New range extensions for the Canadian Chironomidae fauna from two urban streams Author Namayandeh, Armin Taxanama Corp. 25 Mabelle Ave, Toronto, ON, M 9 A 4 Y 1, E-mail:. Author Beresford, David V. Department of Biology, Trent University, Peterborough, Ontario, E-mail:. text CHIRONOMUS Journal of Chironomidae Research 2017 2017-12-18 30 30 76 80 https://www.ntnu.no/ojs/index.php/chironomus/article/view/2415 journal article 53582 10.5324/cjcr.v0i30.2415 3b710530-f8b1-4075-872f-be9fa5d7258b 2387-5372 7995301 Rheosmittia spinicornis (Brundin, 1956) Pharate male (n=3). Fig. 2 a-b. Diagnosis. Antenna with 11 flagellomeres, AR=0.47. Thorax with prominent scutal tubercle ( Fig. 2a ). Inferior volsella digitiform and directed posteriorly ( Fig. 2b ). Pupa (n=3). Fig. 2c, d . Figure 2. Rheosmittia spinicornis (Brundin, 1956) pharate male a-b, pupa c-d. a) Thorax, arrow indicates the location of scutal tubercle, b) Hypopygium, arrows indicate the inferior volsella, c) Cephalothorax, d) Anal lobes and genital sacs. Description. Exuviae hyaline ( Fig. 2c ). Frontal setae absent. Precorneal seta 1-3 Ls =43.3, 51.0, 33.1 μm long. Dorsocentral setae about 38.8-47.8 μm long. Anal lobe and genital sac ( Fig. 2d ). Notes. A detailed description of species is given by Cranston and Saether (1986) . Study sites. Bowmanville Creek , Bowmanville , Ontario ; 43° 54’ 22.90” N 78° 41’ 12.8” W . Lynde Creek , Whitby , Ontario ; 43° 54’ 42.27” N 78° 57’ 52.4” W . Ecology and habitats. Larvae of Rheosmittia are psammophile ( Cranston and Saether 1986 ). Nearctic distribution: Canada (British Colombia , Northwest Territories, 1 st record Ontario, Saskatchewan, Yukon Territory). Notes. Originally, this s pecies was reported only from the Palearctic region ( Ashe and O’Connor 2012 ); however, according to entries in the Barcode of Life Data Systems ( Ratnasingham and Hebert 2007 ), this species also occurs in British Columbia , Northwest Territories , Saskatchewan and Yukon Territory . Considering our new record in Ontario , this species is probably widespread across the northern, western and central region of Canada .