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Alvania pariana
	Shell of Alvania pariana (holotype)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Rissooidea
Family:	Rissoidae
Genus:	Alvania
Species:	†A. pariana
Binomial name
	†Alvania pariana; (Guppy, 1896)
Synonyms
	† Rissoa (Alvania) pariana Guppy, 1896 (Alvania accepted as full genus)

Alvania pariana is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.^[1]

Description

The length of the shell attains 2.3 mm, its diameter 1.5 mm.

(Original description) The turreted shell is conic-oblong. It contains about 6 whorls. They are decorated by about 4 spiral ribs narrower than their interstices, upon which rise into points somewhat stout longitudinal costae, forming subquadrate or oblong pits, in which some faint striae may be observed. The apex is smooth. The base has about 4 spiral ribs. The outer lip is stout and expanded. ^[2]

Distribution

Fossils of this species were found in Tertiary strata in Trinidad.

References

^ ^a ^b MolluscaBase eds. (2024). MolluscaBase. Alvania pariana (Guppy, 1896) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=954755 on 2024-02-15
^ Guppy, R. J. L. & Dall, W. H. (1896). Descriptions of Tertiary fossils from the Antillean region. Proceedings of the United States National Museum. 19: 303–331, pls 27–30 This article incorporates text from this source, which is in the public domain.

External links

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[WoRMS-1] MolluscaBase eds. (2024). MolluscaBase. Alvania pariana (Guppy, 1896) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=954755 on 2024-02-15

[2] Guppy, R. J. L. & Dall, W. H. (1896). Descriptions of Tertiary fossils from the Antillean region. Proceedings of the United States National Museum. 19: 303–331, pls 27–30 This article incorporates text from this source, which is in the public domain.

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