Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails that over evolutionary time have either completely lost their shells, or have seemingly lost their shells due to having a greatly reduced or internal shell. The name "sea slug" is most often applied to nudibranchs, as well as to a paraphyletic set of other marine gastropods without obvious shells.
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. Bubble shells is another common name for these families of marine gastropods, some of which have thin bubble-like shells. This clade contains more than 600 species.
Bulla is a genus of medium to large hermaphrodite sea snails, shelled marine opisthobranch gastropod molluscs. These herbivorous snails are in the suborder Cephalaspidea, headshield slugs, and the order Opisthobranchia.
Diaphanoidea is a taxonomic superfamily of small sea snails, marine opisthobranch gastropod mollusks or micromollusks in the Cephalaspidea, the headshield slugs and bubble snails.
Haminoeoidea is a taxonomic superfamily of small sea snails or bubble shells, marine opisthobranch gastropod mollusks in the clade Cephalaspidea, the headshield slugs and bubble snails.
Philinoidea is a taxonomic superfamily of sea slugs, specifically headshield slugs, marine gastropod mollusks in the order Cephalaspidea.
Philinidae is a family of medium-sized sea slugs, marine opisthobranch gastropod mollusks. These are headshield slugs, in the order Cephalaspidea.
Philine is a genus of sea slugs or sea snails, marine gastropod molluscs in the subfamily Philininae of the family Philinidae, the headshield slugs or paper bubbles.
Vetigastropoda is a major taxonomic group of sea snails, marine gastropod mollusks that form a very ancient lineage. Taxonomically the Vetigastropoda are sometimes treated as an order, although they are treated as an unranked clade in Bouchet and Rocroi, 2005.
Bulla quoyii, or the brown bubble snail, is a species of sea snail, a marine gastropod mollusc in the family Bullidae, the bubble snails.
Conus praecellens, common name the admirable cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
This overview lists proposed changes in the taxonomy of gastropods at the family level and above since 2005, when the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) was published. In other words, these are recent updates in the way various groups of snails and slugs are classified.
Hancock's organ is a lateral concealed sensory organ of gastropods, a chemo-sensory sense organ found in some sea snails. This organ is found in most of the shelled opisthobranchs.
Bulla gouldiana, the California bubble, Gould’s bubble or cloudy bubble snail, is a species of sea snail, a marine gastropod mollusc in the family Bullidae, the bubble snails. It is found in shallow water on sheltered coasts of the eastern Pacific Ocean.
Cylichnium is a genus of very small sea snails, unassigned in a family in the order Cephalaspidea.
Laonidae is a family of small marine snails belonging to the superfamily Philinoidea, though Laonidae and Philinoidea are genetically distinct. They are monophyletic, meaning they are developed from a single ancestor. Laonidae also has the synonymised name Laoninae, which is largely unaccepted in the modern day scientific community. The name Laoninae is introduced by Alice Pruvot-Fol who proposes it as the subfamily to the genea Loana, A.Adams 1865.
Laona is a genus of gastropods belonging to the family Laonidae.
Diaphana minuta is a species of gastropods belonging to the family Diaphanidae.
Phanerophthalmus is a genus of medium-sized sea snails or bubble snails, marine opisthobranch gastropod molluscs in the family Haminoeidae, the haminoea bubble snails, part of the clade Cephalaspidea, the headshield slugs and bubble snails.
Spiniphiline is a genus of marine gastropods belonging to subfamily Hermaniinae of the family Philinidae.
