Conus
asphaltodes (Beets, 1953)
Descrizione.
The holotype
is 54 (+ ?) mm long. The
spire is more
turreted than in C.
petrolei
(see albove), its stepped
whorls being excavated and separated by a keel lying close to the
anterior suture. The
steps are much
more inclined than in C. petrolei and
the profile of the spire is
different too. The apical
portion is damaged but it may be stated that the early whoris bear a granulate
keel which becomes smooth on
the younger whorls. The whorls of the spire
are covered with numerous delicate spiral
striae. The growthlines are well-developed
and more concave than in C. petrolei, the deepest part of the sinus being
more distant from the posterior suture than
in C. petrolei.
Tine body-whorl
is plumper than in C. petrolei and in addition not constricted anteriorly. The columella is not concave
as in C. petrolei and
its basal portion shows
but little curvation. In front of the keel runs
a conspicuous spiral and
anteriorly of this,
numerous delicate spiral striations.
The latter are wider on
the anterior portion of the body-whorl (though more delicate than in C. petrolei) and
separated by conspicuous grooves.
According to
the growth-lines, the
outer lip is
protruding slightly more
than in C. petrolei (1).
The
type is from Waisioe (coll. N.H.B.).
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Conus
asphaltodes (Beets,
1953)
Holotype BNHM
Basel Natural History Museum Waisioe,
Is. of Buton, Celebes
mm. 54 x 26 |
Bibliografia