Cassubia

Cassubia is an anomalocaridid-like genus from the Early Cambrian of Kashubia - Poland,[1] known from drillcore material, but generally accepted to represent the raptorial appendage of an anomalocaridid.

Etymology
Cassubia is derived from the Latinization of Kaszuby, the region in Poland where the holotype specimen was discovered.[3] The species name refers to its being discovered in Lower Cambrian rocks.

History
The holotype--and only--specimen was recovered from the Kościerzyna borehole, in Lower Cambrian rocks. It was described by Kazimiera Lendzion in 1975 and given the name Pomerania infercambriensis,[4] a name which soon proved to be preoccupied by a Middle Jurassic ammonoid.[3] In his initial description, Lendzion interpreted the fossil as preserving 11 thoracic segments and a chelicera of a Leanchoilia-like arthropod.[4] Subsequent study identified it as an anomalocaridid-like frontal appendage.