Madill, J. and Hovingh, P. 2007.

Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia

. Zootaxa. 1657, 1 (Dec. 2007), 1–21. DOI:https://doi.org/10.11646/zootaxa.1657.1.1.