Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
(Pl. 1l, m): paratype, GS10195, I44/f8486, Boulder Hill, Wangaloan (TM4123, GNS)
Beu & Maxwell (1990): Chapter 5; p. 78; pl. 1 l, m.
Synonymy: Cucullaea (Cucullona) inarata Finlay & Marwick 1937, p. 18
Type species of Cucullona Finlay & Marwick, 1937
Description: Moderately large for family (length 65-90 mm), robust, rounded-oblong, strongly inflated, subequilateral; umbones large, rounded. A well developed radial sulcus running from umbones to upper part of posterior margin. Exterior smooth except for growth ridges and almost totally submerged radial elements that become accentuated by weathering. Hinge heavy, with 4 prominent, long, subhorizontal, transversely grooved teeth at each end, median part with numerous irregular denticles. Adductor muscle scars large, posterior scar with prominent myophoric ridge. Internal margin strongly crenulate.
Comparison: Readily distinguished from other New Zealand species of Cucullaea by its almost completely submerged radial sculpture.
Distribution: Wangaloan, Boulder Hill (type); Wangaloa (rather uncommon at both localities).
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)