Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
| | Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990) |
|
  (Pl. 36j): GS11879, P29/f285, Starborough Creek, lower Awatere Valley, Marlborough, Waipipian (GNS) (a specimen with a slightly lower spire than Hawera shells). |
Beu & Maxwell (1990): Chapter 14; p. 289; pl. 36 j.
Synonymy: Calliostoma hawera Oliver 1926b, p. 114; Maurea hawera; Calliostoma (sensu lato) hawera, Beu & Maxwell 1990, p. 289, pl. 36j
Classification: Calliostomatidae
Description: Large for genus (40-55 mm in diameter), conical, with tall, straight-sided to slightly concave spire outline, sharply keeled periphery (narrowly rounded on last half-whorl of some large shells), and almost flat base. Sculpture of 3 narrow, well raised, beaded spiral cords on early spire whorls, increasing to 5 on later whorls, with an intermediate, finer, weakly beaded cord in each interspace, and some very fine, tertiary spiral lirae; base with about 20 prominent, narrow spiral cords, the inner ones beaded, the outer ones smooth. Aperture rhomboidal; inner lip inclined slightly to right. Protoconch not seen, presumably as described under C. waiparaense.
Comparison: Calliostoma hawera is distinctive because of its large size, its tall spire, its very flat sides and base, and its narrowly keeled peribasal angle. It was possibly ancestral to the Castlecliffian-Recent C. selectum, which has a much lower spire, a more convex base, and a more rounded peripheral angle.
Distribution: Waipipian; Waihi Beach, Hawera, South Taranaki (type); also sporadically in shallow-water shellbeds of Waipipian age in Wanganui, Hawke's Bay, and Marlborough (Starborough Formation in Starborough Creek, Seddon, and at the mouth of Blind River).
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)