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  2. Elasmobranchii - Wikipedia

    en.wikipedia.org/wiki/Elasmobranchii

    Elasmobranchii is one of the two subclasses of cartilaginous fish in the class Chondrichthyes, the other being Holocephali . Members of the elasmobranchii subclass have no swim bladders, five to seven pairs of gill clefts opening individually to the exterior, rigid dorsal fins, and small placoid scales. The teeth are in several series; the ...

  3. Batomorphi - Wikipedia

    en.wikipedia.org/wiki/Batomorphi

    Batomorphi is a clade of cartilaginous fishes, commonly known as rays, this taxon is also known as the superorder Batoidea, but the 5th edition of Fishes of the World classifies it as the division Batomorphi. [2]

  4. Chondrichthyes - Wikipedia

    en.wikipedia.org/wiki/Chondrichthyes

    Elasmobranchii is a subclass that includes the sharks and the rays and skates. Members of the elasmobranchii have no swim bladders, five to seven pairs of gill clefts opening individually to the exterior, rigid dorsal fins, and small placoid scales. The teeth are in several series; the upper jaw is not fused to the cranium, and the lower jaw is ...

  5. Ostracoderm - Wikipedia

    en.wikipedia.org/wiki/Ostracoderm

    Many had hypocercal tails in order to generate lift to increase ease of movement through the water for their armoured bodies, which were covered in dermal bone. They also had sucking mouth parts and some species may have lived in fresh water. The taxon contains the subgroups Heterostraci, Astraspida, Arandaspida. † Thelodonti (extinct)

  6. Category:Elasmobranchii - Wikipedia

    en.wikipedia.org/wiki/Category:Elasmobranchii

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  7. Sandbar shark - Wikipedia

    en.wikipedia.org/wiki/Sandbar_shark

    The sandbar shark, true to its nickname, is commonly found over muddy or sandy bottoms in shallow coastal waters such as bays, estuaries, harbors, or the mouths of rivers, but it also swims in deeper waters (200 m or more) as well as intertidal zones.

  8. Prickly shark - Wikipedia

    en.wikipedia.org/wiki/Prickly_shark

    The prickly shark (Echinorhinus cookei) is one of the two species of sharks in the family Echinorhinidae (the other one is the bramble shark), found in the Pacific Ocean over continental and insular shelves and slopes, and in submarine canyons.

  9. Hexanchiformes - Wikipedia

    en.wikipedia.org/wiki/Hexanchiformes

    Their excretory and digestive systems are also unspecialised, suggesting that they may also resemble those of their primitive shark ancestors. Their most distinctive feature, however, is the presence of a sixth, and, in two genera, a seventh, gill slit, in addition to the five found in all other sharks. [ 15 ]

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