Phylogeny of lamniform sharks (Chondrichthyes: Elasmobranchii) and the contribution of dental characters to lamniform systematics

@inproceedings{Shimada2005PhylogenyOL,
  title={Phylogeny of lamniform sharks (Chondrichthyes: Elasmobranchii) and the contribution of dental characters to lamniform systematics},
  author={Kenshu Shimada},
  year={2005}
}
  • K. Shimada
  • Published 1 April 2005
  • Environmental Science, Geography
ABSTRACT Lamniform sharks (Chondrichthyes: Elasmobranchii) are common in the fossil record but are represented mainly by isolated teeth. A phylogenetic analysis of 15 extant lamniform species based on 42 morphological characters using Scyliorhinus (Carcharhiniformes) as an outgroup produces a consensus tree with the following generic relationships: [Mitsukurina + [Carcharias + Odontaspis + Pseudocarcharias + Megachasma + [Alopias + [Cetorhinus + [[Isurus + Carcharodon] + Lamna]]]]]. When an… 

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  • J. Maisey
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TLDR
A revised, apomorphy-based definition of elasmobranchs is presented in which they are considered the equivalent of neoselachians, i.e. a monophyletic group of modern sharks and rays which not only excludes all stem and crown holocephalans, but also many Palaeozoic shark-like chondrichthyans and even close extinct relatives of neOSElachian such as hybodonts.
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