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Crocodiles (family Crocodylidae) or true crocodiles are large, semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.The term “crocodile” is sometimes used more loosely to include all extant members of the order Crocodilia, which includes the alligators and caimans (both members of the family Alligatoridae), the gharial and false gharial (both ...
In biology, taxonomic rank (which some authors prefer to call nomenclatural rank [1] because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a taxon) in a hierarchy that reflects evolutionary
Crocodylus palustris, mugger, marsh or Indian crocodile Crocodylus porosus , Saltwater crocodile or Estuarine crocodile Crocodylus raninus , Borneo crocodile , is currently considered to be a synonym of Crocodylus porosus ; whether or not it is a distinct species remains unclear.
Three extant crocodilian species clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus) Crocodilia is an order of mostly large, predatory , semiaquatic reptiles , which includes true crocodiles , the alligators , and caimans ; as well as the gharial ...
Alligators and caimans are the noisiest, while some crocodile species are almost completely silent. In some crocodile species, individuals "roar" at others when they get too close. The American alligator is exceptionally noisy; it emits a series of up to seven throaty bellows, each a couple of seconds long, at ten second intervals.
A crocodile shot in Odisha, India, [188] was claimed to measure 7.6 m (24 ft 11 in) in life, but its skull, when given scholarly examination, was thought to have come from a crocodile of a length no greater than 7 m (23 ft 0 in). [189] A reported 7.6 m (24 ft 11 in) crocodile was killed in the Hooghly River in the Alipore District of Calcutta ...
Researchers describe the new species as having "large" eyes and "v"-shaped teeth, according to a new peer-reviewed study
As a crown group, Crocodylidae only includes the last common ancestor of all extant (living) crocodiles and their descendants (living or extinct), whereas Crocodyloidea, as a stem group, also includes more basal extinct crocodile ancestors that are more closely related to living crocodiles than to alligators or gavialids.