Keywords

#ptychagnostidae

Ptychagnostidae

Extinct family of trilobites

Ptychagnostidae is a family of agnostid trilobites from the 5th Stage to the Paibian Age of the Cambrian. The family includes several important index fossils.

Thu 29th

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Ptychagnostidae Ptychagnostus Agnostida Ptychagnostus atavus Lejopyge laevigata Pentagnostus Peronopsidae 2012 in arthropod paleontology 2016 in arthropod paleontology
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