Parachaetocladius abnobaeus (Wülker)

Namayandeh, Armin, Bilyj, Bohdan, Beresford, David V., Somers, Keith M. & Dillon, Peter J., 2012, 3324, Zootaxa 3324, pp. 1-65 : 32

Parachaetocladius abnobaeus (Wülker)

Figs 26A–D

Diagnosis. SI seta pectinate; premandible simple without brush; antenna ( Fig. 26A) with long blade exceeding the length of flagellum, 4 th segment longer than the 3 rd, 6 th hair-like segment may be present, AR 1.0; mandible ( Fig. 26B) with two inner teeth; mentum ( Fig. 26C) with broad median tooth that's notched apically, 4 lateral teeth, outer most tooth larger than the proceeding one and occasionally bifid; VM plates poorly defined; posterior end of abdomen as in Fig. 26D; abdominal segment 9 extending over the base of anal tubules and posterior parapods; procercus strongly reduced with one very long apical seta, 0.3x the length of body; anal tubules elongate tapering distally, with three constrictions and slightly shorter than posterior parapod.

Notes. The identification is based on information provided by Epler (2001). Saether & Sublette (1983) provide illustrations ( Figs 24A, D, F) of a very similar unassociated larva, under the name Parachaetocladius sp. A , but no corresponding description or its origin is given in the paper.

Ecology and habitat. Larvae has been reported to occur in spring fed streams and springs ( Ferrington et al. 1995). In study streams larvae occurred in riffles areas. A very rare species in our study, it was found only in one stream (D1).

Sampling sites. Algonquin Provincial Park.

Nearctic distribution. Canada: Manitoba, Ontario, Nova Scotia. USA: Kansas, North and South Carolina, Georgia and Tennessee.