Vertigo arthuri

Vertigo arthuri is a species of land snail in the family Vertiginidae, the whorl snails. It is known by the common names callused Vertigo,^[3] or Midwest Pleistocene Vertigo.^[4]

Vertigo arthuri
Drawing of a shell of Vertigo arthuri
Conservation status
Near Threatened  (IUCN 3.1)[1]
Secure  (NatureServe)[2]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Vertiginidae
Subfamily:	Vertigininae
Genus:	Vertigo
Species:	V. arthuri
Binomial name
Vertigo arthuri von Martens, 1882
Synonyms
Vertigo (Vertigo) arthuri E. von Martens, 1882 · alternate representation Vertigo bollesiana var. arthuri E. von Martens, 1882 (basionym) Vertigo briarensis A. B. Leonard, 1972 Vertigo coloradensis var. basidens Pilsbry & Vanatta, 1900 Vertigo gouldii hubrichti Pilsbry, 1934 Vertigo gouldii paradoxa Sterki, 1900 Vertigo occulta A. B. Leonard, 1972 junior subjective synonym

It is native to North America.^[2]

• Michigan^[5]
• Wisconsin^[4]

A 2009 phylogenetic analysis of genus Vertigo revealed that many of its species should be included in the circumscription of V. arthuri.^[6] This greatly expanded the range of V. arthuri, which is now considered to have a disjunct distribution spanning from Alaska to Newfoundland to New Mexico.^[2] V. arthuri now includes many snails that were formerly considered to be rare local endemics of the American Midwest.^[6] It now has one of the largest ranges of any land snail in the Western Hemisphere.^[2]

In many areas, this snail lives in various types of forest habitat. It consumes leaf litter and organic layers on rock surfaces.^[2]

Description

(Described as Vertigo gouldii hubrichti) The shell is subcylindric, larger than Vertigo nylanderi Sterki, 1909 with a similar long and deep impression over the palatal folds. The lower-palatal is deeply immersed. There is no angular lamella. The basal fold is well developed. The intermediate whorls are strongly, sharply striate