| Elasmobranchii (rays and sharks) | ||||||||
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 Great white shark, Carcharodon carcharias
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Batoidea (rays and skates) |
Elasmobranchii is the subclass of cartilaginous fish that includes skates, rays (batoidea), and sharks (selachii). The great white shark, Carcharodon carcharias, also known as white pointer, white shark, or white death, is an exceptionally large lamniform Chordates ( Phylum Chordata) are a group of Animals that includes the Vertebrates together with several closely related Invertebrates Chondrichthyes or cartilaginous fishes are jawed Fish with paired fins paired nostrils scales two-chambered hearts and skeletons made of Cartilage rather Charles Lucien (Carlo Jules Laurent Bonaparte 2nd Prince of Canino and Musignano ( May 24, 1803 &ndash July 29, 1857) was a French Batoidea is a Superorder of cartilaginous fish containing more than 500 described species in thirteen families Sharks ( Superorder Selachimorpha) are a type of Fish with a full cartilaginous Skeleton and a highly streamlined body A class is the Taxonomic rank in the Biological classification of organisms in Biology below phylum and above order. Chondrichthyes or cartilaginous fishes are jawed Fish with paired fins paired nostrils scales two-chambered hearts and skeletons made of Cartilage rather Skates are cartilaginous fish belonging to the family Rajidae in the superorder Batoidea of rays Batoidea is a Superorder of cartilaginous fish containing more than 500 described species in thirteen families Sharks ( Superorder Selachimorpha) are a type of Fish with a full cartilaginous Skeleton and a highly streamlined body
Summary
Elasmobranchii is one of the two subclasses of cartilaginous fishes in the class Chondrichthyes, the other being Holocephali (chimaeras). Chondrichthyes or cartilaginous fishes are jawed Fish with paired fins paired nostrils scales two-chambered hearts and skeletons made of Cartilage rather Subclass Holocephali is a taxon of cartilaginous fishes of which the order Chimaeriformes is the only surviving group Chimaeras are cartilaginous fish in the order Chimaeriformes. For features that distinguish Elasmobranchii from Holocephali, see those articles. This classification includes great white sharks and the extinct megalodon. The great white shark, Carcharodon carcharias, also known as white pointer, white shark, or white death, is an exceptionally large lamniform The megalodon (ˡmɛgələˌdɒn or MEG -a-la-don meaning "big tooth" or in Greek as μέγας 'οδόντος was a giant Shark
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. gas bladder (also fish maw, less accurately swim bladder or air bladder) is an internal organ that contributes to the ability of a Fish A gill is an anatomical structure found in many aquatic organisms A dorsal fin is a Fin located on the backs of some Fishes Whales Dolphins and Porpoises as well as the (extinct The teeth are in several series; the upper jaw is not fused to the cranium, and the lower jaw is articulated with the upper. The eyes have a tapetum lucidum. The tapetum lucidum ( Latin: "bright tapestry" plural tapeta lucida) is a layer of tissue in the Eye of many Vertebrate animals that The inner margin of each pelvic fin in the male fish is grooved to constitute a clasper for the transmission of sperm. The term sperm is derived from the Greek word (σπέρμα sperma (meaning "seed" and refers to the male reproductive cells. These fishes are widely distributed in tropical and temperate waters. The Tropics are centered on the Equator and limited in Latitude by the Tropic of Cancer in the northern hemisphere at approximately 23°26' (23 [1]
References
- ^ Bigelow, Henry B. ; Schroeder, William C. (1948). Fishes of the Western North Atlantic. Sears Foundation for Marine Research, Yale University, pp. 64-65. ISBN B000J0D9X6.
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