Dabasacanthus inskasi ?
Dabasacanthus inskasi Zangerl, 1979 ?
Middle Pennsylvanian
Pit 11
Mazon Creek
Illinois
USA
Close up of first dorsal spine
By oilshale
Dabasacanthus inskasi Zangerl, 1979 ?
Middle Pennsylvanian
Pit 11
Mazon Creek
Illinois
USA
Close up of first dorsal spine
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