Brillia parva Johannsen

Namayandeh, Armin, Bilyj, Bohdan, Beresford, David V., Somers, Keith M. & Dillon, Peter J., 2012, 3324, Zootaxa 3324, pp. 1-65 : 17

Brillia parva Johannsen

Figs 10A–F

Diagnosis. Head as in Fig. 10A; well developed paired pectinate labral lamellae; SI seta plumose; labral sclerite ( Fig. 10B) consisting of anterior quadrate plate (Sc2) and a divided posterior bar (Sc1); premandible weakly bifid without brush; antenna ( Fig. 10C) 4-segmented, 2 nd segment has unsclerotized annular ring near the base, AR 1.3; mandible ( Fig. 10D) with 4 inner teeth, the 3rd being larger than the 2 nd; mentum ( Fig. 10E) with projecting bifid median tooth and 5 lateral teeth, the second last one strongly reduced and set lower than outer most tooth; submental setae ( Fig. 10A, SSm) placed closer to posterior margin; posterior end of abdomen as in Fig. 10F; procercus well developed, L/ W 2.1, with 8 apical setae; anal tubules conical about 0.7 length of posterior parapods.

Notes. The larva keys and agrees with the species description given by Oliver and Roussel (1983b).

Ecology and habitat. Larvae are mainly shredders and commonly found in woodland streams. They pupate in silk cases ( Oliver & Roussel 1983b). In this study the larvae showed preference for leaf litter.

Sampling sites. We found the larvae inhabiting streams in all the provincial parks and districts located in our study area.

Nearctic distribution. Canada: New Brunswick, Newfoundland , Ontario, and Québec. USA: California, Maine, Massachusetts, New Hampshire, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Vermont .