''Petasina unidentata'' is a
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of air-breathing
land snail, a
terrestrial
Terrestrial refers to things related to land or the planet Earth.
Terrestrial may also refer to:
* Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...
pulmonate gastropod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
in the family
Hygromiidae
Hygromiidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. Helicellidae Ihering, 1909
Anatomy
Some snails in genera within this family create ...
, the hairy snails and their allies.
Shell description
File:Petasina unidentata shell 2.jpg, apical view
File:Petasina unidentata shell.jpg, apertural view
File:Petasina unidentata shell 3.jpg, basal view
References
Petasina
Gastropods described in 1805
{{Hygromiidae-stub