Name: Illaenus incisus Russian trilobites
Age: Middle Ordovician
Size (25.4 mm = 1 inch): 79 mm long by 39 mm wide on a 90 by 30 mm matrix
Location: Asery Horizon deposits of the Wolchow River region near Saint Petersburg, Russia
 Description:
This is an example of the rarely offered trilobite, Illaenus incisus. The genus
derives its specific name from the cut (incised) appearance to its thoracic segments,
This is one of the 50-odd members of the genus, and known for the high profile
of the cephalon which is thought to have aided the trilobite in plowing through
the substrate in search of a meal. This one is presented wrapped atop its matrix
that has a flattened base for display from any aspect. This is the only example
of the taxon I have been able to secure in four years, and as such will help fill
the gap in any collection of these unusual Russian trilobites. |
