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By Prof. Paul Scofield
- Canterbury Museum |
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Conospira rivertonensis n. sp. (Plate 56,
fig. 13.) Shell of
moderate size, rather slender, with nodular periphery and exsert spire. Apex
lost. Twenty-two small vertically elongate nodules per whorl on the
peripheral carina (interstices twice their width); no other axial sculpture
except slightly curved growth-lines. Two spiral grooves crossing lower part
of nodular row; upper half of body-whorl smooth, lower half with a number of
grooves, faint above and with wide spaces between, closer and stronger below.
Spire half height of aperture, outlines faintly convex. Whorls medially
sharply carinate, straight above and below, shoulder steep, then sloping in
below. Suture distinct. Aperture very long, slot-like, angled above, open
below, base not notched. Sinus typical, fairly deep on shoulder, very gentle
curve below. Pillar straight, slanting, with a single interior very oblique
twist and deep groove low down. Height, 33
mm.; diameter, 12 mm. Locality.—Pourakino
sands, Riverton (Ototaran ?); one specimen. Type in
Finlay collection. Related to Conospira
(Misspelt “Cenospira” at the reference quoted) bimutata Finlay (Trans.
N.Z. Inst., vol. 55, p. 498, 1924), but readily distinguished by longer and
more exsert spire and narrower shell. |
Bibliografia Consultata