All Oligochaetes bear bristles called "setae" on most segments. ... The Hirudinea resemble the oligochaetes in their major habitats (fresh water and land) as well as in lack of
parapodia
Parapodia are predominantly found in annelids, where they are paired, un-jointed lateral outgrowths that bear the chaetae. In several groups of sea snails and sea slugs, 'parapodium' refers to lateral fleshy protrusions.
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What are the characteristics of Hirudinea?
- Leeches: Class Hirudinea.
- Notable Body Characteristics.
- Sucker at rear end. Sucker at head end. Sucker at the rear. larger than the front. ...
- Distinguishing Leeches by Body. Shape.
- Family: Glossiphonidae. Body pear shaped. Generally smaller than other. ...
- Distinguishing Among. Glossiphonidae.
- Key Features.
- Eyes. (1-4 pairs) Body Patterns.
Do oligochaeta have setae?
With around 10,000 known species, the Oligochaeta make up about half of the phylum Annelida. These worms usually have few setae (chaetae) or "bristles" on their outer body surfaces, and lack parapodia, unlike polychaeta.
