![]() The largest known marsupial, and the largest metatherian, is the extinct Diprotodon, about 3 m (9.8 ft) long, standing 2 m (6 ft 7 in) tall and weighing up to 2,786 kg (6,142 lb).Its skull could reached over 10 centimetres (3.9 in) in length and a weight of complete animal was 5.2 kilograms (11 lb). Stagodontid mammal Didelphodon was one of the largest Mesozoic metatherians and all Cretaceous mammals.Australohyaena is another large metatherian, weighing up to 70 kilograms (150 lb). Proborhyaenid Proborhyaena gigantea is estimated to weigh over 50 kg (110 lb) and possibly reached 150 kg (330 lb). The largest non-marsupial metatherian was Thylacosmilus, weigh 80 to 120 kilograms (180 to 260 lb), one estimate suggesting even 150 kg (330 lb).The largest known docodont was Castorocauda, almost 50 cm (20 in) in length.It is known by a right lower molariform 3.3 mm (0.13 in) in length, which is bigger than molariforms of all other morganucodontans. Paceyodon davidi was the largest of morganucodontans, cynodonts close to mammals.The largest known non-mammalian cynodont is Scalenodontoides, a traversodontid, which had a maximum skull length of approximately 61.7 centimetres (24.3 in) based on a fragmentary specimen.The largest of therocephalians is Scymnosaurus, which reached a size of the modern hyena. Other large gorgonopsians include Dinogorgon with skull of ~40 cm (16 in) long, Leontosaurus with skull of almost 40 cm (16 in) long, and Sycosaurus with skull of ~38 cm (15 in) long. Rubidgea atrox is the largest African gorgonopsian, with skull of nearly 45 cm (18 in) long. Inostrancevia latifrons is the largest known gorgonopsian, with a skull length of more than 60 cm (24 in), a total length approaching 3.5 m (11 ft) and a mass of 300 kg (660 lb).
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