Ordovician Trinucleid Trilobite from Virginia
Trilobita, Trilobite Order
Asaphida, Family Trinucleidae
Time: Upper Ordovician
Well-preserved example of a member of the Order Asaphida, Family
Trinucleidae, with genal spines, a feature often not preserved intact.
The cephalic pits (fenestrae) are also evident, the means by which
this trilobite filtered detritus from the seafloor. The trilobite
presumably hovered at the seafloor, using its legs to kick up particulates
which then passed through the cephalic ring. Overall, a fine example
of the taxon, rarely offered this complete.