McNamara, K. J. & Philip, G. M. 1984. A Revision of the Spatangoid Echinoid Pericosmus from the Tertiary of Australia. Records of the Western Australian Museum 11, 319-356.
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McNamara, K. J.; Philip, G. M.
1984
A Revision of the Spatangoid Echinoid Pericosmus from the Tertiary of Australia