Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
(Pl. 15c): holotype, GS7166, I40/f7551, Brother's Stream, Hakataramea Valley, Waitakian (TM4932, GNS)
(Pl. 15g): holotype, GS7166, I40/f7551, Brother's Stream, Hakataramea Valley, Waitakian (TM4932, GNS)
Beu & Maxwell (1990): Chapter 10; p. 159; pl. 15c, g.
Synonymy: Typhis (Hirtotyphis) panoplus Maxwell 1971, p. 778
Classification: Muricidae: Typhinae
Description: Moderately large for genus (height 20-40 mm), biconic, spire 0.4-0.5 total height. Protoconch subcylindrical, of 2 smooth, convex whorls. Teleoconch of 4.5-6 whorls, each with 4 varices. Varices on last whorl with 3 prominent, tubular, slightly backward-curved spines, the topmost somewhat stronger than the others; varices on spire whorls typically with only top spine exposed but middle one exposed as well on some specimens. Intervariceal tubes long, directed backwards and upwards at 30-40°; terminal tube very long and slightly curved, up to half shell height in length. Aperture subcircular, peristome continuous, slightly reflected.
Comparison: Typhis panoplus differs from species of Typhis (sensu stricto) (e.g. T. hebetatus, Pl. 20r) in having three prominent spines on each varix on the last whorl, rather than the four to six much smaller ones present in the latter group. The only other known New Zealand species of Hirtotyphis, T. (Hirtotyphis) aoteanus (Tongaporutuan, Wairarapa), differs from T. panoplus in having the adapical variceal spine much stouter and the abapical spine heavily reduced.
Distribution: Waitakian; Brother's Stream, Hakataramea (type); Sisters' Creek, Hakataramea; Trig Z, Otiake. Uncommon at all 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)