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Sauropodomorpha (/ ˌ s ɔːr ə ˌ p ɒ d ə ˈ m ɔːr f ə / [3] SOR-ə-POD-ə-MOR-fə; from Greek, meaning "lizard-footed forms") is an extinct clade of long-necked, herbivorous, saurischian dinosaurs that includes the sauropods and their ancestral relatives.
Some analyses have found it to be a basal theropod, [3] [12] while others consider it a basal sauropodomorph. [ 5 ] [ 6 ] Other members of "Guaibasauridae" (such as Saturnalia ) are generally considered to be very basal sauropodomorphs, and may or may not form a clade with Guaibasaurus .
Because of this, according to Bonaparte, they are most likely either a very basal group on the stem leading toward sauropodomorphs or a group ancestral to both sauropodomorphs and theropods. Furthermore, the authors interpret this as evidence that the common ancestor of both saurischian lineages was more theropod-like than prosauropod-like.
Name Age Location Description Aganane Formation [1]. Pliensbachian Morocco [1] Up to 1350 tracks, most of them currently undescribed. Includes several new Sauropod morphotypes.
Plateosaurus is a basal (early) sauropodomorph dinosaur, a so-called "prosauropod". The type species is Plateosaurus trossingensis ; before 2019, that honor was given to Plateosaurus engelhardti , but it was ruled as undiagnostic (i.e. indistinguishable from other dinosaurs) by the ICZN .
"Big Momma" includes a nearly complete skull and large parts of an articulated skeleton. As of 2019, it is the largest and most complete Massospondylus specimen and probably the most complete basal sauropodomorph specimen discovered in Africa. Since 1990, it is on public exhibit in the Evolutionary Studies Institute in Johannesburg.
Eucnemesaurus (/ j uː k ˌ n iː m ɪ ˈ s ɔːr ə s /; meaning "good tibia lizard", for its robust tibiae) is a basal sauropodomorph dinosaur genus usually considered to be a synonym of Euskelosaurus. Recent study by Yates (2006), however, indicates that it is valid and the same animal as putative "giant herrerasaurid" Aliwalia.
Antetonitrus is a genus of sauropodiform dinosaur found in the Early Jurassic Elliot Formation of South Africa.The only species is Antetonitrus ingenipes.Sometimes considered a basal sauropod, it is crucial for the understanding of the origin and early evolution of this group.