Doleserpeton

Doleserpeton is an extinct, monospecific genus of dissorophoidean temnospondyl within the family Amphibamidae that lived during the Upper Permian, 285 million years ago.

[3] The genus name Doleserpeton is derived from the initial discovery site in Dolese quarry of Oklahoma and the Greek root "herp-", meaning "low or close to the ground".

[5] All fossil specimens were preserved in limestone blocks, which was treated with an acid wash to clear away excess debris and minimize damage during the excavation process.

The carpals, metacarpals, and digits of Doleserpeton were allowed for full mobility of its forelimbs and joints to travel on land while providing adequate support for its body mass and size.

The proximal end of the femur was enlarged to allow strong muscle attachment and also displayed well developed tarsals, metatarsals, and phalanges that served the same purposes for mobility and flexibility of joints in their hindlimbs.

The classification of the family Amphibamidae is based on three hypotheses regarding the origin of Lissamphibia, which conflict regarding the evolutionary position of Doleserpeton in relation to its primitive ancestors and descendants.

[10] The three hypotheses of Lissamphibia origin are: The most parsimonious tree showed that Doleserpeton is loosely classified as the sister group to the genus Amphimabus within the family Amphibamidae.

Character traits that support this phylogenetic classification include the following synapomorphies: bicuspid teeth, morphological similarities in larval stages, and separation between the crown and base of the tooth in its pedicellate dentition.

Like their modern amphibious relatives Lissamphibia, Doleserpeton may have had to rely on the availability of a nearby water source during reproduction and larval stages.

The skeletal elements from fossil evidence were well ossified, which supported the notion that Doleserpeton lived a primarily terrestrial life after metamorphosis.