Sublettea coffmani ( Roback, 1975 )

Namayandeh, Armin & Beresford, David V., 2017, New range extensions for the Canadian Chironomidae fauna from two urban streams, CHIRONOMUS Journal of Chironomidae Research 30 (30), pp. 76-80 : 78

Sublettea coffmani ( Roback, 1975)

Pupa (n=2). Figs. 3 a-e.

Description. Thoracic horn with long apical filaments ( Fig. 3a ). Robust patches of spines present on segments II-V ( Fig. 3b ), spine patches on segment IV and V with longer lateral spines ( Fig. 3c ). Paired spine patches are located in the anterior corners of the ventral intersegmental membrane of sternite VIII. ( Fig. 3d ). Anal lobe and genital sac as in Fig. 3e ; anal lobe with robust patches of spines and long setae ( Fig. 3e ).

Notes. A detailed description of this species is given by Roback (1975). This is the only species of Sublettea described from the Nearctic.

Study sites. Lynde Creek, Whitby, Ontario; 43° 54’ 42.27” N 78° 57’ 52.4” W.

Ecology and habitats. Larvae of Sublettea inhabit lotic habitats with a preference for cool, clear and fast flowing streams (Ashe and O’Connor 1994). Larvae of S. coffmani construct soft, non-transportable cases of fine sediments, which they attach to stream substrates ( Roback 1975).

Nearctic distribution: Canada (New Brunswick, 1 st record Ontario); USA (Alabama, Georgia, Kentucky, Mississippi, North Carolina, Pennsylvania, South Carolina, Tennessee, Maryland, Virginia, and West Virginia).

Figures

Figure 3. Sublettea coffmani (Roback, 1975) pupa. a) Thoracic horn, b) Abdominal tergite I-V, c) Spine patches on segment IV, d) Spine patches on ventral side of sternite VIII (arrows), e) Anal lobe and genital sac.