Zonitoides patuloides

Zonitoides patuloides
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Superfamily:	Gastrodontoidea
Family:	Gastrodontidae
Genus:	Zonitoides
Species:	Z. patuloides
Binomial name
	Zonitoides patuloides; (Pilsbry, 1895)
Synonyms
	Gastrodonta (Pseudohyalina) patuloides Pilsbry, 1895 (original combination); Gastrodonta patuloides Pilsbry, 1895 superseded combination;

Zonitoides patuloides is a species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Gastrodontidae. ^[1]

Description

The altitude of the shell attains 2.5 mm (0.10 in), its diameter 5.1 mm (0.20 in).

(Original description) The shell has about the size and form of Pyramidula striatella (J. G. Anthony, 1840) (synonym of Discus whitneyi (Newcomb, 1864) ). It is light green and hardly transparent. The shell is irregularly but closely rib-striate above, below and in the umbilicus. The first 1½ whorls are smooth. The 4½ whorls are slowly increasing, convex, with impressed sutures. The last whorl is rather tubular, rounded at periphery and below. The aperture has about the size of the umbilicus. It is round-lunate, flattened above. The lip is simple. The upper margin is flattened down and arched forward, as in Selenites or Gastrodonta elliotti and retracted at insertion. The umbilicus is large, showing all the whorls very plainly.

It is much smaller than Gastrodonta elliotti Redf., with far larger, open umbilicus and heavier sculpture, recalling a Pyramidula.^[2]

Distribution

This species is found on the Thunderhead Mountain along the border between Tennessee and North Carolina, USA on mountainsides and ravines on moist leaves.

References

^ MolluscaBase eds. (2023). MolluscaBase. Zonitoides patuloides (Pilsbry, 1895). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1352292 on 2023-12-09
^ Pilsbry, H. A. (1895). New forms of American Zonitidae and Helicidae. The Nautilus. 9(2): 14-16

InvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project.

External links

[WoRMS-1] MolluscaBase eds. (2023). MolluscaBase. Zonitoides patuloides (Pilsbry, 1895). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1352292 on 2023-12-09

[2] Pilsbry, H. A. (1895). New forms of American Zonitidae and Helicidae. The Nautilus. 9(2): 14-16

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[2]