Name: Asaphus expansus
Class Trilobita; Order Asaphida; Superfamily Asaphoidea; Family Asaphidae
Geologic Time: Lower Ordovician
Size: 65 and 47
Fossil Site: Russian trilobites, Kunda level, St. Petersburg region, Wolchow river, Russia
 Asaphus
expansus is one of the older trilobites of the asaphus series from
the Saint Petersburg region of Russia. Coming from the Lower Ordovician
Kunda layer, expansus is believed to be the progenitor of a large
majority of the more than 30 Russian Asaphids, including Asaphus kowalewskii,
the species with the astonishingly long eye stalks. This scarcer of
the Asaphids is a natural double. |
