New Edition 2015:

J. M. Elliott & M. Dobson: Freshwater Leeches of Britain and Ireland.


Classification and Checklist of the Leeches 
(Phylum Annelida: Class Clitellata: Subclass Hirudinida) 
occurring in North America north of Mexico 2020

Leeches are segmented invertebrates (Annelida) related to earthworms. They have been found worldwide in freshwater, marine and terrestrial habitats.

On this website you find information about this fascinating group of ecto-parasites (or predators), with special reference to medicinal leeches of the genus Hirudo.

Jean Lamarck (1744 - 1829)