Facts About Crocodiles
Crocodiles (subfamily Crocodylinae) or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, America and Australia. Crocodylinae, all of whose members are considered true crocodiles, is assessed as a biological subfamily.
A broader sense of the term crocodile, Crocodylidae (which includes Tomistoma), isn’t utilized in this text . The term crocodile here applies to only the species within the subfamily of Crocodylinae. The term is usually used even more loosely to incorporate all extant members of the Crocodylia , which incorporates the alligators and caimans (family Alligatoridae), the gharial and false gharial (family Gavialidae), and every one other living and fossil Crocodylomorpha.
Crocodile, (order Crocodylia, or Crocodilia), any of 23 species of generally large, ponderous, amphibious animals of lizard-like appearance and carnivorous habit belonging to the reptile Crocodylia . Crocodiles have powerful jaws with many conical teeth and short legs with clawed webbed toes.
They share a singular body form that permits the eyes, ears, and nostrils to be above the water surface while most of the animal is hidden below. The tail is long and large , and therefore the skin is thick and plated.
Crocodiles are a living link with the dinosaur-like reptiles of prehistoric times and are the closest living relatives of the birds. an outsized sort of crocodilian fossils are discovered that go back 200 million years to the Late Triassic Epoch. Fossil evidence also suggests that three major radiations occurred. just one of the four suborders of crocodiles has survived to times . The Crocodylia includes the “true crocodiles,” alligators, caimans, and gavials.
General Features (Facts About Crocodiles)
Size range and variety of structure
Crocodiles are the most important and therefore the heaviest of present-day reptiles. the most important representatives, the African crocodile (Crocodylus niloticus) of Africa and therefore the estuarine (or saltwater) crocodile (C. porosus) of Australia, attain lengths of up to six metres (20 feet) and weigh over 1,000 kg (about 2,200 pounds).
Some fossil forms (such as Deinosuchus and Sarcosuchus) may are between 10 and 12 metres (33 and 40 feet) long. as compared , the littlest species, the smooth-fronted caiman (Paleosuchus) and therefore the dwarf crocodile (Osteolaemus tetraspis), reach about 1.7 metres (about 6 feet) long as adults.
All crocodiles have a comparatively long snout, or muzzle, which varies considerably in shape and proportion. The scales that cover most of the body generally are arranged during a regular pattern, and thick, bony plates occur on the rear .
Families and genera are primarily distinguished by differences in skull anatomy. Species are identified principally by the proportions of the snout; by the bony structures on the dorsal, or upper, surface of the snout; and by the amount and therefore the arrangement of the scales.
Distribution and abundance (Facts About Crocodiles).
Crocodiles are found mainly within the lowland, humid tropics of the Northern and Southern hemispheres. The “true crocodiles” (family Crocodylidae) occur in most of Africa south of the Sahara, Madagascar, India, Sri Lanka, Southeast Asia , the Malay Archipelago , northern Australia, Mexico and Central America, the West Indies , and northern South America. within the Alligatoridae , most caimans are confined to the tropical areas of Central and South America, though the ranges of the broad-snouted caiman (Caiman latirostris) and Jacaré caiman (C. yacare) extend into temperate areas of South America.
The American alligator (Alligator mississippiensis) and therefore the Chinese alligator (A. sinensis) also occur in temperate regions. within the Gavialidae , the Indian gavial (Gavialis gangeticus) is found in Pakistan, northern India, Nepal, Bhutan, Bangladesh, and Myanmar.
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