Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
(Pl. 56a): Brocchinia aff. finlayi (Marwick, 1931); GS12288, 045/f80, Fouraye Siltstone, left bank Waiau River, Clifden (Altonian) (apex showing prominent spiral keels on last whorl of protoconch).
(Pl. 56b): Brocchinia aff. finlayi (Marwick, 1931); GS12288, 045/f80, Fouraye Siltstone, left bank Waiau River, Clifden (Altonian)
Beu & Maxwell (1990): Chapter 17; p. 384; pl. 56 a,b.
Synonymy: = Anapepta Finlay, 1930 (Maxwell 1992, p. 168)
Classification: Cancellariidae: Cancellariinae
Description: Height 6-13 mm, elongate-ovate; protoconch either smooth and bulbous, of about 1.5 whorls, or dome-shaped to subcylindrical of 3.5-4 whorls, with 2 (3 in a few species) prominent spiral cords on last whorl. Teleoconch whorls convex or weakly angled; sculpture of strongly prosocline costae (almost obsolete in some species) crossed by spiral cords; no varices. Aperture reniform to ovate; columella subvertical above, twisted strongly to left near middle, bearing 2 prominent plaits. Outer lip lirate within.
Comparison: Brocchinia is superficially similar to Inglisella Finlay, 1924 (see Pl. 22c) but differs in having a protoconch with strong spiral cords on the last whorl (Inglisella has axial costellae on the later part of the last whorl), in having strongly prosocline axial costae (but no varices), and in having a reniform aperture (in Inglisella the columella is almost straight and the aperture is trigonal).
Distribution: Bortonian-Recent, New Zealand; Recent, Australia; Europe; more-or-less cospmopolitan. Fossil species of Brocchinia are recorded from a wide range of lithofacies indicating depositional environments extending from very shallow waters down into the upper bathyal zone.
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
(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)