Conus berryi
(Spieker, 1922)
Shell
small, biconic, the altitude little more than 1,5 times the diameter, and
the cone of the body whorl about 1.5 times the length of the spire. Whorls
about 9 in number, the sur
face of each whorl
inclined from the suture to a sharp keel, from which it recurved to the suture.
The spire is thus
turreted. The keel is waved, giving the spire a coronate
appearance. Sculpture of slightly arcuate lines of growth on the spire ; on the
sides of the body whorl are spiral
bands separated by narrow interspaces. The lower bands are
very sharply defined, but they decrease in sharpness of definition
above. Faint lines of growth cross the bands. The aperture
is narrow (1).
Height, 17; diameter, 10.75 mm.
This species is similar to C. marginatus Sowerby from
Antillean Miocene horizons, from which it differs in having a higher spire,
which is coronate, not smoothly keeled (1).
C.multiliratus
var. gaza Johnson and
Pilsbry is similar to both these forms ; it differs from berryi
in being more tapering, longer, with a proportionally lower spire, the whorls
of which are not coronately keeled (1).
Lower Zorritos.
Hervideras, Zorritos district (1).
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Conus berryi
Plate
I fig. 4 Oligocene Perù |
Bibliografia Consultata
·
(1) - Spieker, E. M., 1922. The Paleontology of the Zorritos
Formation of the North Peruvian Oil Fields. Johns Hopkins University Studies
in Geology, 3: 1 -196
·