Trilobita - Agnostida - Ptychagnostidae

Alternative combination: Agnostus cuyanus

Belongs to Ptychagnostus according to Peng and Robison 2000

Sister taxa: Ptychagnostus (Ptychagnostus), Ptychagnostus acidusus, Ptychagnostus aculeatus, Ptychagnostus aksayensis, Ptychagnostus atavus, Ptychagnostus convexus, Ptychagnostus intermedius, Ptychagnostus karatauensis, Ptychagnostus leptus, Ptychagnostus punctuosus, Ptychagnostus seminula, Ptychagnostus sinicus, Ptychagnostus spinosus

Ecology: nektonic suspension feeder