Трилобити — разлика између измена

| fossil_range = {{Geological range|521|251.902|доњи [[камбријум]] - горњи [[Перм (периода)|перм]]|earliest=540|ref=<ref name="lieberman02">{{Citation |last=B. S. |first=Lieberman |title=Phylogenetic analysis of some basal early Cambrian trilobites, the biogeographic origins of the eutrilobita, and the timing of the Cambrian radiation |journal=[[Journal of Paleontology]] |volume=76 |edition=4 |pages=692–708 |year=2002 |doi=10.1666/0022-3360(2002)076<0692:PAOSBE>2.0.CO;2 |issue=4}}</ref><ref name="Fortey00a">{{citation|title=Trilobite!: Eyewitness to Evolution|first=Richard|last=Fortey|author-link=Richard Fortey |year=2000|isbn=978-0-00-257012-1|publisher=HarperCollins|location=London}}</ref>}} 521–251,902 [[Megaannum|Ma]]