Anaschisma
Encyclopedia
Anaschisma is a poorly known genus
of prehistoric amphibian
, from the Late Triassic
(Carnian
age) of the American Southwest, first described from the Popo Agie Formation
of Wyoming. In one early cladistic analysis it appears as an advanced or highly derived form. Some specimens attributed to Anaschisma sp. belong to Apachesaurus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of prehistoric amphibian
Amphibian
Amphibians , are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders. They are characterized as non-amniote ectothermic tetrapods...
, from the Late Triassic
Triassic
The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...
(Carnian
Carnian
The Carnian is the lowermost stage of the Upper Triassic series . It lasted from about 228.7 till 216.5 million years ago . The Carnian is preceded by the Ladinian and is followed by the Norian...
age) of the American Southwest, first described from the Popo Agie Formation
Popo Agie Formation
The Popo Agie Formation is a Mesozoic geologic formation. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.-See also:* List of dinosaur-bearing rock formations...
of Wyoming. In one early cladistic analysis it appears as an advanced or highly derived form. Some specimens attributed to Anaschisma sp. belong to Apachesaurus
Apachesaurus
Apachesaurus is an extinct genus of temnospondyl amphibian.-References:*Branson, E.B., and M.G. Mehl, 1929. Triassic amphibians from the Rocky Mountain region. University of Missouri Studies 4:155-239....