Order Phacopida, Family Acastidae
Time: Middle Devonian
is 65 mm long
Hamar Laghdad Formation, Ofaten, Morocco
Elegant example of the unusual trilobite termed "sail-spined" by
some due to the dramatic row of axial spines found in this species.
This is a large example in an excellent state of preservation,
to become the cornerstone of any trilobite collection. These spines
were a good defense against the fish of their day, affording
a mouthful for any predator with the temerity to attack. Notice
the fine faceting for the eyes, and the panoply of spines that
making for an impressive display from any aspect.
see: Moroccan Trilobites
click to enlarge