Search results
Results from the WOW.Com Content Network
Genetic evidence and some anatomical details (such as pedicellate teeth) support the idea that frogs, salamanders, and caecilians (collectively known as lissamphibians) are each other's closest relatives. Frogs and salamanders show many similarities to dissorophoids, a group of extinct amphibians in the order Temnospondyli. Caecilians are more ...
Molecular studies of extant amphibians based on multiple-locus data favor one or the other of the monophyletic alternatives and indicate a Late Carboniferous date for the divergence of the lineage leading to caecilians from the one leading to frogs and salamanders, and an early Permian date for the separation of the frog and salamander groups.
[4] [5] A 2012 study of the stem-caecilian Eocaecilia found Gerobatrachus to group within Lissamphibia. In this phylogeny, Gerobatrachus is more closely related to frogs and salamanders than it is to caecilians, meaning that Gerobatrachus would have been a descendant of the last common ancestor of modern amphibians. [6]
Salamanders, caecilians and some frogs have one or two rows of teeth in both jaws, but some frogs (Rana spp.) lack teeth in the lower jaw, and toads (Bufo spp.) have no teeth. In many amphibians there are also vomerine teeth attached to a facial bone in the roof of the mouth.
Some salamander species are fully aquatic throughout their lives, some take to the water intermittently, and others are entirely terrestrial as adults. This group of amphibians is capable of regenerating lost limbs as well as other damaged parts of their bodies. Researchers hope to reverse engineer the regenerative processes for potential human ...
It belongs to a lineage believed to have given rise to the three living branches of amphibians - frogs, salamanders and limbless caecilians. While only the skull - measuring around 1.2 inches (3 ...
There are a wide range of frogs, salamanders and caecilians that can be kept in an aquarium. Some of these are not found in the pet trade. This is usually because they're either too big for most commercial aquariums (ex: giant salamanders), are endangered (ex: achoques), or both.
Procera is a hypothetical clade of amphibians that includes salamanders and caecilians but not frogs. A close relationship between salamanders and caecilians is a competing hypothesis to the more widely supported view that salamanders and frogs are each other's closest relatives within a clade called Batrachia. Procera was proposed as a clade ...