Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
(Pl. 57k): Linopyrga rugata (Hutton, 1886) (type species of the genus); GS14430, Y14/f7505I, Te Piki, near East Cape (Haweran) (oblique basal view showing continuous peristome).
(Pl. 57l): Linopyrga rugata (Hutton, 1886) (type species of the genus); GS14430, Y14/f7505I, Te Piki, near East Cape (Haweran)
Beu & Maxwell (1990): Chapter 17; p. 388; pl. 57 k,l.
Classification: Pyramidellidae: Odostomiinae
Description: Height 2.2-4.5 mm, ovate-come to elongate-ovate, spire varying considerably in height. Protoconch tilted, helicoid, of about 1.5 whorls. Teleoconch whorls flat-sided or gently convex; sculpture of prominent prosocline costae dying out gradually on base, and spiral threads between costae and on base. Aperture ovate, peristome continuous, columella with distinct plait; outer lip smooth within.
Comparison: Linopyrga is characterised by the prominent prosocline costae and distinct intercostal spiral threads, and by the continuous peristome. Bartrumella Laws, 1940 is similar, but has a planorboid protoconch, and axial costae that are orthocline or slightly opisthocline rather than prosocline.
Distribution: Duntroonian-Recent, New Zealand, mostly in inner to mid-shelf faunules.
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)