Recent molecular studies suggest the Batoidea are not derived selachians as previously thought.
2.
Instead, skates and rays are a monophyletic superorder within Elasmobranchii that shares a common ancestor with the selachians.
3.
The Doctor then destroyed the remaining Cybermen by sabotaging a cannon from the Cybermen's stolen Selachian warship.
4.
When the TARDIS is stolen and Zoe is kidnapped by a Selachian he is forced to intervene in a war.
5.
He separated the aquatic mammals from fish, and knew that sharks and rays were part of the group he called Selach ( selachians ).
6.
His observations on catfish, rays were part of the group he called " Selach " ( roughly, the modern zoologist's selachians ).
7.
Some of his groups of animals, such as " Anhaima " ( animals without blood, translated as invertebrates ) and " Enhaima " ( animals with blood, roughly the vertebrates ), as well as groups like the selachians and cetaceans, are still commonly used today.
परिभाषा
any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates पर्याय: elasmobranch,
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