Illaenus incisus Russian Ordovician Trilobite

Russian Trilobites

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

Illaenus incisus Russian TrilobiteDescription: 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.

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