Illaenus dalmani Russian Trilobite

Name: Illaenus dalmani

Trilobites Order Corynexochida, Suborder Illaenina, Family Illaenidae

Geologic Time: Middle Ordovician

Size (25.4mm=1 inch): 85 mm long by 46 mm wide on a 90 by 59 mm matrix

Fossil Site: Lasnamjagi Horizon, St. Petersburg region, Wolchow river, Russia

Illaenus dalmaniDescription: This is an example of the unusual trilobite Illaenus dalmani. 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. It is also one of the larger members of the genus, with this one representative of an above-average specimen. This one is quite attractively displayed on a pedestal of matrix, and includes a 15 mm Brachiopod as well.

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