Altitudella
''Altitudella'' is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million .... References Cambrian trilobites Ptychopariida genera Ptychopariidae {{Ptychopariida-stub ...
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Ptychopariidae
Ptychopariidae is a family of trilobites, containing the following genera: *'' Achlysopsis'' *'' Altikolia'' *'' Altitudella'' *'' Amecephalites'' *'' Asthenopsis'' *'' Austinvillia'' *'' Balangcunaspis'' *''Bashania'' *'' Bathyholcus'' *'' Bathyocos'' *'' Billingsaspis'' *'' Binodaspis'' *''Blairella'' – see '' Neoblairella''  *'' Bolaspidina'' *'' Brunswickia'' *'' Bulkuraspis'' *'' Caborcella'' *'' Callidaspina'' *'' Callidaspis'' *'' Cathayanella'' *'' Champlainia'' *'' Chengshanaspis'' *'' Chinghisicus'' *'' Chunghwaella'' *'' Conopolus'' *'' Dananzhuangia'' *'' Deltina'' *'' Douposiella'' *'' Elrathina'' *'' Entsyna'' *'' Eodouposiella'' *'' Eokochaspis'' *'' Eosoptychoparia'' *'' Eospencia'' *'' Eurostina'' *'' Finecrestia'' *'' Gaotanaspis'' *'' Gaphuraspis'' *'' Gedongaspis'' *'' Gunnia'' *'' Hadrocephalites'' *'' Hadrokraspedon'' *'' Hamptonella'' *'' Hejinaspis'' *'' Hemicricometopus'' *'' Hewenia'' *'' Holasaphus'' *'' Horbusonia'' *'' Illtydaspis'' *'' Jangudasp ...
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