Helicarion mastersi

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Helicarion mastersi
Snail Pigeon House Mountain.jpg
Helicarion mastersi, about 1 inch (2.5 cm) long, crawling on a wet track at Pigeon House Mountain, Australia
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia

clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
clade Sigmurethra

clade limacoid clade
Superfamily:
Helicarionoidea
Family:
Helicarionidae
Subfamily:
Helicarioninae
Genus:
Helicarion
Species:
H. mastersi
Binomial name
Helicarion mastersi
(J. C. Cox, 1868) [1]
Synonyms

Vitrina mastersi J. C. Cox, 1868

Helicarion mastersi is a species of air-breathing land snail, also referred to as a semi-slug because of its small shell. It is a terrestrial pulmonate gastropod mollusc in the family Helicarionidae.

The specific name mastersi is in honor of the Australian malacologist George Masters (1837–1912), [2] who collected the type specimen. [1]

Subspecies

Subspecies include:

Distribution map of Helicarion mastersi Helicarion mastersi map.png
Distribution map of Helicarion mastersi

Distribution

This species is found in New South Wales, Australia. [4]

The type locality is Kiama, New South Wales, Australia. [1]

Description

Helicarion mastersi was originally described (under the name Vitrina mastersi) by James Charles Cox in 1868. Cox's original text (the type description) reads as follows: [1]

Shell depressed, very thin, smooth, transparent, extremely shining, very finely curvately striated, with a few faint spiral lines, bright golden yellow with occasionally a greenish tinge; spire very slightly prominent, apex central, suture impressed, narrowly margined; whorls 3, slightly convex, last rather depressed, rounded at the periphery, and rather convex beneath on outer half; aperture (mollusc) diagonal, lunately ovate; peristome simple, right margin slightly dilated above and in front, left rather straightly continuous with the columella, which is strongly arcuate above, the left margin and base membranous and flattened.

Diameter, greatest 0.55; least 0.38; height 0.17; aperture 0.35 long; 0.27 broad, of an inch.

Habitat. Kiama, N. S. W. − Masters .

A delicate bright golden-yellow hyaline shell, allied to V. Strangei , but easily distinguished by being much more depressed, and having half of the base membranous. The animal of this shell is whitish, and not grey as in V. Strangei.

Drawing of apical view Helicarion mastersi shell.png
Drawing of apical view
Drawing of umbilical view Helicarion mastersi shell 2.png
Drawing of umbilical view

Ecology

This semislug lives in closed Eucalyptus forests. It is primarily an arboreal species, but it can also be found in leaf litter. [4]

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References

This article incorporates public domain text from the reference [1]

  1. 1 2 3 4 5 Cox, J. C. (1868). A Monograph of Australian Land Shells. Sydney: William Maddock. p.  86, plate XIV, figure 12, 12a. Retrieved 2014-10-03.
  2. ↑ Coan E. V., Kabat A. R. & Petit R. E. (15 February 2011). 2,400 years of malacology, 8th ed. Archived 2012-11-11 at the Wayback Machine , 936 pp. + 42 pp. [Annex of Collations]. American Malacological Society
  3. ↑ Iredale, T. (1941). Guide to the land shells of New South Wales Pt III. Vol. 11. pp. 1–8.{{cite book}}: |work= ignored (help)
  4. 1 2 3 "Species: Helicarion mastersi (Cox, 1868)". Australian Faunal Directory. 5 February 2014. Retrieved 2014-10-03.
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