Ptychagnostidae

Ptychagnostidae
Temporal range: Wuliuan - Paibian
Ptychagnostus gibbus
Ptychagnostus cuyanus
Scientific classification Edit this 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

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.

  1. ^ Cite error: The named reference pdb was invoked but never defined (see the help page).