Henry Scherren, “Rotifers Commensal with caddis-worms”, Londres, Nature, MacMilan, vol. 56, issue 1445, p. 224, 1897.

It may be of interest record the fact that, like Gammarus pulex and Asellus aquaticus the larva of Phryganea grandis is a host for the commensal rotifer, Callidina parasitica. One one specimen taken near Potter Heigham Bridge, I found between fifty and sixty of these commensals. As is the case with the commensals of Gammarus and Asellus, those of the caddis-worm gradually disappear when the hosts are kept in an aquarium. Rotifer tardus was also found among the materials of the larval case.