Catenulida
| Catenulida | |
|---|---|
| 200px | |
| Catenula lemnae | |
Scientific classification  |
|
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Class: | Turbellaria |
| Order: | Catenulida Meixner, 1924 |
Lua error in Module:Taxonbar/candidate at line 22: attempt to index field 'wikibase' (a nil value).
The Catenulida are an order of turbellarian flatworms.
They are relatively small free-living flatworms, inhabiting freshwater and marine environments. The pharynx and intestine are simple in structure, with the latter forming a ciliated sac. They possess two pairs of nerve cords and often a statocyst. The gonads are unpaired. Unusually, the male gonopore opens on the dorsal surface of the animal, above the pharynx, while the female reproductive system lacks any of the usual ducts and related structures found in other turbellarians. Asexual reproduction by paratomy is common, leading to chains of zooids (Latin fem. n. catenula - small chain). Members of the symbiotic genus Paracatenula lack a digestive tract, and instead use intracellular chemoautotrophic bacterial symbionts for their nutrition.[1][2]
References
- Lua error in package.lua at line 80: module 'strict' not found.
- Lua error in package.lua at line 80: module 'strict' not found.
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This flatworm- (or platyhelminth-) related article is a stub. You can help Wikipedia by expanding it. |
