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Petalodontiformes

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Most species are known only from isolated teeth. All fossils range from the Carboniferous to the Permian, where they are presumed to have died out during the Permian/Triassic extinction event.

The two best known species are Belantsea montana, from the Carboniferous Bear Gulch, Montana, and Janassa bituminosa, from the upper Permian of Europe, as whole fossil specimens have been found of these two.

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Monotypic taxonTaxonomic group with only one subordinate taxonSpecies descriptionFormal description of a discovered speciesParaphylyType of taxonomic groupIUCN Red ListInventory of the global conservation status of biological speciesSubtropicsGeographic and climate zoneCommon nameName generally used for a taxon, group of taxa or organism(s)