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. 57i): Odostomia obstinata Laws, 1939; GS12324, J41/fl98, Old Rifle Butts, Cape Wanbrow, Oamaru (Altonian) |
  (Pl. 57m): Odostomia obstinata Laws, 1939; GS12324, J41/fl98, Old Rifle Butts, Cape Wanbrow, Oamaru (Altonian) (oblique apertural view showing columellar plait). |
Beu & Maxwell (1990): Chapter 17; p. 388; pl. 57 i,m.
Classification: Pyramidellidae: Odostomiinae
Description: Height 1.7-6 mm, narrowly conic to elongate-ovate,-spire of variable height. Protoconch tilted, apex exposed in some species, hidden by teleoconch in others. Teleoconch whorls flat-sided to distinctly convex; typically no sculpture except for very fine growth lines and in some species very fine spiral striae, but some species with 1 or 2 distinct grooves near suture. Columella with a single prominent fold; outer lip almost straight, smooth within.
Comparison: Odostomia is a very "generalised" pyramidellid characterised by its relatively low spire, its absence of definite sculpture, its single strong columellar plait, and its smooth outer lip.
Distribution: Wangaloan-Recent, New Zealand; cosmopolitan, ranging from Late Cretaceous to Recent.
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)