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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 ...
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 ...
Camouflaged porcupine ray. Myliobatiformes (/ m ɪ l i ˈ ɒ b ə t ɪ f ɔːr m iː z /) is one of the four orders of batoids, cartilaginous fishes related to sharks. [2] [3] They were formerly included in the order Rajiformes, but more recent phylogenetic studies have shown the myliobatiforms to be a monophyletic group, and its more derived members evolved their highly flattened shapes ...
The common eagle ray reaches up to 183 cm (6.0 ft) in total length [3] and has a disc width up to 80 cm (2.6 ft). [4] Most specimens are, however, smaller. [5] Females grow to be larger than males. [6]
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At present, it is known to exist only in the eastern Arabian Sea, parts of South Asia and Australia and Papua New Guinea. [2] The narrow sawfish is bentho-pelagic and is found at depths of about 100 meters (330 feet). The narrow sawfish prefers soft bottom-substrates, such as sand, mud, or seagrass, to rocky or coraline habitats.
The panrays are a genus, Zanobatus, of rays found in coastal parts of the warm East Atlantic Ocean, ranging from Morocco to Angola. [1] It is the only genus in the family Zanobatidae, which is included in the Myliobatiformes order, [2] but based on genetic evidence some authorities place it in Rhinopristiformes [3] [4] or a sister taxon to Rhinopristiformes.
Guitarfish have a body form intermediate between those of sharks and rays. The tail has a typical shark-like form, but in many species, the head has a triangular, or guitar-like shape, rather than the disc-shape formed by fusion with the pectoral fins found in other rays.
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