Spectacular Stapeleyella UK Ordovician Trilobites

Description: Well-preserved specimens of a member of the Order Asaphida, Family Trinucleidae, this one is Stapeleyella inconstans. The genal spines and cephalic pits (fenestrae) are 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. In addition, there is a partial. Note the cephalic rim with pits evident. Of the three mostly complete examples one is a most unusual ventral example. Multiple examples are rare, with one with so many examples more rare indeed.