Chondrichthyes - Symmoriiformes - Symmoriidae
Alternative combination: Physonemus altonensis
Belongs to Stethacanthus according to A. O. Ivanov and O. A. Lebedev 2014
See also Eastman 1903, Hay 1902, Lund 1985 and Williams 1985
Sister taxa: Cladodus hibberti, Stethacanthus compressus, Stethacanthus concavus, Stethacanthus depressus, Stethacanthus erectus, Stethacanthus exilis, Stethacanthus gansuensis, Stethacanthus humilis, Stethacanthus longipeniculus, Stethacanthus praecursor, Stethacanthus productus, Stethacanthus tumidus
Ecology: nektonic carnivore
Distribution:
• Permian of the Russian Federation (3 collections)
• Carboniferous of China (1), United States (8: Illinois, Indiana, Montana, Nebraska, Ohio)
• Devonian of United States (4: Ohio)
Total: 16 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.