Ringicella ringens

Ringicella ringens is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Odontostomidae.

Ringicella ringens
A colored drawing of an adult shell of Ringicella ringens
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
Superfamily:
Orthalicoidea
Family:
Odontostomidae
Genus:
Ringicella
Species:
R. ringens
Binomial name
Ringicella ringens
(Linnaeus, 1758)
Synonyms

Anostoma ringens (Linnaeus, 1758)
Anostoma globulosa Lamarck, 1822[1]
Anostoma globulosum Lamarck, 1822[2]

Distribution

This species occurs in Brazil. It lives on the ground.[3]

A drawing of a preserved specimen of Ringicella ringens showing how the snail carries the shell with the spire pointing downwards.

Shell description

Thomas Wyatt (1838)[4] wrote about the shell of this species (as Anostoma globulosa): "Globose, with two small punctures, one on each side of the lip; slightly carinated, smooth, and white; margin reflected."

The shell of this species is biconvex and solid. It is brownish-yellow in color, with a dark-brown band above the periphery, and another bordering the suture. The base of the shell is rather sparsely marked with irregular reddish-brown spots and usually has a dark stripe below the basal suture. The surface of the shell is only very slightly shiny. The last whorl is densely corrugated in a zigzag pattern, but sometimes this sculpture is almost obsolete. The shell has 4 whorls. The final whorl is carinated at the periphery, and has three deep, dark-colored grooves, as well as one small one behind the lip.[5]

The aperture of the shell is subhorizontal. It is elevated above the periphery of the shell and is obstructed by six white teeth. There are two strong lamellae on the parietal wall; these lamellae are compressed and curve upward within the aperture. The infraparietal lamella is stouter and straight. The outer lip of the peristome is broad, expanded and reflexed. It is white in color, its upper end perforated by an oval hole.

The outer margin of the peristome has four long folds within it, of which the columellar and the lower and upper palatal are subequal, the inner end of the latter being strongly bent upward. The suprapalatal fold is smaller and oblique, almost transverse. Above it is a small upper superpalatal fold, which has united with the angle-lamella to form the wall of the respiratory foramen, perforating the end of the lip.[5]

The width of adult shells is 18–25 mm, the height is 10.5–13 mm.[5]

References

This article incorporates public domain text from references[4][5]

  1. Lamarck, J.B.P.A. 1819-1822. Mollusques In Histoire Naturelle des Animaux sans vertebres. Paris. 6 (1): 1-343 (1819), (2): 1-232 (1822). page 101.
  2. 1866. Catalogue of the genera Helix, Anostoma, Hypselostoma, Streptaxis, Tomigerus, Bulimus, Orthalicus, Partula, in the collection of A.D. Brown, Princeton, New Jersey
  3. http://www.conchasbrasil.org.br/english/conchology/descricao.asp?id=1540 accessed 19 February 2009
  4. Thomas Wyatt. 1838. A Manual of Conchology: According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville Exemplified and Arranged for the Use of Students. Harper & brothers, page 109.
  5. Pilsbry H. A. 1901. in Tryon G. W. & Pilsbry H. A. 1901-1902 - Oriental Bulimoid Helicidae. Odontostominae. Cerionidae Volume 14. Manual of Conchology. Second series: Pulmonata. page 114-115.

Further reading
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