Revised descriptions of New Zealand Cenozoic Mollusca from Beu and Maxwell (1990)
(Pl. 55h): Strebloceras n.sp.; GS11650, J40/f6612, South Branch, Waihao River near "Pentland Hills", South Canterbury (Mangaorapan?)
(Pl. 55j): Strebloceras n.sp.; GS11650, J40/f6612, South Branch, Waihao River near "Pentland Hills", South Canterbury (Mangaorapan?) (showing protoconch and early part of teleoconch).
Beu & Maxwell (1990): Chapter 17; p. 382; pl. 55 h, j.
Description: Length 1.8-3 mm, protoconch prominent, planorboid, of about 2 whorls; teleoconch a straight or gently twisted, slowly expanding tube of circular cross-section, lacking sculpture apart from growth lines.
Comparison: Strebloceras differs from Caecum Fleming, 1817 and its various subgenera in retaining the protoconch instead of shedding it during development of the teleoconch. Caecum (sensu stricto) is not recorded from New Zealand, and the very small, smooth species C. digitulum (Mangapanian-Recent) and C. pertenuis (Otaian-Altonian, Pakaurangi Point, Northland) were referred to the subgenus Fartulum Carpenter, 1857 by Beu & Maxwell (1990, p. 382).
Distribution: Mangaorapan ?, Altonian-Waiauan, New Zealand; Late Eocene-Oligocene, Europe; Recent, Hawaii.
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)