Crassitoniella erratica

Crassitoniella erratica
Shell of Crassitoniella erratica
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Cingulopsoidea
Family:	Eatoniellidae
Genus:	Crassitoniella
Species:	C. erratica
Binomial name
Crassitoniella erratica Ponder, 1965
Synonyms
Amphithalamus aurantiocinctusMay, 1915 junior subjective synonym Amphithalamus erraticaMay, 1913 (original combination) Amphithalimus erraticaMay, 1913 (basionym, misspelled genus)

Crassitoniella erratica is a species of sea snail in the genus Crassitoniella . ^{[1] [2] [3] [4] [5] [6]}

Subspecies

• Crassitoniella erratica erratica(May, 1913)
• † Crassitoniella erratica subbicolor(Ludbrook, 1956)

Description

The length of the shell attains 2.5 mm, its diameter 1.4 mm.

(Original description as Amphithalamus aurantiocinctus) The shell is small, narrowly pyramidal, and white, adorned with two orange bands. It features five rounded whorls and a well-impressed, faintly axially costate suture; the first three whorls and the base are smooth. A narrow orange band is present at the periphery, which just shows above the suture on the spire; a second band is located on the middle of the base. The aperture is roughly quadrangular. The columella is straight and upright; behind it, an umbilical chink is present. The outer lip is sharp; the front lip bends back towards the axis of the shell. ^[7]

Distribution

This species is endemic to Australia and occurs off Tasmania.

References

1. "Crassitoniella erratica". seashellsofnsw.org.au. Retrieved 2023-08-02.
2. "WoRMS - World Register of Marine Species - Crassitoniella erratica (May, 1913)". www.marinespecies.org. Retrieved 2023-08-02.
3. "Crassitoniella erratica". iNaturalist. Retrieved 2023-08-02.
4. "No items found - MedGen - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2023-08-02.
5. "Crassitoniella erratica erratica (May, 1913)". Museums Victoria Collections. Retrieved 2023-08-02.
6. "Family Eatoniellidae | Molluscs of Tasmania" . Retrieved 2023-08-02.
7. May, W. L. (1915). Additions to the Tasmanian marine Mollusca, with descriptions of new species. Papers and Proceedings of the Royal Society of Tasmania. (1915): 75-99 This article incorporates text from this source, which is in the public domain .

• May, W. L. 1913. Further additions to the Tasmanian Mollusca. Papers and proceedings of the Royal Society of Tasmania 1912: 41-48, pl. 2.
• May, W.L. 1915 [1916]. Additions to the Tasmanian Mollusca, with descriptions of new species. Papers and Proceedings of the Royal Society of Tasmania 1915: 75-99
• Ponder, W.F. & Yoo, E.K. 1978. A Revision of the Eatoniellidae of Australia (Mollusca, Gastropoda, Littorinacea). Records of the Australian Museum 31: 606-658