RARE COMPLETE CRETACEOUS NAUTILUS FOSSIL
WITH MORTAL INJURY FROM THE UNITED STATES
Jonah Formation - North Central Texas, USA
PERIOD (MIDDLE SANTONIAN STAGE) : 85 - 84 million years ago
While not an ammonite, this
creature is a member of the ammonoid family hence, the listing in this
section. It is really quite an interesting specimen of a
Cretaceous nautilus species called Eutrephoceras campbelli and is
the first nautilus of this type and formation we have ever offered.
It is also the only example we have to offer so it is indeed, a unique
What makes it especially desirable is the mortal injury the fossilized
shell displays - two massive cracks from being crushed when alive.
The disarticulation of the shell can be seen with two cracks that would
have proved fatal to the creature. It is highly likely this was
crushed in the jaw of a predator such as a mosasaur. When alive,
the cracked shell would have still been held intact by internal tissue
and looked just as it does in the position it is in now. (The
disarticulation would seen here would not have been caused over time in
the fossilization process) When mosasaurs attacked ammonites and
nautili, they did not do so to swallow immediately the prey but to
injure. This was done with a crushing bite to crack the shell and
immobilize the creature. The ammonoid meal would have then been
extracted from the shell and eaten.
A superb and unusual fossil
specimen coming with out highest recommendation! Full inflation
and shell segment detail evident.
This is a top-grade example
of prehistoric marine predation!
quality ammonoid specimens from
the USA are NOT common and not mined commercially compared to the much
more prevalent Moroccan and Madagascar types always seen for sale.
This unique species hails from the same time period as
many of North America's famous dinosaurs and is a superbly preserved as
well as a wonderfully aesthetic display fossil.
VERY UNCOMMON NAUTILUS FOSSIL WITH SHELL
INJURY POSSIBLY FROM A MOSASAUR ATTACK!
Item - One Only