EntityQ3215912· pop 6· linked from 106 articlesOlson's ExtinctionSign in to savemass extinction that occurred 273 million years ago in the early Guadalupian of the Permian periodConnectionsAnimaliaEntitydigital object identifierEntityJurassicEntityInternational Standard Serial NumberEntityCretaceousEntityTriassicEntityCambrianEntityChondrichthyesEntityDevonianEntityTetrapodaEntityPermianEntitySilurianEntityCarboniferousEntityOrdovicianEntityQuaternaryEntityPaleogeneEntityNeogeneEntityQ180686EntityEmbryophytesEntityCretaceous-Paleogene mass extinctionEntityCategoriesExtinction eventsGuadalupian extinctionsGuadalupian lifePermian North America