GNS Science

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

New Zealand Cenozoic Mollusca

Antizafra pisanopsis (Hutton, 1885)


(Pl. 42s): GS10849, V20/f8572, Devil's Elbow mudstone, top of north face of Devil's Elbow hill, Napier-Wairoa highway, north of Napier, Hawke's Bay, Nukumaruan (GNS)

Beu & Maxwell (1990): Chapter 15; p. 324; pl. 42 s.

Synonymy: Columbella pisaniopsis Hutton 1885b, p. 314; C. pisanopsis, corrigenda to volume 17 of TNZI; Anachis pisaniopsis

Type species of Antizafra Finlay, 1926

Classification: Columbellidae

Description: Small for family (10-12 mm high), tall and narrow; spire moderately tall; last whorl long and narrow, tapering gradually to moderately long (for family), straight, widely open canal without fasciole. Whorls with narrow, rounded shoulder just below suture, weakly inflated below. Sculpture of prominent, smooth, moderately wide, widely spaced spiral cords, 5 or 6 on spire whorls and about 25 on last whorl; on spire whorls and earlier half of last whorl, cords cross low, wide, gently rounded axial folds without forming nodules; axial folds obsolete on last half-whorl. Aperture long and narrow; inside of thickened outer lip bears 10 to 12 low nodules; base of columella bears a single, wide, prominent plait. Protoconch tall dome-shaped, of 1.5 smooth polished whorls.

Comparison: The slightly taller, more coarsely cancellate species Antizafra cancellaria (Hutton) and the shorter, more weakly sculptured species A. speighti (Marwick) are sympatric with, but less common than, the widespread A. pisanopsis; all three species occur in shallow to moderately offshore mudstone facies in Hawke's Bay, and are restricted to the Nukumaruan (common in mudstone overlying the Te Aute Limestone of Pukeora Hill on Ashcott Road, near Waipukurau). Other species referred to Antizafra are shorter, more weakly sculptured and lack the columellar fold, and so are probably not congeneric; the genus appears to be restricted to Hawke's Bay Nukumaruan rocks, apart from a very few records from Nukumaruan and Castlecliffian rocks in Wanganui basin.

The list of Corrigenda bound between the title page and contents list of Volume 17 of "Transactions of the New Zealand Institute", 1885 (the volume Hutton's Columbella pisaniopsis appeared in) includes "page 314, line 22, for pisaniopsis read pisanopsis", so although this correction had not been adopted previously, it is presumably a correction of a typographical error, and was adopted by Beu & Maxwell (1990).

Distribution: Nukumaruan; "Petane", i.e., Tangoio limestone outcrops on hillside north of Petane Pa, north side of Esk River near mouth, central Hawke's Bay (type); widespread and moderately common in blue-grey mudstone facies in central and southern Hawke's Bay.

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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