Liratoniella

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Liratoniella bicarinata
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Superfamily: Cingulopsoidea
Family: Eatoniellidae
Genus: Liratoniella
Ponder, 1965
Species:
L. bicarinata
Binomial name
Liratoniella bicarinata
Ponder, 1965

Liratoniella is a genus of small sea snails, marine gastropod mollusks in the family Eatoniellidae. [1] [2] [3] It is monotypic, being represented by the single species Liratoniella bicarinata. L. bicarinata is endemic to New Zealand, found off the coast of Three Kings Islands and on Middlesex Bank, living on Bryozoan substrates.

Contents

Description

In the original description, Ponder described L. bicarinata as below:

Shell of moderate size for the family, white, with a dark red inner chitinous layer showing through, solid yet semi-transparent, with two heavy spiral keels on each whorl. Protoconch sharply angled, a weak cord on edge of angle, rather flat on top, not distinctly marked off. Whorls 4, two strong spiral cords on each whorl, one cord just below suture, other just above, with suture in a narrow groove between them. A flat space between cords, raised higher than sutural groove, and smooth except for slightly oblique, fine growth lines. A strong spiral cord on base emerging at junction of outer lip with inner lip, Just behind outer lip there are only weak spirals. Aperture nearly circular, columella strongly excavated, thin; peristome continuous, sharp. Outer lip bent downwards in posterior corner and reflected slightly. Last half of body whorl with no chitinous layer and therefore pure white. [4]

The animal is unpigmented, with large eyes and a short bliobed snout. The holotype of the species has a height of 1.975 mm (0.0778 in), and a width of 1.26 mm (0.050 in). [4]

Taxonomy

The genus and species were first described by Winston Ponder in 1965 in the same paper. [4] The holotype of the species is held by the National Institute of Water and Atmospheric Research. [5]

Distribution and habitat

This marine species is endemic to New Zealand and occurs off Three Kings Islands and on Middlesex Bank, at a depth ranging between 37–805 m (121–2,641 ft). [6] The species is known to live on Bryozoan substrates. [7]

References

  1. ↑ Liratoniella Ponder, 1965 . Retrieved through: World Register of Marine Species  on 30 October 2025.
  2. ↑ "Liratoniella bicarinata Ponder, 1965". Ocean Biodiversity Information System. Retrieved 2 August 2023.
  3. ↑ Spencer, H. G.; Marshall, B. A.; Willan, R. C. (June 2009). "Checklist of New Zealand living Mollusca". New Zealand Inventory of Biodiversity. Volume 1. Kingdom Animalia Radiata, Lopotrochozoa, Deuteromstomia. 1: 196–219. Wikidata   Q125720861.
  4. 1 2 3 Ponder, W. F. (1965). "The Family Eatoniellidae in New Zealand". Records of the Auckland Institute and Museum . 6: 47–99. ISSN   0067-0464. JSTOR   42906115. Wikidata   Q58676802.
  5. ↑ Blom, Wilma M. (2025). "Annotated Catalogue of Fossil and Extant Molluscan Types in the Auckland War Memorial Museum". Bulletin of the Auckland Museum . 22. doi:10.32912/BULLETIN/22. ISSN   1176-3213. Wikidata   Q135397912.
  6. ↑ "Liratoniella bicarinata". New Zealand Mollusca. Retrieved 2 August 2023.
  7. ↑ Powell, A.W.B. (1979). New Zealand Mollusca: Marine, Land and Freshwater Shells. Auckland: Collins. p. 94. ISBN   0002169061.
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