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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 ...
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.
[15] [16] The common mudpuppy never leaves its aquatic environment and therefore does not undergo morphogenesis; however, many salamanders do and develop differentiated teeth. [17] Aquatic salamander teeth are used to hinder escape of the prey from the salamander; they do not have a crushing function. [17] This aids the salamander when feeding.
Sirenidae, the sirens, are a family of neotenic aquatic salamanders. Family members have very small fore limbs and lack hind limbs altogether. [1] In one species, the skeleton in their fore limbs is made of only cartilage. In contrast to most other salamanders, they have external gills bunched together on the neck in both larval and adult
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 ...
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]
The western grotto salamander (Eurycea spelaea), also called the Ozark blind salamander and previously known as just the grotto salamander, is a species of salamander in the family Plethodontidae. It is endemic to the United States. [1] Its natural habitats are freshwater springs, inland karsts, and caves.
Garden slender salamander: Batrachoseps major: Camp, 1915: northern Baja California in Mexico and Southern California, United States Lesser slender salamander: Batrachoseps minor: Jockusch, Yanev & Wake, 1998: San Luis Obispo County, California Black-bellied slender salamander: Batrachoseps nigriventris: Cope, 1869: California Pacific slender ...