Sepkoski, Jack (2002): A compendium of fossil marine animal genera (Chondrichthyes entry). Bulletins of American Paleontology, volume 364, p. 560. [1]Arquivado 10 de maio de 2012 en Wayback Machine.
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Sepkoski, Jack (2002): A compendium of fossil marine animal genera (Chondrichthyes entry). Bulletins of American Paleontology, volume 364, p. 560. [1]Arquivado 10 de maio de 2012 en Wayback Machine.