Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
| | Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990) |
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  (Pl. 15k): GS9805, F44/f9501, Coal Brook Station, Wendon Valley, Duntroonian (GNS) |
 (Pl. 15n): GS9805, F44/f9501, Coal Brook Station, Wendon Valley, Duntroonian (GNS) |
Beu & Maxwell (1990): Chapter 10; p. 162; pl. 15 k, n.
Classification: Conidae: Coninae
Description: Rather small for family (height c. 25 mm), spire very low. Protoconch not known, apical whorls projecting above rest of spire. Teleoconch apparently of about 6 whorls, upper surface rather irregular; last whorl with a thin, irregularly undulose peripheral keel, strongly concave below, apparently tapering to a long neck. Sculpture on upper surface of very weak spiral threads; base with more prominent, though very subdued cords.
Comparison: This distinctive cone is unlikely to be confused with any other New Zealand species. Conus trigonicus (Pl. 8o, t) also has a very depressed spire, but differs from the present species in having relatively prominent spiral sculpture, a straight-sided or slightly concave last whorl, and a regularly curved, non-projecting periphery. We are not aware of any other Conidae in which the periphery protrudes to the degree it does in this new species.
Distribution: Duntroonian, Chatton Formation, Wendon Valley; ?Waimumu Lime Quarry, Southland.
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)