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Crocodile ISOs may also assist in detection of local salinity, or serve other chemosensory functions. [61] Less consistent differences: Crocodiles are generally thought of as more aggressive than alligators. [61] Only six of the 23 crocodilian species are considered dangerous to adult human beings, most notably the Nile crocodile and saltwater ...
The American crocodile is also one of the largest crocodile species, with large males in the southern part of their range reported to approach 6.1 m (20 ft) in size. Based on projections from various skulls, the largest males may have reached 6–7 m (20–23 ft) in length, and their predicted mass reached up to 1,283 kg (2,829 lb). [ 120 ]
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 and ...
American alligators are often less aggressive towards humans than larger crocodile species, a few of which (mainly the Nile and saltwater crocodiles) may prey on humans with some regularity. [ 26 ] [ 146 ] Alligator bites are serious injuries, due to the reptile's sheer bite force and risk of infection.
"Alligators are really dark brown to black in color whereas the crocodile will be more greenish-grey," Milbrandt said. "Some of the other distinguishing characteristics have to do with the shape ...
A. olseni fore limb Alligator prenasalis fossil. The superfamily Alligatoroidea includes all crocodilians (fossil and extant) that are more closely related to the American alligator than to either the Nile crocodile or the gharial. [1] This is a stem-based definition for alligators, and is more inclusive than the crown group Alligatoridae. [2]
Cladistically, it is defined as Crocodylus niloticus (the Nile crocodile) and all crocodylians more closely related to C. niloticus than to either Alligator mississippiensis (the American alligator) or Gavialis gangeticus (the gharial). [5] This is a stem-based definition for crocodiles, and is more inclusive than the crown group Crocodylidae. [3]
Caimaninae is cladistically defined as Caiman crocodylus (the spectacled caiman) and all species closer to it than to Alligator mississippiensis (the American alligator). [ 8 ] [ 9 ] This is a stem-based definition for caimaninae, and means that it includes more basal extinct caimanine ancestors that are more closely related to living caimans ...