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Elasmobranchs are a subclass of cartilaginous fish that include sharks, rays, and skates. They are characterized by their skeletons made of cartilage rather than bone, as well as their gill slits and paired fins. An example of an elasmobranch is the great white shark, known for its size and predatory behavior. Other notable types include manta rays and stingrays, which are adapted for life on the ocean floor.
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Want is the scientific name for shark?
Elasmobranch
What is a rhincodo n?
A Rhincodon is a genus of elasmobranch fishes that contains only the Whale Shark - according to online dictionaries...
What are called elasmobranch?
Elasmobranch is a class of fishes with bones made of cartilage. It includes sharks, skates and rays. Cartilage is the material that is in your nose and ears. Their only real bones are teeth and jaws. They are a very old, successful class of fishes. There were sharks before there were dinosaurs. Because they lack bones, there are very few fossils of older sharks. Sharks are endangered now because their cartilaginous fins are prized for soup in some cultures.
What is the different between elasmobranchii and holocephali?
Teleost fish The endoskeleton made of bone. Gills covered by operculam. Homocercal tail. Oviparous. ELASMOBRANCH endoskeieton made of cartilage. Gill slits present,not covered. Viviparous. Heterocercal tail.
What has the author Marjorie Jane Johns written?
Marjorie Jane Johns has written: 'Taxonomy and biostratigraphy of Middle and Late Triassic elasmobranch ichthyoliths from northeastern British Columbia' -- subject(s): Animals, Fossil, Fossil Animals, Ichthyoliths, Paleontology
How many chromosomes do stingray have?
Stingrays typically have between 28 to 34 chromosomes, depending on the species. Like other members of the elasmobranch class, their chromosomal count can vary, but this range is commonly observed among various stingray species. Chromosome numbers can provide insights into their evolutionary relationships and genetic diversity.
What is the definition of shark?
Any one of numerous species of elasmobranch fishes of the order Plagiostomi, found in all seas., A rapacious, artful person; a sharper., Trickery; fraud; petty rapine; as, to live upon the shark., To pick or gather indiscriminately or covertly., To play the petty thief; to practice fraud or trickery; to swindle., To live by shifts and stratagems.
What is the connotative meaning of shark?
Any one of numerous species of elasmobranch fishes of the order Plagiostomi, found in all seas., A rapacious, artful person; a sharper., Trickery; fraud; petty rapine; as, to live upon the shark., To pick or gather indiscriminately or covertly., To play the petty thief; to practice fraud or trickery; to swindle., To live by shifts and stratagems.
Denotation meaning of shark?
Any one of numerous species of elasmobranch fishes of the order Plagiostomi, found in all seas., A rapacious, artful person; a sharper., Trickery; fraud; petty rapine; as, to live upon the shark., To pick or gather indiscriminately or covertly., To play the petty thief; to practice fraud or trickery; to swindle., To live by shifts and stratagems.
Are there any mammal sharks?
Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalid eugenedontidans.
How long have stingray been around?
Stingrays have been around for over 100 million years, with their origins tracing back to the Late Cretaceous period. They are part of the elasmobranch group, which includes sharks and skates, and have evolved into various species adapted to different marine environments. Their distinctive flat bodies and long, whip-like tails have made them successful inhabitants of oceans and coastal regions.
How long have manta rays existed?
Manta rays have existed for approximately 20 million years, with their origins tracing back to the evolutionary lineage of rays and sharks. Fossil evidence indicates that their ancestors date back even further, to around 200 million years ago during the Mesozoic era. Today, manta rays are considered highly adapted and specialized members of the elasmobranch family.
