Description

Middle Silurian (Niagaran)

Rochester Formation

Middleport, NY, USA

48mm tail in 72mm matrix

Phyllocarid,

Phyllocarids belong to a subclass of crustaceans (Phyllocarida) dating back to the Cambrian.  They are known primarily from their bivalved carapaces – the hardest parts of their anatomy.

The group dates back to the Early Cambrian with one order still living today.