Metridiidae

{{Short description|Family of sea anemones}} {{automatic taxobox | image = Metridium senile.jpg | image_caption = ''Metridium senile'' | taxon = Metridiidae | authority = Carlgren, 1893<ref name=KU>[http://www.nhm.ku.edu/inverts/carlgren_1949/metridiidae.html Metridiidae] {{webarchive|url=https://web.archive.org/web/20120331185106/http://www.nhm.ku.edu/inverts/carlgren_1949/metridiidae.html |date=2012-03-31 }} KU Natural History Museum. Retrieved 2011-08-05.</ref> }}

'''Metridiidae''' is a family of sea anemones in the order Actiniaria.<ref name=WoRMS>[http://www.marinespecies.org/aphia.php?p=taxdetails&id=100678 Metridiidae] World Register of Marine Species. Retrieved 2011-08-05.</ref>

==Characteristics== Members of the family Metridiidae are characterised by having a mesogloeal sphincter muscle and by the mesenterial arrangement, with the mesenteries not being divided into macronemes and microcnemes. The acontia typically have microbasic b-mastigophors and microbasic amastigophors, though the latter are not always present in adults.<ref name=KU/>

==Genera== The following genera are recognised by the World Register of Marine Species (WoRMS):<ref>{{Cite web|url=http://www.marinespecies.org/aphia.php?p=taxdetails&id=100678|title=WoRMS - World Register of Marine Species - Metridiidae Carlgren, 1893|website=www.marinespecies.org|language=en|access-date=2018-05-14}}</ref>

*''Metridium'' <small>Blainville, 1824</small> *''Paraisometridium <small>Zamponi, 1978</small>''

Of these, ''Metridium'' is the most speciose while ''Paraisometridium'' is monotypic.

==References== {{Reflist}}

Category:Metridiidae Category:Metridioidea Category:Cnidaria families