Trichocoelina ithyspina, Vilkamaa & Menzel, 2019

Vilkamaa, Pekka & Menzel, Frank, 2019, Re-classification of Lycoriella Frey sensu lato (Diptera, Sciaridae), with description of Trichocoelina gen. n. and twenty new species, Zootaxa 4665 (1), pp. 1-67 : 29

Trichocoelina ithyspina sp. n.

Figs 8 A , 9 B , 18 C

Material studied. Holotype male. NORWAY, Hedmark, Stor-Elvdal, river Atna Solbakken , 61.746°N, 10.746°E, 380 m, Malaise trap, 30.VI–7.VII.2008, E. Stur (NTNU-VM 201775, BOLD Sample ID TRD-Sci029, in NTNU- VM).

Description. Male. Head. Face and antenna concolorous brown but pedicellus yellow, maxillary palpus pale yellowish. Eye bridge, face and clypeus poorly visible in the specimen studied. Maxillary palpus with 3 segments, 1 st segment longer than 3 rd segment, 2 nd segment shortest; 1 st segment with 1 seta, with dorsal patch of sensilla; surface of antennal flagellomeres smooth, body of 4 th antennal flagellomere 2.9x as long as wide, the neck shorter than broad, the longest setae longer than the width of flagellomere. Thorax. Brown, setae pale. Anterior pronotum with 9 setae. Proepisternum with 11 setae. Scutellum with 4 longer and some short and fine setae. Wing. Fumose. Length 2.3 mm. Width/length 0.45. Anal lobe weak. Veins distinct. c/w 0.65. R 1 /R 0.80. stM shorter than fork of M. r-m longer than bM, bM non-setose, r-m with 1 seta. Halter yellow. Legs. Yellow, coxal setae pale. Fore tibial organ forming a large indistinct patch in depression. Fore tibial spur longer than the tibial width. Abdomen. Pale brown, setae pale, moderately long and fine. Hypopygium ( Fig. 8 A ). Brown, as abdomen. Intergonocoxal area moderately long, with long, apically bifid setose lobe ( Fig. 18 C ). Gonocoxa moderately broad, longer than gonostylus, medial margin basally smoothly curved, with rather long but sparse setosity. Gonostylus ( Fig. 9 B ) long, apically truncate, strongly impressed; with normal setosity, with a rather long apical tooth, with three megasetae subapically near the tooth and two more basally, megasetae long and slender, with distinct basal bodies; with 1 well-differentiated whiplash seta on ventromedial margin. Tegmen broader than long, laterally roundish, apically straight, weakly sclerotized, aedeagal teeth not detectable in the specimens studied. Aedeagal apodeme long.

BIN. BOLD:ACX5966.

Discussion. The gonostylus shown in Figs 8 A and 9 B was slightly distorted in preparation. Trichocoelina ithyspina sp. n. resembles most T. jukkai sp. n. For discussion, see under T. dispansa sp. n.

Etymology. The name is derived from the Greek word ithys, straight, and the Latin word spina, spine, referring to the straight megasetae of the gonostylus.

Figures

FIGURE 8. Hypopygium, ventral. A. Trichocoelina ithyspina sp. n. (holotype). B. T. jukkai sp. n. (holotype). Scale 0.1 mm.

FIGURE 9. Gonostylus, ventral. A. Trichocoelina incrassata sp. n. (holotype). B. T. ithyspina sp. n. (holotype). C. T. magnifica sp. n. (holotype). D. T. jukkai sp. n. (holotype). Scale 0.1 mm.

FIGURE 18. Intergonocoxal lobes of hypopygium, ventral. A. Trichocoelina aemula (holotype). B. T. dispansa sp. n. (paratype). C. T. ithyspina sp. n. (holotype). D. T. jukkai sp. n. (paratype). E. T. planilobata sp. n. (holotype). F. T. semusta sp. n. (holotype). Scale 0.05 mm.