Did Triadobatrachus Jump? Morphology and Evolution of the Anuran Forelimb in Relation to Locomotion in Early Salientians

摘要: Abstract The Lower Triassic amphibians Triadobatrachus massinoti and Czatkobatrachus polonicus are universally regarded as stem anurans. However, there is still uncertainty about whether or not they were capable of jumping like true anurans their postcranial features have so far provided only equivocal evidence. Although previous work has concentrated on the anatomy hind limb, here we examine forelimb, comparing crown-group to other amphibians. forelimb pectoral girdle share several with modern frogs, including a frog-like deltoid attachment scapula. Though radius ulna unfused, humerus similar those deltopectoral crest slightly elongated lateral deflection ventral edge creates concavity face humerus. These uncommon in most tetrapod groups characterized by sprawling stance but typical anurans, ...