Lewis, D. N. & Ensom, P. C. 1982. Archaeocidaris whatleyensis sp. nov. (Echinoidea) from the Carboniferous Limestone of Somerset, and notes on echinoid phylogeny. Bulletin of the British Museum (Natural History), Geology Series 36, 77-104.
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Lewis, D. N.; Ensom, P. C.
1982
Archaeocidaris whatleyensis sp. nov. (Echinoidea) from the Carboniferous Limestone of Somerset, and notes on echinoid phylogeny
Bulletin of the British Museum (Natural History), Geology Series