GNS Science

Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)

New Zealand Cenozoic Mollusca

Aethocola (Neocola) gamma (Finlay, 1926)


(Pl. 25d): GS11185, D45/f8822, Slip Point, Clifden, Clifdenian (GNS)

Beu & Maxwell (1990): Chapter 11; p. 226; pl. 25 d.

Synonymy: Austrofusus (Neocola) gamma Finlay, 1926b, p. 235; Beu & Maxwell 1990, p. 226, pl. 25d

Classification: Buccinulidae

Description: Similar to A. (Neocola) beta — particularly to the more "advanced" forms (e.g. from Long Beach Shellbed, Clifden) — but differing 1) in having a narrower and much sharper peripheral keel and a more pronounced basal angulation; 2) in having vertically compressed, sharp tubercles, rather than rounded nodules, on the peripheral keel. The nodules on the basal angulation are no stronger than on A. beta, but are accentuated by the basal spiral cords, which are thickened and slightly tubercular where they cross them; and 3) in having the 3 basal spiral cords considerably more prominent, partly because the spiral threads between the peripheral keel and basal angulation are more subdued than in A. beta in most specimens.

Comparison: See Aethocola (Neocola) beta.

Distribution: Clifdenian-Lillburnian, Slip Point, Clifden, Clifdenian (type); Slip Point Siltstone and Lill Sand, Clifden; Oparara River, Karamea district.

Cite this publication as: "A.G. Beu and J.I. Raine (2009). Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990). GNS Science miscellaneous series no. 27."
© GNS Science, 2009
ISBN 978-0-478-19705-1
ISSN 1177-2441
(Included with a PDF facsimile file copy of New Zealand Geological Survey Paleontological Bulletin 58 in CD version from: Publications Officer, GNS Science, P.O. Box 30368 Lower Hutt, New Zealand)


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