Caudillaenus Illaenus Moroccan Trilobite

with preserved holochroal eye facets

Caudillaenus sp.aff. nicolasi

Trilobites Corynexochida, Suborder Illaenina, Superfamily Illaenoidea, Family Illaenidae

Geological Time: Middle Ordovician

Size: Trilobite is 78 mm long

Fossil Site: Jebel Rhyat, Taychoute, Morocco

Caudillaenus nicolasi Moroccan TrilobiteDescription: This unusual trilobite comes from the Ordovician deposits near Taychoute, Morocco. At first glance it looks something like a Paralejurus (see my other listings) , but the age of the deposits and the overall shape shows it is much different. It is a member of the Illaenidae, trilobites more frequently seen from Europe (particularly Russia) and less frequently from North America. I sent photos to one of the most well-versed collectors of Moroccan trilobites, and he told me it was similar to Caudillaenus nicolasi. It is sufficiently different from the one known from Morocco by virtue of its foreshortened pygidium that it is most likely a species new to science. This one has many of the fine holochroal eye facets preserved in the right eye, an uncommon occurrence for many Ordovician trilobites in general, and for Illaenids in particular.

click fossil images to enlarge


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