Kingdom Animalia Class Trilobita | Phylum Arthropoda Rank Genus | |
Similar Sphaeragnostus, Agnostidae, Condylopyge, Phalagnostus, Agnostina | ||
Quadragnostus 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.
References
Quadragnostus Wikipedia(Text) CC BY-SA