Psychopyge elegans Moroccan Trilobite
Size: inches (25.4mm=1
inch): see description
Hamar Laghdad, Alnif, Morocco
trilobite is a member of the Order Phacopida from the Devonian Hamar
Laghdad deposits near Alnif, Morocco known as Psychopyge elegans.
The Asteropyginae have recently undergone extensive revision, with
this one still retaining its name as assigned. This elegant specimen
is 4.0 inches in length from the tip of its rostrum to the ends
of the pygidial spines, and 3.2 inches wide at the genal spines.
It is well-positioned in a reflexed position upon its 4.7 inch by
3.2 inch matrix base. There are many well-preserved eye facets present,
as the photos show. The most notable features of this one, outside
of the rostrum are the OVER FIFTY occipital, axial, and pleural
spines prepared freestaning, a time-consuming procedure well worth
the effort. The reason for the spines is most likely defense from
predators. Fish had recently evolved true jaws, and any advantage
a prey species could muster was a great benefit. Few specimens of
this quality are available annually, with this one of the best I
saw in Tucson this year.