Theromyzon

Madill, Jacqueline & Hovingh, Peter, 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, pp. 1-21 : 8-9

Theromyzon sp.

Common names: Waterfowl leech or duck leech

General distribution: Holarctic ( Figures 2 C, 3B, Table 1).

Newfoundland: Museum specimen: Site 6 (CMNA 2006–0003). The species is undetermined since the gonopore separation could not be deciphered. Maculate pigmentation, especially evident around the dorsal edge. Previously unreported for Newfoundland and Labrador. This taxon is unusually rare for a region with an abundance of waterfowl.

Figures

FIGURE 2. Photographs of selected Newfoundland and Labrador leeches. D was collected by Cecelia McGrath in 1982. A, Dorsal view of Glossiphonia elegans (Verrill), site 17; B, Dorsal view of Helobdella modesta (Verrill), site 12; C, Dorsal view of Theromyzon sp., site 6; D, Lateral view of Haemopis lateromaculata Mathers, showing the plain ventrum separated from the speckled dorsum by a lighter pattern on the side, CMNA 1982 – 0654; E, Dorsal view of Haemopis marmorata (Say), site 12; F, Closeup of anal protrusion of Haemopis marmorata, Site 12; G, Erpobdella punctata (Leidy) (normal pigmentation), site 7; H, Erpobdella obscura (Verrill) [normal pigmentation], site 21. Scale bars are in cm unless otherwise indicated.