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Abelisauridae (meaning "Abel's lizards") is a family (or clade) of ceratosaurian theropod dinosaurs.Abelisaurids thrived during the Cretaceous period, on the ancient southern supercontinent of Gondwana, and today their fossil remains are found on the modern continents of Africa and South America, as well as on the Indian subcontinent and the island of Madagascar.
Abelisaurus (/ ə ˌ b ɛ l ɪ ˈ s ɔː r ə s /; "Abel's lizard") is a genus of predatory abelisaurid theropod dinosaur alive during the Late Cretaceous Period of what is now South America. It was a bipedal carnivore that probably reached about 7.4 metres (24 ft 3 in) in length, although this is uncertain as it is known from only one partial ...
Koleken was found in outcrops of the La Colonia Formation, which dates to the Maastrichtian (Cretaceous)–Paleocene (Paleogene) boundary. [3] This formation is best known for fossils of the abelisaurid theropod Carnotaurus and the saltasauroid titanosaur Titanomachya, [1] [4] as well as fossils of other reptiles including the turtle Patagoniaemys, the snake Alamitophis and the plesiosaurs ...
Reconstruction Size compared to a human. Aucasaurus was a medium-sized abelisaur, measuring 5.5–6.2 m (18–20 ft) long and weighing approximately 700 kg (1,500 lb). [6] [7] [8] Its skull was not as short or as deep-snouted as that of Carnotaurus.
Global occurrences of Abelisauridae (white circles), Carcharodontosauridae (red lozenges), and Spinosauridae (blue triangles). From top to bottom: Late Jurassic, Early Cretaceous, and Late Cretaceous paleomaps. For the paleogeographic reconstructions and plotting the occurrences it was used the software Point Tracker [32]. Date: 2016: Source
Within the Abelisauridae, the genus is often considered a member of the Brachyrostra, a clade of short-snouted forms restricted to South America. Carnotaurus was a lightly built, bipedal predator, measuring 7.5 to 8 m (24.6 to 26.2 ft) in length and weighing 1.3–2.1 metric tons (1.4–2.3 short tons; 1.3–2.1 long tons).
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Before discovery, the oldest known abelisaurids were represented only by fragmentary remains from the late Early Cretaceous of South America and Africa and older records of abelisauroids in general were questionable. With the discovery of Eoabelisaurus, the temporal range of the clade was extended for more than 40 million years into the ...