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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.
Eoraptor (/ ˈ iː oʊ ˌ r æ p t ər /) is a genus of small, lightly built, basal sauropodomorph dinosaur.One of the earliest-known dinosaurs and one of the earliest sauropodomorphs, it lived approximately 231 to 228 million years ago, [1] during the Late Triassic in Western Gondwana, in the region that is now northwestern Argentina.
"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.
[10] [11] Earlier in 2011, Pradhania, a sauropodomorph from India, was tested for the first time in a large cladistic analysis and was found to be a relatively basal massospondylid. [12] Mussaurus and Xixiposaurus may also be included within Massospondylidae. [13]
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.
Has been variously classified as a sauropodomorph, [250] a theropod, [251] and a basal saurischian; [252] the most recent analyses repeatedly suggest it is an early sauropodomorph [253] Holotype specimen on display in San Juan, Argentina: Epachthosaurus sciuttoi: Holotype: MACN-CH 1317. Paratype: MACN-CH 18689 [254]
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.
Size compared to a human. Ahvaytum is a small sauropodomorph, estimated to be 3 feet (0.91 m) long and 1 foot (0.30 m) tall. [1] Eoraptor, a close relative from Argentina, is known from a larger and more complete skeleton with a total body length of around 1.3 metres (4.3 ft). [5]