Notaspidea

Notaspidea
A live individual of Pleurobranchaea meckelii; the gill (or ctenidium) is visible in this view of the right-hand side of the animal
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Orthogastropoda (older classification)
Heterobranchia (new classification)
Order:
Opisthobranchia (older classification)
Suborder:
Notaspidea

Notaspidea, also known as the sidegill slugs, is an artificial grouping of sea slugs which is now split into two unrelated groups, the Umbraculida and the Pleurobranchomorpha.[1]

  1. ^ Gofas, S. (2014). Notaspidea. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=1754 on 2015-02-12