ⓘ Rachitomi

                                     

ⓘ Rachitomi

The Rachitomi were a group of extinct Palaeozoic labyrinthodont amphibians, according to an earlier classification system. They are defined by the structure of the vertebrae, having large semi-circular intercentra below the notochord and smaller paired though prominent pleurocentra on each side above and behind, forming anchoring points for the ribs.

This integrated form the backbone was found in some lobe-finned fish, Ichthyostegalia, most of the Temnospondyli and some Reptiliomorpha. Primitive reptiles kept complex rachitomous vertebrae, but with pleurocentra to be more dominant. As a phylogenetic unit, thus Rachitomi unit paraphyletic.

                                     
  • 1919 The structure, evolution and origin of the Amphibia. The orders Rachitomi and Stereospondyli Philosophical Transactions of the Royal Society B
  • the scientific literature is Rachitomi which was named by American paleontologist Edward Drinker Cope in 1882. Rachitomi was commonly used in the late
  • 1920 - 01 - 01 The Structure, Evolution and Origin of the Amphibia. The Orders Rachitomi and Stereospondyli Philosophical Transactions of the Royal Society B:
  • 1920 - 01 - 01 The Structure, Evolution and Origin of the Amphibia. The Orders Rachitomi and Stereospondyli Philosophical Transactions of the Royal Society B:
  • 1920 The Structure, Evolution and Origin of the Amphibia. The Orders Rachitomi and Stereospondyli. Philosophical Transactions of the Royal Society of
  • differentiated from several other newly named amphibian orders, such as Rachitomi by the presence of intercentra and pleurocentra of the same size and
  • consisting of a number of separate elements, were placed in the suborder Rachitomi and large Triassic aquatic forms with simpler vertebrae were placed in