Dissorophoidea
Dissorophoidea is a clade of medium-sized, temnospondyl amphibians that appeared during the Moscovian in Euramerica, and continued through to the Late Permian and the Early Triassic of Gondwana. They are distinguished by various details of the skull, and many species seem to have been well adapted for life on land.
Dissorophoid diversity was highest in the Permian; some of the more diverse families within the group include Dissorophidae, Trematopidae, and Branchiosauridae. The small Permo-Carboniferous Micromelerpetontidae are another example of neotenic dissorophoids. Many small dissorophoids with short rounded skulls were historically known as "amphibamids"; in 2018, the name Amphibamiformes was erected for a clade equivalent to the broad historical definition of "Amphibamidae".
Since 2008, a consensus of early amphibian researchers consider Lissamphibia to be part of this clade. There is a large degree of similarity between lissamphibians and certain Early Permian amphibamiforms, such as Gerobatrachus and Doleserpeton. A few authors still dispute affinities between dissorophoids and lissamphibians.
Taxonomy
- †Micromelerpetontidae
- Xerodromes
- * †Olsoniformes
- ** †Dissorophidae
- ** †Trematopidae
- * Amphibamiformes
- ** †Amphibamidae
- ** †Branchiosauridae
- ** †Micropholidae
- ** †Eoscopus
- ** †Georgenthalia
- ** †Gerobatrachus
- ** †Nanobamus
- ** †Platyrhinops
- ** †Plemmyradytes
- ** †Rubeostratilia
- ** Lissamphibia
- *** †Allocaudata / †Albanerpetontidae
- *** Gymnophiona
- *** Batrachia
- **** Salientia
- **** Caudata
Phylogeny