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Taxon profile

genus

Austrotoma Finlay, 1924

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Cochlespiridae

Shell of moderate to large size, 25 - 85 mm., of buccinoid shape, with a moderately tall spire but a capacious body-whorl, slowly tapered to a very short, deeply notched anterior canal, with a ridge-margined fasciole. Protoconch of 4-5 whorls, with a minute globular tip, the first three whorls smooth and the remainder bearing strong flat-topped spiral cords, a few thin axials towards the close. Sinus broad and shallow, occupying most of the shoulder slope. There is usually a well marked to heavy subsutural margining fold, followed by a moderate shoulder sulcus. Adult sculpture varying from almost smooth, predominantly spiral, to axials overridden by spirals, and sometimes granulose to nodulose at the points of intersection. The genus resembles Belophos but differs in details of the protoconch, the presence of a subsutural fold, a more deeply notched anterior and a ridge margined fasciole. There is also probable alliance with the North Pacific. Megasurcula, which has a Miocene to Recent range in California and occurs also in the Miocene of Ecuador, Japan and Korea. Range: Probably Paleocene and certainly lower Oligocene to lower Pliocene of New Zealand and Oligocene of Tasmania and Victoria. New Zealand

Sources

Description source: Powell, A.W.B. : The Molluscan Families Speightiidae and Turridae. 1966.
Author: Jan Delsing

Included taxa

Number of records: 23

species Austrotoma ampla Powell, 1942
species Austrotoma clifdenica Powell, 1942
species Austrotoma cryptoconoidea Powell, 1942
species Austrotoma deducta Marwick, 1931
species Austrotoma echinata Powell, 1942
species Austrotoma excavata (Suter, 1917)
species Austrotoma eximia (Suter, 1917)
species Austrotoma finlayi Powell, 1938
species Austrotoma gemmulata Powell, 1942
species Austrotoma gracilicostata (Zittel, 1865)
species Austrotoma hurupiensis Dell, 1952
species Austrotoma inaequabilis Marwick, 1929
species Austrotoma indiscreta Finlay & Marwick, 1937
species Austrotoma kaiparaensis Powell, 1942
species Austrotoma lawsi Powell, 1942
species Austrotoma minor (Finlay, 1924)
species Austrotoma molinei Marwick, 1931
species Austrotoma neozelanica (Suter, 1913)
species Austrotoma nervosa Powell, 1942
species Austrotoma obsoleta Finlay, 1926
species Austrotoma prolixa Laws, 1940
species Austrotoma suteri (Cossmann, 1916)
species Austrotoma toreuma Marwick, 1929

Links and literature

EN Fossilworks - Paleobiology Database [10815]

Fossilworks - Paleobiology Database [http://fossilworks.org/] [as Austrotoma Finlay, 1924]
Data retrieved on: 14 December 2015
EN The Interim Register of Marine and Nonmarine Genera [1282607]

Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [http://www.irmng.org] [as Austrotoma Finlay, 1924]
Data retrieved on: 30 November 2019

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Explanations

extinct taxon