Conus remondii (Gabb, 1864)
Conus remondii
comstockensis (Tuner, 1938)
Descrizione e caratteristiche:
Shell biconical; spire nearly a third of the total length; whorls six, sloping above, crenulated on the angle; sides straight, regularly conical. Aperture linear, biangular behind, a little narrowed in advance. Surface marked by numerous revolving, impressed lines, and by fainter lines of growth.
Length, usually about 1 inch.
Localities:
Found by Mr. Remond at Cochran's, east of Mount Diablo, and since found at
Bull's Head Point, northeast of Martinez; at Clayton, above the coal ; and at
San Diego (Division B.). Also near Canada, or "Cajon de las Uvas,"
Los Angeles County, whence it was described by Mr. Conrad under the above name.
This shell
resembles C. Rouaulti,
d'Arc., of the French Eocene: see Mem. Soc. Geol. de France, 2
ser., torn. 3, pi. 13, fig. 22. It tapers more regularly
anteriorly, and the surface-markings are less distinct ; it is also more
robust. The specific name Californicus having been used by Hinds for a
recent species, I propose the above name in honor of Mr. Remond, who discovered
the specimens from which I became acquainted with the species.
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Conus remondii (1) Plate 20 fig. 79 Eocene East of Mount Diablo-California |
Univer. Calif. Plesiotype 30960 Plate 56 |
Univer. Calif. Plesiotype 30961 Plate 56 |
2 mm. Eocene Texas Cook Mountain
Formation |
Conus remondii comstockensis (Tuner,
1938)
Shell
unequally biconic, spire about one third of the total length; body whorl
concave in profile ornamented by more than 20 broad, flat bands separated by
incised spirals which grow deeper toward the anterior extremity of the whorl;
tabulation of the shoulder ornamented by seven revolving riblets; growth lines
on body arcuate with convexity toward the aperture. Depth of anal sinus behind
the shoulder slightly greater than half the width of the shoulder; shoulder ornamented
by approximately 18 trigonal nodes which disappear rapidly anterior to the
shoulder.
Distinguished
from C. remondii Gabb by the concave profile of the body whorl, the
spiral riblets on the tabulation of the shoulder, and the spirals covering the
entire body whorl anterior to the shoulder, from C. warreni n. sp. By
its trigonal instead of rectangular nodes around the shoulder.
Western Oregon:
Eocene (4)
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Conus remondii comstockensisType: 33215 Plate 15 fig. 5 mm. 13,1 x 6,8 |
Bibliografia Consultata
- (1)
- Gabb, William M. (1864) – Geolocigal Survey of California. Palaeontology
Pub. By authority of the Legislature of California
- (2)
- Turner (1938) “Stratigraphy and Mollusca of the Eocene of Western
Oregon”
- (3)
- Squires (1988) “EOCENE MACROPALEONTOLOGY OF NORTHERN LOCKWOOD VALLEY,
VENTURA COUNTY, CALIFORNIA”
- (4) - Geology of the
Anlauf and Drain Quadrangles Douglas and Lane Counties, Oregon GEOLOGICAL
SURVEY BULLETIN 1122-D
- (5) - THE
STRATIGRAPHIC AND FAUNAL RELATIONSHIPS OF THE MEGANOS GROUP, MIDDLE EOCENE
OF CALIFORNIA BRUCE L. CLARK University of California
- (6) -Anderson &
Hanna (1925) “Fauna and Stratigraphic Relations of the Tejon Eocene at the
Type Locality in Kern County, California”