A long trilobite-trackway, Cruziana semiplicata Salter, from the Upper Cambrian of the Holy Cross Mts

Abstract

A long trilobite-trackway, Cruziana semiplicata Salter, found in the Upper Cambrian depoits, of Wielka Wiśniowka in the Holy Cross Mts, is studied and compared both to previously known specimens from the same ichnotope, as well as to Salter's type-locality forms from North Wales. The trilobites mode of life, their behaviour when settling on the sea bottom and the resulting ichnoassemblage characterized by a dominance of Cruziana semiplicata and Rusophycus polonicus forms, were closely comparable in both Polish and Welsh environments.