Asaphus kotlukovi Russian Trilobite

Asaphus kotlukovi

& cystoid

Geological Time: Middle Ordovician

Size: 48 mm

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

Asaphus kotlukovi represents an evolutionary branch beginning and ending in the Middle Ordovician. It begins a morphological sequence of increasing eye-stalk size, and was progenitor of Asaphus punctatus, and later Asaphus intermedius that had increasingly higher eye stalks.

Also see: Russian Trilobites Gallery Russian Asaphidae Evolution Sequence

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