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. 26r): GS1161, Q8/f9687, Pakaurangi Point, Kaipara Harbour, probably Altonian (hypotype of Marwick 1965, pl. 11, fig. 25) (GNS) |
Beu & Maxwell (1990): Chapter 11; p. 238; pl. 26 r.
Synonymy: Crenilabium zelandicum Marshall 1918, p. 270
Classification: Acteonidae
Description: Rather small for family (height 10-12 mm), narrowly ovate, spire 0.35 total height. Protoconch heterostrophic, small, strongly tilted. Teleoconch of 5 whorls, spire whorls gently convex, last whorl elongate, enveloping much of rest of shell, anterior end rounded; sutures impressed. Axial sculpture of very fine costellae in spiral interspaces, clearly visible only near anterior end. Spiral sculpture of fine, low, flattened cords, interspaces very narrow except near anterior end of last whorl where they become as wide as the cords. Aperture lachrymiform, constricted posteriorly; columella strongly concave, narrowly callused, bearing about 17 fine, short, transverse ridges. Outer lip thin, gently convex, opisthocline, edge finely crenulate.
Comparison: The only other species of Crenilabium recorded from New Zealand is C. starboroughense (= C. obsoletum Marwick, 1965) (Opoitian-Mangapanian ?) (see Beu & Maxwell 1990, p. 426). The genus has mainly been recorded from the Late Cretaceous to Recent faunas of Europe.
Distribution: Altonian, Pakaurangi Formation, Pakaurangi Point, Kaipara Harbour (type) (uncommon).
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)