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Eurycea longicauda, commonly known as the long-tailed salamander [5] or longtail salamander, [6] is a species of lungless salamander native to the Appalachian Region of the eastern United States. It is a " cave salamander " that frequents twilight zones of caves and also inhabits springs and surrounding forest.
The four-toed salamander can be easily mistaken for the redback salamander (Plethodon cinereus) in the wild. The redback salamander's underbelly has more numerous black markings. Unlike the four-toed salamander, the redback salamander has no constriction at the tail base, and its posterior limbs show five digits. [3]: 241–242
The cave salamander is a relatively large lungless salamander, ranging in total length from 10 to 20 cm (4 to 8 in). The tail makes up a significant proportion of the total length, up to 60–65%. [4] Post-metamorphic individuals have orange to reddish orange backs and a pale, unmarked ventral surface.
An adult salamander generally resembles a small lizard, having a basal tetrapod body form with a cylindrical trunk, four limbs, and a long tail. Except in the family Salamandridae, the head, body, and tail have a number of vertical depressions in the surface which run from the mid-dorsal region to the ventral area and are known as costal grooves .
Pygmy salamanders are typically light brown with dark brown pigment on the dorsal side forming an inverted V-shape marking down the back This ‘V’ shape marking is a classic pigmentation marking. The salamander's color can range from brick red to yellow but usually is found as a light brown shade.
The northern slimy salamander is typically an overall black in color, with numerous silvery spots or gold spots across its back. It is usually 12–17 cm (4.7–6.7 in) in total length (including tail), but can grow to 20.6 cm (8.1 in). [4] Males are not easily distinguished from females, though females tend to be slightly larger.
The northern two-lined salamander is a small salamander, with adults ranging from 65–120 mm in total length. [4] This salamander is yellow or yellowish-brown, with two black stripes running down the back which tends to break up after the base of the tail. The flanks are mottled grayish or brown. [5] The belly is pale yellowish, nearly ...
The hellbender (Cryptobranchus alleganiensis), also known as the hellbender salamander, is a species of aquatic giant salamander endemic to the eastern and central United States. It is the largest salamander in North America. A member of the family Cryptobranchidae, the hellbender is the only extant member of the genus Cryptobranchus.