Oyen, C. W. & Portell, R. W. 1996. A new species of Rhyncholampas (Echinoidea: Cassidulidae) from the Chipola Formation: The first confirmed Member of the Genus from the Miocene of the Southeastern USA and the Caribbean. Tulane Studies in Geology and Paleontology 29, 59-66.
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Oyen, C. W.; Portell, R. W.
1996
A new species of Rhyncholampas (Echinoidea: Cassidulidae) from the Chipola Formation: The first confirmed Member of the Genus from the Miocene of the Southeastern USA and the Caribbean