Trilobita - Agnostida - Ptychagnostidae

Alternative combination: Agnostus intermedius

Belongs to Ptychagnostus according to Robison 1984

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

Ecology: nektonic suspension feeder