Umbraculoidea is a
superfamily of unusual false limpets with a thin soft patelliform shell, marine gastropod molluscs in the
clade Umbraculida, within the clade
Euopisthobranchia
Euopisthobranchia is a taxonomic clade of snails and slugs in the clade Heterobranchia within the clade Euthyneura.
This clade was established as a new taxon by Jörger et al. in October 2010. Euopisthobranchia is a monophyletic portion of the ...
.
There are two families in this superfamily, which is listed as the only superfamily in the clade Umbraculida within the informal group
Opisthobranchia
Opisthobranchs () is now an informal name for a large and diverse group of specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping.
Euopisth ...
in the
taxonomy of Bouchet & Rocroi (2005).
Taxonomy
A study by Grande ''et al.'', published in 2004, concluded that Umbraculoidea was a
sister clade
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree.
Definition
The expression is most easily illustrated by a cladogram:
Taxon A and t ...
to the
Cephalaspidea
The order Cephalaspidea, also known as the headshield slugs and bubble snails, is a major taxon of sea slugs and bubble snails, marine gastropod mollusks within the larger clade Euopisthobranchia.Jörger K. M., Stöger I., Kano Y., Fukuda H. ...
(
Acteonoidea excluded).
2005 taxonomy
Umbraculoidea contains two families:
*Family
Umbraculidae
Umbraculidae are a Taxonomy (biology), taxonomic family (biology), family of unusual sea snails or limpets, marine (ocean), marine opisthobranch gastropod molluscs in the clade Umbraculida.
Distribution
This family has a global distribution in t ...
*Family
Tylodinidae
Tylodinidae is a family of sea snails or false limpets, marine opisthobranch gastropod mollusks in the superfamily Umbraculoidea.
Taxonomy 2005 taxonomy
The family Tylodinidae consists of the following subfamilies (according to the tax ...
2010 taxonomy
Jörger et al. (2010)
moved Umbraculoidea to the Euopisthobranchia.
Footnotes
External links
www.seaslugforum.net
{{Taxonbar, from=Q7881380
Euopisthobranchia