Trinia Poletaeva, 1956,POLETAEVA, O. K. 1956. Semejstvo Triniidae Poletayeva fam. nov., p. 178–179. In Kiparisova, L. D., Markovskij, B. P., and Radchenko, G. P. (eds.), Materialy po paleontologii. Novye semejstva i rody. Vsesoyuznyi Nauchno-issledovatel'skii Geologicheskii Institut (VSEGEI), Trudy, Novaya Seriya, 12. is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago.
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