Difference between revisions of "Category:Pseudophyllidea"
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| − | <categorytree mode=pages style="float:right; clear:right; margin-left:1ex; border:1px solid gray; padding:0.7ex; background-color:white;"> | + | <categorytree mode=pages style="float:right; clear:right; margin-left:1ex; border:1px solid gray; padding:0.7ex; background-color:white;">Cestodes</categorytree> |
*Pseudophyllidean tapeworms have a scolex with four longitudinal grooves. | *Pseudophyllidean tapeworms have a scolex with four longitudinal grooves. | ||
Revision as of 09:25, 21 May 2010
- Pseudophyllidean tapeworms have a scolex with four longitudinal grooves.
- They have a genital pore which is centrally placed on each segment.
- The eggs and life-cycle have some similarity to that of the trematodes.
- The Pseudophyllidean egg shell is thick, brown and operculate.
- The Pseudophyllidean life-cycle uses two intermediate hosts – the coracidium, which emerges after hatching, must first be ingested by a crustacean. A larval procercoid develops within the body cavity of the crustacean. If the crustacean is then eaten by a freshwater fish, the procercoid is liberated and develops into a second larval stage, a plerocercoid, within the muscles of this new host. The plerocercoid possesses the characteristic scolex – it is only this stage that is infective to the final host.
- There are no pseudophyllideans of importance in the UK, but some are of significance in tropical or sub-tropical areas (for example Spirometra), and in sub-arctic regions (for example Diphyllobothrium).
<ncl style=bullet maxdepth=5 headings=bullet headstart=2 showcats=1 showarts=1>Category:Pseudophyllidea</ncl>
Pages in category "Pseudophyllidea"
The following 2 pages are in this category, out of 2 total.