latus Russian trilobite
latus (Asaphid Russian Trilobites)
Age: Middle Ordovician
Size: mm (25.4mm=1
inch): 76 on 180 x 140 matirx
Asery level, St. Petersburg region, Wolchow
latus is among the scarcer trilobites in the Russian Asaphid series.
Having a greater breadth to length ratio than its cousins, it is likely
descended from Asaphus holmi. This large speciman is stretched and
inflated on an unusually large piece of Ordovician seafloor.