Asaphus holmi Russian Trilobite

Name: Asaphus holmi (Russian Asaphida Trilobites)

Class Trilobita; Order Asaphida; Superfamily Asaphoidea; Family Asaphidae

Geological Time: Middle Ordovician

Size: 115 mm

Fossil Site: Russian trilobites Asery level, St. Petersburg region, Wolchow river, Russia

Asaphus holmi is one of the moderately scarce Russian Asaphids, and near the end of an evolutionary branch decended from Asaphus cornutus. At about 4 1/2 inches in length, it is also near the size limit for the species. It sets fully stretched and inflated centered on a large piece of Ordovician seafloor.

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