grinnellaspis, extinct, genus, from, well, known, class, fossil, marine, arthropods, trilobites, lived, during, early, part, arenig, stage, ordovician, period, faunal, stage, which, lasted, from, approximately, million, years, temporal, range, early, arenig, c. Grinnellaspis is an extinct genus from a well known class of fossil marine arthropods the trilobites It lived during the early part of the Arenig stage of the Ordovician Period 1 a faunal stage which lasted from approximately 478 to 471 million years ago GrinnellaspisTemporal range Early Arenig 1 Conservation status Fossil Scientific classification Kingdom Animalia Phylum Arthropoda Class Trilobita Order Proetida Genus GrinnellaspisReferences edit a b Sepkoski Jack 2002 A compendium of fossil marine animal genera Trilobita entry Bulletins of American Paleontology 364 560 Archived from the original on 2006 09 05 Retrieved 2008 01 12 nbsp This Proetida related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Grinnellaspis amp oldid 916997840, wikipedia, wiki, book, books, library,
