411 REFERENCE · Wikibooks
Dichotomous Key/Hirudinea
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
1
Reversible proboscis
Present - #3: Rhynchobdellae
Not present - #2:Arhynchobdellae
2
Teeth
Present - Gnathobdellae
Not present - Pharyngobdellae
3: Rhynchobdellae
Body shape
Flat - Glossiphoniidae
Cylindrical - Pisciolidae