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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 ...
A number of features distinguish the plethodontids from other salamanders. Most significantly, they lack lungs, conducting respiration through their skin, and the tissues lining their mouths. [3] Some species of cave salamanders are neotenic, and keep their larval gills even as adults. Gills are absent in all other adult plethodontids. [13]
Specimen from the Pacific Lutheran University Natural History collection. Mudpuppies use rows of teeth to eat their prey. [5] Salamanders have three different sets of teeth: dentary, premaxillary, and vomerine teeth, which are named due to their location in the mouth. [14] All the teeth, despite their different locations, are very similar.
Amphiuma is a genus of aquatic salamanders from the United States, [2] the only extant genus within the family Amphiumidae / æ m f ɪ ˈ juː m ɪ d iː /. [3] They are colloquially known as amphiumas. [2]
External gills are the gills of an animal, most typically an amphibian, that are exposed to the environment, rather than set inside the pharynx and covered by gill slits, as they are in most fishes. Instead, the respiratory organs are set on a frill of stalks protruding from the sides of an animal's head. The axolotl has three pairs of external ...
The greater siren is the third longest salamander in the Western Hemisphere. [4] S. lacertina is paedomorphic, as are all sirens. They lack hindlimbs as well as a pelvic girdle, and have external gills all throughout their lives along with small lungs. They lack eyelids, and have an unfused pectoral girdle. [5]
Weller's salamander (Plethodon welleri) is a species of salamander in the family Plethodontidae. This species in endemic to the southeastern mountain range of the United States. This species in endemic to the southeastern mountain range of the United States.
Gyrinophilus, the spring salamanders, are a genus of salamanders in the family Plethodontidae. The genus is endemic to the Appalachian Mountains of the eastern United States and Canada. [ 2 ] Their habitat is under rocks in cold, clear springs, in wet caves, and in streams in forested areas.