gigas is probably
correct. They are relatively common and obvious in Pleistocene deposits
in many parts of the Caribbean; I have seen them in various places
in the Bahamas.
being a small island off Puerto Rico fits with the Pleistocene guess;
the large islands and volcanically/tectonically active small islands
(e.g., the Lesser Antilles) may have older fossils, but small islands
on relatively stable crust, such as the Bahamas, are almost entirely
Pleistocene in their surficial deposits... Dr.
- Yes, the
fossil is very definitely from Strombus gigas. I also have a piece of
one collected there about 10 years ago. The place is Icacos Island,
off of Fajardo, Puerto Rico.
The Strombus were quite heavy with their cement-like interiors. This
is why I returned with only one!! (I saw no complete fossils there.)...Carolyn
The mistery fossil could
be an Strombus. Like the canarien Strombus bubonius ( antecessor of
St. latus)...Jose H.
gigas remains moderately
common, though overfishing is a problem in many areas. Although a
fossil specimen is not as colorful as a modern one, it may be easier
to convince a customs agent that you did not collect it alive than
if you find a nice empty modern shell.
In the eastern
U.S., most of the late Pleistocene (ice age) fossil shells are of
living species. Earlier in the Pleistocene, and especially before
the mid-Pliocene (ca. 3.5 million), the proportion of extinct species
is much higher...Dr.
- There are many species
which have been in existence for a long time. Therefore it is possible
to find fossil specimens of them as well as living specimens...Paul