Abstract
Seven species of freshwater Bryozoa (Ectoprocta) were collected from the lower Ottawa River near Montréal, Quebec: Lophopodella carteri (Hyatt), Plumatella repens (Linnaeus), Hyalinella punctata (Hancock), Paludicella articulata (Ehrenberg), Fredericella indica Annandale, Pectinatella magnifica (Leidy), and Cristatella mucedo Cuvier. Lophopodella carteri is reported from Canada for the first time, and this record represents a 300-km northward extension of its known range. Plumatella repens, H. punctata, F. indica, and P. articulata are new records for the province of Quebec. Bryozoan colonies were commonly associated with each other and with other macroinvertebrates, including freshwater sponges, molluscs, turbellarians, chironomid larvae, and caddisfly larvae. Larval caddisflies, Ceraclea (Trichoptera: Leptoceridae), and the microturbellarian Stenostomum (Turbellaria: Catenulida) were predators of living bryozoan colonies.
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