Palaeospinax Explained

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.^[1]

Other species originally described as Synechodus were transferred to the genus Palidiplospinax.

Further reading

• Maisey. J. G.. The fossil selachian fishes Palaeospinax Egerton, 1872 and Nemacanthus Agassiz, 1837. Zoological Journal of the Linnean Society. 1977. 60. 3. 259–273. 10.1111/j.1096-3642.1977.tb01029.x.

Notes and References

1. Klug. Stefanie. Kriwet, Jürgen. A new basal galeomorph shark (Synechodontiformes, Neoselachii) from the Early Jurassic of Europe. Naturwissenschaften. 2008. 95. 5. 443–448. 10.1007/s00114-007-0341-0. 18196213. 2008NW.....95..443K. 8460659 .