Ptychagnostidae
Extinct family of trilobites / From Wikipedia, the free encyclopedia
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Ptychagnostidae is a family of agnostid trilobites from the 5th Stage to the Paibian Age of the Cambrian (509 to 497 million years ago).[1] The family includes several important index fossils.
Quick Facts Scientific classification, Type genus ...
Ptychagnostidae | |
---|---|
Ptychagnostus gibbus | |
Ptychagnostus cuyanus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | †Trilobita (?) |
Order: | †Agnostida |
Superfamily: | †Agnostoidea |
Family: | †Ptychagnostidae Kobayashi, 1939 |
Type genus | |
Ptychagnostus Jaekel, 1909 | |
Genera | |
See text |
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