Cephalopoda - Goniatitida - Pericyclidae
Alternative combination: Ammonellipsites (Stenocyclus) ballardensis
Full reference: M. Gordon. 1964. Carboniferous Cephalopods of Arkansas. United States Geological Survey Professional Paper 460:1-322
Belongs to Polaricyclus according to D. M. Work and C. E. Mason 2004
See also Gordon 1964
Sister taxa: Polaricyclus bordenensis, Polaricyclus conkini, Polaricyclus minimus
Type specimen: USNM 119479, a shell. Its type locality is USGS 8380, Ballard Shaft, which is in a Chadian carbonate limestone in the Boone Formation of Kansas.
Average measurements (in mm): shell diameter 9.14
Distribution:
• Carboniferous of United States (2: Kansas, Kentucky collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.