area, covered with numerous small trichia. Mid tibial spur length 2.5Χ apical diameter of tibia, hind tibial spur 1.5Χ diameter. Hind legs stout, longer than mid legs. First fore tarsomere 2.5Χ longer than second and 0.67Χ length of tibia. Cerci simple.

MATERIAL: Holotype PIN 3311 /665, female. Russia: Taimyr Peninsula , Yantardakh, coll. 1971.

ETYMOLOGY: The species epithet is a reference to the region of origin of the amber.