Metarminoidea [SEP] parent taxon
Metarminoidea
Metarminoidea is a provisional taxonomic superfamily of colourful sea slugs, aeolid nudibranchs, marine opisthobranch gastropod molluscs in the clade Nudibranchia.
This name is unfortunately not available as a superfamily name, because it is not based on a genus. It is used here because, as of February 2015, no replacement name has yet been proposed.
Description.
The nudibranchs in this superfamily share with the Aeolidida the possession of dorsal cerata. Unlike the cerata of aeolids they have either no digestive gland or short digestive gland intrusions
Taxon in disguise
In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of similar or lower rank, making the parent unit paraphyletic. This happens when rapid evolution makes a new species appear radically different from the ancestral group, so that it is not (initially) recognised as belonging to the parent phylogenetic group, leaving the latter an evolutionary grade.
While the term is from bacteriology, parallel examples are found throughout the tree of