Fossil Sciaroidea (Diptera) in Cretaceous Ambers, Exclusive of Cecidomyiidae, Sciaridae, and Keroplatidae
Author
BLAGODEROV, VLADIMIR
Author
GRIMALDI, DAVID
text
American Museum Novitates
2004
2004-02-27
3433
1
1
76
http://www.bioone.org/perlserv/?request=get-abstract&doi=10.1206%2F0003-0082(2004)433%3C0001%3AFSDICA%3E2.0.CO%3B2
journal article
5822
10.1206/0003-0082(2004)433<0001:FSDICA>2.0.CO;2
51eea930-5f0d-43f6-8e03-3093edf36cd7
0003-0082
4712338
Protragoneura platycera
,
new species
Figures 73–75
, Plate 7D
DIAGNOSIS: As for genus.
DESCRIPTION: Body length =
2.49 mm
(
holotype
)/
2.39 mm
(
paratype
); wing length =
1.63 mm
(
holotype
)/
1.93 mm
(
paratype
).
Head
ovate, with row of long erect setae behind eye margin. Scape and pedicel subconical, with numerous apical setae, both black. Flagellum compressed laterally, flagellomeres transverse, widths 1.5–2.5Χ length, densely covered with short trichia. Clypeus setose. Three palpomeres seen; antepenultimate one swollen, obovate, length 2Χ width. Penultimate one attached to antepenultimate palpomere preapically; length 4Χ width, knoblike. Apical palpomere long and narrow. Length ratio 1:1.7:2.5.
Thorax:
Scutum densely covered with short erect trichia, bearing some setae laterally. Antepronotum and proepisternum with long strong setae. Anepisternum with deep cleft. Katepisternum without distinct excavation on anterior margin. Laterotergites, mediotergite bare. Metepisternum with few short trichia ventrally.
Wing
membrane with macrotrichia in distal and posterior part. Sc extremely short, free. All longitudinal veins except R base with setae. M3 reduced, can be traced by setae only. M
1
base reduced. Base of M
3+4
and CuA fork weakened. Small radial cell length 7Χ width. Halters dark, with few short setae.
Legs:
Coxae and femora dark, densely setose, tibiae and tarsi yellowish. Hind tibiae with numerous posterior bristles. Tibial spurs 4Χ tibial diameter.
Abdomen
with 6 visible segments, 7th and 8th very short, retracted. Tergite 9 oval, short, covering the base of gonocoxites. Gonocoxites fused at base, massive, narrowing to apex in distal half. Gonostyli with long ventral lobe bearing a comb of short, knoblike setae; a somewhat shorter, dorsal, bare lobe and internal wide lobe with a row of curved bristles.
MATERIAL:
Holotype
AMNH
Bu135, male;
paratype
AMNH
Bu1076, male.
Myanmar
:
Katchin
, from amber mines near Myitkyina.
ETYMOLOGY: The species epithet is derived from
platy
(Greek πλα´ τυs, broad) and
cerus
(Greek κéραs, horn), in reference to the compressed antennae.