Coppard, S.E. (2008). A comparative analysis of the spatangoid echinoid genera Brissopsis and Metalia: a new genus and species of spatangoid (Echinodermata: Echinoidea: Brissopsidae) from the Philippines and the reassignment of Brissopsis persica to Metalia. Zootaxa, 1760, 1-23
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Coppard, S.E.
2008
A comparative analysis of the spatangoid echinoid genera Brissopsis and Metalia: a new genus and species of spatangoid (Echinodermata: Echinoidea: Brissopsidae) from the Philippines and the reassignment of Brissopsis persica to Metalia.