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Pentagonoceras spinosum
Taxonomy
Pentagonoceras spinosum was named by Zhao et al. (1978). Its type specimen is NIGP 14946 and is a 3D body fossil. Its type locality is Mao'ertang Section, Dalong Fm, Shangsi, Guangyuan County, which is in a Changhsingian deep-water siliciclastic in the Dalong Formation of China.
Sister species lacking formal opinion data