Amalda depressa

Amalda depressa
	Apertural view of a shell of Amalda depressa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Family:	Ancillariidae
Genus:	Amalda
Species:	A. depressa
Binomial name
	Amalda depressa; (G.B. Sowerby II, 1859)
Synonyms
	Amalda (Baryspira) depressa (Sowerby, G.B. II, 1859); Ancillaria depressa G.B. Sowerby II, 1859 (original combination); † Ancillaria lata F. W. Hutton, 1885 (junior subjective synonym); Baryspira (Pinguispira) depressa (G. B. Sowerby II, 1859) unaccepted (superseded combination); Baryspira depressa (G.B. Sowerby II, 1859);

Amalda depressa, common name the depressed ancilla, is a species of a small sea snail, a marine gastropod mollusc in the family Ancillariidae.^[1]

Description

The length of the shell varies between 11 mm and 26 mm.

(Original description) The spire is shorter than in Amalda australis, and the thickened callus of the columella and spire gives greater width to the top. ^[2]

Distribution

This marine species is endemic to and occurs off New Zealand.

References

^ Rosenberg, G. (2012). Amalda depressa (Sowerby II, 1859). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=409970 on 2012-11-14
^ Sowerby, G.B. II (1859). Monograph of the genus Ancillaria. In: G. B. Sowerby II (ed.), Thesaurus Conchyliorum, or monographs of Genera of Shells, vol. 3 (19). privately published. pp. 57–67. This article incorporates text from this source, which is in the public domain.

Hutton, F.W. (1885). "Descriptions of new Tertiary shells - Part 2". Transactions of the New Zealand Institute. 17: 325.
Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
Michaux, B. (1991). "The Evolution of the Ancillinae with Special Reference to New Zealand Tertiary and Recent Species of Amalda H. & A. Adams, 1853 (Gastropoda:Olividae:Ancillinae)". Venus. 50 (2): 130–149.
Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Christchurch: Canterbury University Press.{{cite book}}: CS1 maint: multiple names: authors list (link)

External links

"Amalda (Baryspira) depressa". Gastropods.com. Retrieved 15 January 2019.

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[WoRMS-1] Rosenberg, G. (2012). Amalda depressa (Sowerby II, 1859). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=409970 on 2012-11-14

[2] Sowerby, G.B. II (1859). Monograph of the genus Ancillaria. In: G. B. Sowerby II (ed.), Thesaurus Conchyliorum, or monographs of Genera of Shells, vol. 3 (19). privately published. pp. 57–67. This article incorporates text from this source, which is in the public domain.

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