Hirudo
Hirudo is a genus of leeches of the family Hirudinidae. It was described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae.
The two well-accepted species within the genus are:
Hirudo medicinalis Linnaeus, 1758
Hirudo nipponia Whitman, 1886
Three other species, previously synonymized with H. medicinalis, were described in 2005 and are gaining acceptance:
Hirudo verbana
Hirudo orientalis
Hirudo sulukii
Hirudo troctina
Hirudo tianjinensis
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