Crotalocephalus
aff. africanus
Trilobites
Order
Phacopida, Family Cheiruridae
Geological
Time: Devonian
Size (25.4
mm = 1 inch): Trilobite is 63 mm long by 35 mm wide (with spines)
on a 60 by 70 mm matrix
Fossil Site:
Jorf, Morocco
Code: 13166
Price: $2495.00
Description:
Elegant example of a member of the Order Phacopida, Family Cheiruridae
with many fine details present. The most diagnostic features of
this taxon are the sharp pleural and pygidial spines and the distinctive
cephalon. The describer of this one thought it bore a resemblance
to the head of a rattlesnake (Crotalus), hence the genus name.
The spines may have aided it in staying at the surface of the soft
seafloor. It is not to be confused with the common
Crotalocepahlus (actually Crotalocephalina). This
one has more coplanar cheeks than those found in Crotalocephalina,
and much longer pygidial spines. It is closest to the species Crotalocephalus
africanus, but that one is found along the coast of Morocco near
Rabat. There has been increased interest in trilobites from Jorf
leading to discoveries of new types such as this. With the advent
of a reliable source of electricity in Morocco, the quality of
preparation has improved dramatically over the past few years. This
one took over 105 hours to prepare all the pleural spines free
of matrix, and to my knowledge is the first completely
freestanding example offered. While I used to refer to trilobites
prepared in a mode similar to this as flying, I feel a new term
is warranted by the preparation now coming into vogue. This specimen
is truly stunning when viewed from any aspect, and is destined
to become the cornerstone of any collection, public or private.
(I apologize for the less-than-esthetic photography while still
in the shipping container, but discretion was the better part of
valor with all the spines). The many hours taken to prepare such
as stunning example is not without cost, but I am sure you will
agree it is well worth it. |
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