Conus
catenatus (Sowerby I, 1849)
Description.
Testa oblongo-turbinata, spira producta,
mucronata, anfractibus canaliculatus, ultimo anfractu laevi, antice sulcato,
liris nonnullis granosis, sulcis altyernantibus, granis paucis, parvis,
distantibus (1).
Shell
large, spire moderately high, shoulder truncated. First few post nuclear whorls
bearing tubercles that generally are eroded. Base of aperture wide, not notched.
Siphonal fasciole hardly discernible. Outer lip very strongly retractive, anal
notch very deep. Anal fasciole concave, bearing a few obscure threads.
Sculpture consisting of spiral bands that are narrower on anterior half of body
whorl.
Length
60.4 mm.; diameter 33 mm. (figured specimen). Length 66.2 mm.; diameter 36.3
mm. (largest specimen).
Type
locality.—Dominican Republic (Miocene).
The very strongly retractive outer
lip gives this species an un mistakable appearance. Sixteen specimens are in
the Duerden collec tion. The type has not been figured, but Sowerby's
description leaves little doubt. In the Dominican Republic it is found only in
the Gurabo formation. The body whorl of these Dominican shells is less strongly
sculptured than in those from Bowden, but the spiral threads on the anal
fasciole are stronger.
C. cacuminatus Spieker (Johns
Hopkins Univ. Studies in Geology No. 3, pp. 40–41, pl. 1, fig. 5, 1922), a
species from the middle Miocene Zorritos formation of Peru, is stouter and has
a lower spire, weaker sculpture, and a less strongly retractive outer lip.
C. centurio Born, a living
West Indian species, has a higher spire and shallower anal fasciole, and its
outer lip is not quite so strongly retrac tive.
Other localities.—Gurabo formation (middle Miocene),
Dominican Republic. Gatun
formation (middle Miocene), Costa Rica. ? Upper Miocene,
Springvale, Trinidad.Type material.-Holotype (British Museum, Natural History,
Geological Department, Geol. Soc. London No. 12798).
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Conus catenatusPl. IX Fig. 2 |
Conus catenatusGG20021 |
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Conus catenatus |
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Conus catenatus (Sowerby I, 1849) mm.
25,9 x 12,26 – Miocene - Gatun Fm. -
Panama [AZFC N. 509-01]
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Bibliografia Consultata
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(1)- Sowerby (i), G. B. Sr., 1849. Description of new species of fossil
shells found by J. S. Heniken, Esq.. The Quarterly Journal of the
Geological Society of London, 6: 44 -53