FIGURE 4 in 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

FIGURE 4. Distribution of the four widespread leech species. Circles, 2004 survey; squares, literature locations (Pawlowski 1948, Davies 1973); triangles, museum specimens. A, Glossiphonia elegans (Verrill); B, Helobdella modesta (Verrill); C, Erpobdella punctata (Leidy); D, Erpobdella obscura (Verrill).