Conus
alaquaensis (Mansfield, 1935)
Shell rather small, thin,
moderately slender, consisting of about 9 whorls in all. Spire turrited, weakly
concave and constituting about one-third shell Length. Protoconch small,
rounded, apparently smooth and apically depressed. Following 5 post-nuclear
whorls strongly carinated above the suture; later whorls less strongly
carinated, the suture falling upon the periphery of the whorl. Spire whorls
marked with obscure spirals and curved growth lines. Face of body whorl and
siphonal fasciole sculptured with 19 moderately narrow, spiral bands separated
by narrower interspaces. These bands extend upward nearly to the carinated
shoulder. The interspaces on the back of the body whorl are either very narrow
or carry a spiral thread. Some of the spiral bands are ornamented with a few
granules. Columella with a weak depression at the lower border. Canal
anteriorly deflected to the left and backward (1).
The holotype
(U.S.N.M.Cat.No.373117) measures: Length 33.3 mm.; greatest diameter, 13.5 mm.;
length of spire, 9.6 mm.
Conus harveyensis
Mansfield, an upper Miocene species, is related to the new species, differing
from the latter in having a stouter shell and wider spiral bands on the body
whorl (1).
Type locality: Station 12046.
Vaughan Creek, upper locality, Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone.
Station 12046, Vaughan Creek, upper locality, Walton County (type locality). A
poorly preserved mold at Station 12049, Red Bay, Walton County, may belong to
the new species.
|
|
Conus alaquaensis (1)
Plate 1 fig. 7 mm. 33,3 x 13,5 |
Bibliografia Consultata
- (1) - Mansfield (1935) “New
Miocene Gastropods and Scaphopods from Alaqua Creek Valley, Florida”