Search results
Results from the WOW.Com Content Network
Plethodontidae, or lungless salamanders, are a family of salamanders. [ 1 ] [ 2 ] With over 500 species, lungless salamanders are by far the largest family of salamanders in terms of their diversity. Most species are native to the Western Hemisphere , from British Columbia to Brazil.
The external gills seen in salamanders differs greatly from that of amphibians with internalized gills. Unlike amphibians with internalized gills which typically rely on the changing of pressures within the buccal and pharyngeal cavities to ensure diffusion of oxygen onto the gill curtain, neotenic salamanders such as Necturus use specified ...
The northern two-lined salamander is a small salamander, with adults ranging from 65–120 mm in total length. [3] 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. [4] The belly is pale yellowish, nearly ...
The coastal giant salamander can reach up to 33 cm (13 in) in total length as a terrestrial adult, and 35.5 cm (14.0 in) in paedomorphic forms, [4] making it the largest terrestrial salamander in North America. [5] The coastal giant salamander has stout limbs with four toes on the front feet and five toes on the back feet.
Pacific giant salamanders are defined by their wide protruding eyes, costal grooves, thick arms, and dark background coloring. Dicamptodon have a snout-vent-length (SVL) of 350 mm (14 in), a broad head, laterally flexible flattened tails, paired premaxillae that are separate from the nasals, and the aquatic larvae have gills.
The red-backed salamander is a small terrestrial salamander, 5.7–10.0 cm (2.2–3.9 in) in total length (including tail), which usually lives in forested areas under rocks, logs, bark, and other debris. [4] It is one of the most numerous salamanders throughout its range. [4] As with all amphibians, the red-backed salamander has permeable skin.
Like in the majority of salamander species, there are four toes on the fore limbs and five on the hind limbs. They have paedomorphic traits, meaning their metamorphosis from the larval stage is incomplete, so they lack eyelids and the adults retain gill slits (open in the hellbender, closed in Andrias).
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.