Trichocoelina dividua Vilkamaa & Menzel 2019, sp. n.

• Main Authors: Vilkamaa, Pekka, Menzel, Frank
• Format: Text
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Sciaridae; Trichocoelina; Trichocoelina dividua; Northwest Territories; Canada; Seta; Menzel; Pekka; Virginia Falls; Nahanni National Park
• Online Access: https://dx.doi.org/10.5281/zenodo.4340478; https://zenodo.org/record/4340478

Trichocoelina dividua sp. n. Figs 4 B, 6 B Material studied . Holotype male. CANADA, Northwest Territories, Nahanni National Park, Reserve Nailicho (Virginia Falls), 61.606°N, 125.758°W, 578 m, 1.VIII.2014, Parks Canada (BOLD Sample ID BIOUG17502-A06, in CNC). Paratypes . CANADA, same data as holotype, 1 male (BOLD Sample ID BIOUG17506-C03, in CBG); same data as previous but 4.VII.2014, 3 males (BOLD Sample IDs BIOUG17107-F02, BIOUG17109-F06 and BIOUG17129-B09, in CBG); same data but 12.VII.2014, 1 male (BOLD Sample ID BIOUG17213-C11, in CBG); same data but 25.VII.2014, 1 male (BOLD Sample ID BIOUG17423-E03, in CBG). Description . Male. Head . Face brown, maxillary palpus pale yellowish. Eye bridge 2–3 facets wide. Face with 10–20 setae. Clypeus with 1–2 setae. Maxillary palpus with 3 segments, 1 st segment longer than 3 rd segment, 2 nd segment shortest; 1 st segment with 1 seta, with a large dorsal patch of sensilla; surface of antennal flagellomeres smooth, body of 4 th antennal flagellomere 2.0x as long as wide, the neck shorter than broad, the longest setae shorter than the width of flagellomere. Thorax . Brown, setae pale. Anterior pronotum with 5–9 setae. Proepisternum with 5–10 setae. Scutellum with 3–4 longer and some short and fine setae. Wing . Fumose. Length 1.5–1.6 mm. Width/ length 0.35–0.40. Anal lobe weak. Veins distinct. c/w 0.65. R 1 /R 0.45–0.7. stM as long as fork of M. r-m as long as bM, bM non-setose, r-m non-setose or with 1 seta. Halter yellow. Legs . Yellow, coxal setae pale. Fore tibial organ forming a rather small patch in depression. Fore tibial spur longer than the tibial width. Abdomen . Pale brown, setae pale, long and fine. Hypopygium (Fig. 4 B). Brown, as abdomen. Intergonocoxal area moderately long, with long, apically bifid setose lobe. Gonocoxa moderately broad, longer than gonostylus, medial margin basally strongly curved, with sparse setosity. Gonostylus (Fig. 6 B) long, apically tumid, impressed; with normal setosity, a long apical tooth, and one megaseta on the dorsal side of apical tooth, one subapical and 3–4 megasetae more basally, megasetae long and slender; with one well-differentiated whiplash seta on ventromedial margin. Tegmen as long as broad, laterally roundish, apically straight, weakly sclerotized; aedeagal teeth not detectable in the specimens studied. Aedeagal apodeme long. BIN . BOLD:AAL7893. Discussion . Trichocoelina dividua sp. n. is especially similar to T. jukkai sp. n. For further discussion of these and similar species, see under Trichocoelina dispansa sp. n. Etymology . The name is Latin, dividua , parted, referring to the apically distinctly divided intergonocoxal lobe of hypopygium. : Published as part of Vilkamaa, Pekka & Menzel, Frank, 2019, Re-classification of Lycoriella Frey sensu lato (Diptera, Sciaridae), with description of Trichocoelina gen. n. and twenty new species, pp. 1-67 in Zootaxa 4665 (1) on pages 23-24, DOI: 10.11646/zootaxa.4665.1.1, http://zenodo.org/record/4000553