Palaeospinax
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Palaeospinax is an extinct genus of synechodontiform cartilaginous fish. Although several species have been described, the genus is considered nomen dubium because the type-specimen of the type species, Palaeospinax priscus, from the Late Triassic-Early Jurassic of Europe lacks appropriate diagnostic characters to define the genus.
Other species originally described as Synechodus were transferred to the genus Palidiplospinax.
Further reading
- Maisey, J. G. (1977). "The fossil selachian fishes Palaeospinax Egerton, 1872 and Nemacanthus Agassiz, 1837". Zoological Journal of the Linnean Society. 60 (3): 259–273. doi:.