Armsia petasus

Armsia petasus is a species of small, air-breathing, land snail, a terrestrial pulmonate gastropod mollusk in the family Amastridae. They are critically endangered by habitat loss. This species is endemic to the United States.

Armsia petasus
Conservation status
Critically Endangered  (IUCN 2.3)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura clade Panpulmonata clade Eupulmonata clade Stylommatophora informal group Orthurethra
Superfamily:	Cochlicopoidea
Family:	Amastridae
Genus:	Armsia
Species:	A. petasus
Binomial name
Armsia petasus