Mature larvae of Hydroporus signatus Sharp collected from a small eutrophic habitat served as substrates for Peritrichida (Ciliophora). The rate of infestation was 60% and there were indications of body site specificity for the colonies with most found attached to the cranium and/or mouthparts.
Barman, E. H.; Jessica L. Rackett; and W. P. Wall
"Mature Larvae of Hydroporus signatus Sharp (Coleoptera: Dytiscidae) as Substrates for Peritrichida,"
Georgia Journal of Science, Vol. 65, No. 3, Article 1.
Available at: http://digitalcommons.gaacademy.org/gjs/vol65/iss3/1