excerpts and figures from:   Błażejowski, B., Brett, C.E., Kin, A., Radwański, A., & Gruszczyński, M. (2016) Ancient animal migration: a case study of eyeless, dimorphic Devonian trilobites from Poland. Palaeontology, 59:743-751     ABSTRACT We report evidence of one of the oldest known animal migratory episodes in the form of queues of the eyeless trilobite Trimerocephalus chopini Kin & Błażejowski, from the Late Devonian (Famennian) of central Polan