Belongs within: Gnathostomata.Contains: Dipnomorpha, Tetrapodomorpha. The Sarcopterygii are a clade of vertebrates including the four-legged Tetrapoda together with those fishes (commonly known as ‘lobe-finned fishes’) more closely related to the tetrapods than to the ray-finned fishes of the Actinopterygii. Living members of this clade differ from most living Actinopterygii in having fleshy, limb-like bases to… Continue reading Sarcopterygii


Belongs within: Sarcopterygii.Contains: Dipnoi. The Dipnomorpha includes the lungfish and their fossil relatives, united by the presence of jointed radials in the pectoral fins. Members of this clade have a fossil record going back to the Early Devonian (Zhu & Yu 2002). Synapomorphies (from Zhu & Yu 2002): Anterior margin of parietal slightly posterior to… Continue reading Dipnomorpha