Roederiodes distinctus Chillcott 1961

• Main Author: Sinclair, Bradley J.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Empididae; Roederiodes; Roederiodes distinctus; Churchill; Fort Simpson; Mackenzie Basin; Northwest Territories
• Online Access: https://doi.org/10.5281/zenodo.8030474; http://treatment.plazi.org/id/E6066E10FFB57737FF0CF969FB7DFA60

Roederiodes distinctus Chillcott (Figs 8, 20, 33) Roederioides distincta Chillcott, 1961: 425. Type locality: South St. Vrain Creek, Colorado, USA. Roederiodes distinctus : Melander, 1965: 468 [catalogue]; Wilder, 1981: 419 [review]; Sinclair, 1995: 698 [species list]. Type material examined. PARATYPES: “ So. St. Vrain Creek [40°13′N 105°52′W]/ Boulder Co. Colo. / IX.8.[19]50”; “ W.W. Wirth / Collector”; PARATYPE/ Roederioides ♀ / distincta/ Chillcott/ No. 7187 [yellow label, dissected]” (1 ♀, CNC; 1 ♀, USNM). Additional material examined. CANADA. Manitoba: Churchill, Eastern Ck, Launch Rd, 58°44.75′N 93°53.72′W, 12.vii.2009, JMC, CNC103452, CNC103453, CNC103454 (2 ♁, 1 ♀, barcoded, CNC); Cowan Ck, 4 km S & 2 km W Cowan [52°01′N 100°39′W], UTM grid: 14ULN855612, 9.ix.1986, R. G. Beutel & R. E. Roughley (1 ♀, CNC). Northwest Territories: Mackenzie Basin, Trail River [62.10005°N 122.19286°W], 23.ix.1971, Basket 3, CNC Lot 71–741 (1 ♁, CNC); Fort Simpson, Pipeline Survey, MR2–35030772 DE [62°06′N 122°11′W] (1 ♁, 1 ♀, CNC); same data except, MR3-35120972 DE (4 ♁, 1 ♀, CNC); same data except, MR3–352606772 DE (1 ♁, CNC); Martin River, FWI, Pipeline Project, 20.vi.1972, MR1.35 DE (3 ♁, 3 ♀, CNC). USA. Colorado: Larimer Co., Stonewall Ck, jct Hwy 287 [40.826170 -105.242309], 22.xi.1994, S. Fitzgerald (11 ♁, 4 ♀, CNC). Utah: Wayne Co., Capitol Reef NP, Pleasant Ck [38°11′N 111°10′W], 2–7.viii.1993, JFM (1 ♁, CNC); Wayne Co., Pleasant Ck, 5800 ft, 27.iv.1994, JFM (1?, CNC). Recognition. This species is distinguished by the distinct crossvein at apex of cell dm, longer than crossvein r-m, five distinct dorsocentral setae, scutellum and prescutellar depression with bluish pruinescence and clasping cercus tapered, with sharply pointed setae. Redescription. Wing length 2.9–3.8 mm. Male. Face and gena with bluish pubescence. Ocellar setae divergent, subequal to pprn; vertical seta as long as ocellar seta. Antenna with short stylus, subequal to length of postpedicel; postpedicel onion-shaped, prolonged apically. Length ...