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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 ...
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)
In a review of 10 North American and European public aquariums that kept sawfish, their tanks were all very large and ranged from about 1,500,000 to 24,200,000 L (400,000–6,390,000 US gal). [60] Individuals in public aquariums often function as "ambassadors" for sawfish and their conservation plight.
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From hero to zero. Ten years ago, Russell Wilson was the talk of the NFL. He had led the Seahawks to a dominant victory at Super Bowl 48, the franchise’s first ever title, in just his second ...
Rhina ancylostoma, also known as the bowmouth guitarfish, shark ray or mud skate, is a species of ray and a member of the family Rhinidae.Its evolutionary affinities are not fully resolved, though it may be related to true guitarfishes and skates.
He knew the body parts were stolen, a federal indictment says. The tattoo artist also traded other human remains for the body parts. He and Pauley exchanged over $100,000 during the course of ...
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