Alvania interrupta

Alvania interrupta
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Rissooidea
Family:	Rissoidae
Genus:	Alvania
Species:	†A. interrupta
Binomial name
	†Alvania interrupta; (H. J. Finlay, 1924)
Synonyms
	† Alvania (Linemera) interrupta (H. J. Finlay, 1924) alternate representation; † Linemera interrupta Finlay, 1924; † Rissoa gradata F. W. Hutton, 1885 (invalid: not d'Orbigny, 1842);

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

Description

This species is characterized by its irregularly-placed spiral ribs, these being crowded anteriorly, but almost absent posteriorly, so that spire-whorls have only two distinct ribs close to suture below. There are, however, traces of faint flattish ribs with linear interstices between these and suture above, and a distinct groove crosses ribs just below suture. ^[2]

Distribution

Fossils of this marine species were found in Tertiary strata in New Zealand

References

^ MolluscaBase eds. (2024). MolluscaBase. Alvania interrupta (H. J. Finlay, 1924) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=832775 on 2024-02-14
^ Finlay H.J. (1924). New Zealand Tertiary rissoids. Transactions of the New Zealand Institute. 55: 480-494. This article incorporates text from this source, which is in the public domain.

External links

Hutton, F. W. (1885). Descriptions of new Tertiary shells. Part 1. Transactions of the New Zealand Institute 17: 313-324.

[WoRMS-1] MolluscaBase eds. (2024). MolluscaBase. Alvania interrupta (H. J. Finlay, 1924) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=832775 on 2024-02-14

[2] Finlay H.J. (1924). New Zealand Tertiary rissoids. Transactions of the New Zealand Institute. 55: 480-494. This article incorporates text from this source, which is in the public domain.

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