Artiopoda - Agnostida - Ptychagnostidae
Alternative combinations: Acidusus atavus, Agnostus atavus, Ptychagnostus (Acidusus) acidusus, Ptychagnostus (Acidusus) atavaus
Full reference: S. A. Tullberg. 1880. Om Agnostus-arterna i de Kambriska aflagringame vid Andrarum. Sveriges Geologiska Undersökning (series C) 42:1-37
Belongs to Ptychagnostus according to P. S. Hong and D. K. Choi 2015
See also Öpik 1979, Tullberg 1880, Weidner and Nielsen 2014 and Westrop et al. 1996
Sister taxa: Ptychagnostus (Acidusus), Ptychagnostus (Ptychagnostus), Ptychagnostus acidusus, Ptychagnostus affinis, Ptychagnostus akanthodes, Ptychagnostus aksayensis, Ptychagnostus convexus, Ptychagnostus cuyanus, Ptychagnostus intermedius, Ptychagnostus karatauensis, Ptychagnostus punctuosus, Ptychagnostus richmondensis, Ptychagnostus seminula, Ptychagnostus sinicus, Ptychagnostus spinosus, Zeteagnostus incautus, Zeteagnostus scarifatus, Triplagnostus (Aristarius) aristarius
Type specimen: LO354T, a cephalon/head
Ecology: nektonic suspension feeder
Distribution:
• Cambrian of Australia (4 collections), Canada (4: New Brunswick, Newfoundland and Labrador), China (24), Kazakhstan (8), Mexico (1), Norway (1), United States (14: Montana, Nevada, Utah)
Total: 56 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.