Piseinotecidae [SEP] parent taxon
Piseinotecidae
Piseinotecidae is a taxonomic family of sea slugs, specifically aeolid nudibranchs, marine gastropod molluscs in the superfamily Aeolidioidea. Recent studies suggest that the family might need to be merged with Flabellinidae.
Genera.
Genera within the family Piseinotecidae include:
- "Piseinotecus" Er. Marcus, 1955
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