Artiopoda - Agnostida - Ptychagnostidae
Alternative combination: Agnostus intermedius
Belongs to Ptychagnostus according to Robison 1984
Sister taxa: Ptychagnostus (Acidusus), Ptychagnostus (Ptychagnostus), Ptychagnostus acidusus, Ptychagnostus affinis, Ptychagnostus akanthodes, Ptychagnostus aksayensis, Ptychagnostus atavus, Ptychagnostus convexus, Ptychagnostus cuyanus, Ptychagnostus karatauensis, Ptychagnostus punctuosus, Ptychagnostus richmondensis, Ptychagnostus seminula, Ptychagnostus sinicus, Ptychagnostus spinosus, Zeteagnostus scarifatus, Zeteagnostus incautus, Triplagnostus (Aristarius) aristarius
Ecology: nektonic suspension feeder
Distribution:
• Cambrian of Argentina (1 collection), Australia (1), Greenland (1), Kazakhstan (6), United States (10: Nevada, Utah)
• Solvan of Canada (1: Newfoundland and Labrador)
• Amgan of United States (2: Utah)
Total: 22 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.