 This
is a specimen of an exceptionally rare Russian Ordovician trilobite
from the Asery Horizon of the Wolchow River region near Saint
Petersburg, Russia, the
Odontopleurid Apianurus
kuckersianus. It is so rare that few have seen one, with only a
few complete specimens known as of 2005. The genus Apianurus
was assigned in 1968. Previously, the trilobite was
asigned to Acidaspis, another trilobite with odd morphology.
Apianurus kuckersianus is thought to be ralated to
Devonian trilobite genera Koneprusia, Dicranurus, and Ceratonurus.
Note the abundant tubercules present on the the cephalon,
thorax, and pygidium. The species name kuckersianus, comes from
the Kuckers
region of Estonia, where fragmentary remains of the species have
been collected.
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