References / paperLopingian (Late Permian) trilobites from the North Caucasus, Russia, with an overview of their distribution worldwide
Mychko, E.V.
Year2025
Source roleprimary-study
DOI / ID10.26879/1399
Fitness and scope
taxonomy · range · biogeography
Revises Changhsingian North Caucasus material and reviews other Lopingian trilobite occurrences; it constrains late sampled records without making every lineage persist to the boundary.
Claim ledger
fossil-range · mediumThe Trilobita root display retains a rounded 521–252 Ma sampled envelope: approximately 521 Ma marks the widespread early record, and revised Changhsingian material documents survival into the latest Permian; neither endpoint is an exact global FAD or LAD.
claim:taxon:trilobita:root-range-rc39