Pseudotorellia fragilis
Encyclopedia
Pseudotorellia fragilis is a species
of small sea snail
with a transparent, more or less internal shell
, a marine
gastropod mollusk in the family
Velutinidae
. Because the shell is mostly internal, the snail resembles a sea slug in general appearance.
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of small sea snail
Sea snail
Sea snail is a common name for those snails that normally live in saltwater, marine gastropod molluscs....
with a transparent, more or less internal shell
Gastropod shell
The gastropod shell is a shell which is part of the body of a gastropod or snail, one kind of mollusc. The gastropod shell is an external skeleton or exoskeleton, which serves not only for muscle attachment, but also for protection from predators and from mechanical damage...
, a marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
gastropod mollusk in the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
Velutinidae
Velutinidae
Velutinidae is a family of small sea snails, marine gastropod molluscs in the clade Littorinimorpha.- Taxonomy :The following two subfamilies have been recognized in the taxonomy of Bouchet & Rocroi :* subfamily Velutininae J. E...
. Because the shell is mostly internal, the snail resembles a sea slug in general appearance.