Distribution of echinoids and palaeozoogeographic units of the Cenomanian-Santonian basins of the Caucasus and Mediterranean regions

Based on the palaeontological materials of the Cenomanian, Turonian, Coniacian and Santonian in the Caucasus, taxonomic composition, geographic distribution and migration routes of sea urchins are presented. Furthermore the possibility of identifying zoogeographic units in the Late Cretaceous basins of the Caucasus are discussed