Procera Explained

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 in 1998 and has been supported by few recent morphological and molecular studies.^[1]

Notes and References

1. Pyron . A. R. . Wiens . J. J. . 10.1016/j.ympev.2011.06.012 . A large-scale phylogeny of Amphibia including over 2800 species, and a revised classification of extant frogs, salamanders, and caecilians . Molecular Phylogenetics and Evolution . 61 . 2 . 543–583 . 2011 . 21723399. free .