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. 56h): Volvulella reflexa (Hutton, 1886); GS5354, J38/f6604, Tengawai River, near Albury, South Canterbury (Altonian) |
Beu & Maxwell (1990): Chapter 17; p. 391; pl. 56 h.
Synonymy: Rhizorus of authors, not of Montfort, 1810 (see Harry 1967, p. 133)
Classification: Retusidae
Description: Height 2.5-8 mm, ovate-fusiform, involute, spire produced into a short, open spine in most species, whorl sides gently to strongly convex; smooth or with sculpture of narrow spiral grooves. Aperture extending length of shell, constricted over most of its length, anterior end rounded; columella short, oblique, twisted but without a definite plait. A narrow pseudumbilicus present in some species.
Comparison: Volvulella is distinguished by its involute, ovate-fusiform shell, typically with the apex produced to form a short spine.
Distribution: Mangaorapan?; Waitakian-Recent, New Zealand; widespread; Eocene-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
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Zealand)