411 REFERENCE · Wikibooks
Dichotomous Key/Annelida
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Annelida Animalia Animalia Annelida Annelida
1
Parapodia
Present - ../Polychaeta/
Not present - #2: Clitellata
2: Clitellata
Ventral sucker formed from last six segments
Yes - ../Hirudinea/
No - ../Oligochaeta/