snapping turtle

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Related to alligator snapping turtle: common snapping turtle

snapping turtle,

large, aggressive New World freshwater turtleturtle,
a reptile of the order Chelonia, with strong, beaked, toothless jaws and, usually, an armorlike shell. The shell normally consists of bony plates overlaid with horny shields.
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. The two snapping turtle species are the sole members of the family Chelydridae. Snapping turtles prefer quiet, muddy water. They spend most of their time submerged, surfacing periodically to breathe. They feed on fish and other aquatic animals as well as on vegetation and decaying matter; they are valuable scavengers. They have long necks, powerful jaws, and fierce dispositions, lunging at aggressors and biting them. Snapping turtles lay their eggs in the ground in early summer, often at some distance from water. The eggs, about 20 in a clutch, hatch after a 10-week incubation, and the young find their way to water.

The common snapping turtle, or snapper (Chelydra serpentina), is found from SE and S central Canada to NE South America. The adult is often over 18 in. (45 cm) long and weighs over 30 lb (14 kg); some specimens weigh twice as much. The alligator snapper (Macrochelys temmincki) is found in the SE United States and the Mississippi valley. One of the world's largest turtles, it may reach a length of 30 in. (75 cm) and weigh 200 lb (90 kg). It has a muscular, wormlike projection on the tongue, which it uses as a fishing lure as it lies concealed in the mud of a river bottom. In Japan and Europe, where snapping turtles were imported as pets, the turtles have found in the wild and are invasive species.

Snapping turtles are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Reptilia, order Chelonia, family Chelydridae.

References in periodicals archive ?
Alligator snapping turtle (Macroclemys temminckii) surveys in Louisiana 19962001.
Trapping survey results for the alligator snapping turtle (Macrochelys temminckii) in southeastern Louisiana, with comments on exploitation.
The alligator snapping turtle, North America's largest freshwater turtle, can weigh over 80kg and live to 160 years old.
Temperature effects during early life stages of the alligator snapping turtle (Macrochelys temminckii).
Alligator snapping turtles are native to the southern United States with their favourite haunt being the Mississippi River.
The exhibit now includes 44 sharks, 12 southern stingrays, five endangered sea turtles, many exotic species of sea dragons, 13 moray eels and other uncommon animals like the alligator snapping turtle, colossal alligator gar, giant Pacific octopus, puffer fish and much more.
Basking in the Alligator Snapping Turtle, Macrochelys temminckii (Testudines: Chelydridae).
But there were also some sightings of rarer species including water voles, otters and bats, even some seals and a massive North American alligator snapping turtle.
Of the three factors, only the presence of alligator snapping turtles is not met at Spring Lake.
include Calypso, a giant loggerhead sea turtle, Kemp's Ridley sea turtles, box turtles, soft-shell varieties, red and yellow bellied species, spiny turtles, red-eared sliders and alligator snapping turtles.
There is no information about the ability of such larvae to enter hard-expansible eggs, such as those of alligator snapping turtles (Macrochelys temminckii; Ewert, 1979).