Dicynodonts

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Dicynodontia is an extinct clade of anomodont therapsids. Dicynodonts were herbivorous animals with a pair of tusks, hence their name, which means 'two dog tooth'. Members of the group possessed a horny beak. Dicynonts first appeared during the mid-Permian, and became dominant in the Late Permian, survived the Permian Extinction that wiped out most other therapsids and continued on throughout the Triassic before dying out at the end of the period. They were the most successful and diverse of the non-mammalian therapsids, with over 70 genera known, varying from rat- to elephant-sized.

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Dicynodon 1.jpgDicynodon Endothiodon 1.jpgEndothiodon CollectA 88894 Lisowisia Bojani 3.jpgLisowicia
Lystrosaurus 1.jpgLystrosaurus Placerias 1.jpgPlacerias

Dicynodon

phylum Chordata Dicynodon is a genus of the dicynodont therapsids from the Late Permian. This synapsid was a toothless herbivore, except for two tusks, which give it its name. Its average length was 1.2 meters or 3.9 feet. Fossils have been found in South Africa and Tanzania

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order Therapsida
suborder Dicynodontia
family †Dicynodontidae
species Dicynodon sp.
fossil range Late Permian

Endothiodon

phylum Chordata Endothiodon is an extinct genus of dicynodont from the Late Permian era.

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order Therapsida
suborder Anomodontia
family Endothiodontidae
genus Endothiodon
fossil range Late Permian

Lisowisia

phylum Chordata Lisowicia is an extinct genus of giant dicynodont synapsid that lived in what is now Poland during the Late Triassic Period. Lisowicia is the largest known dicynodont, as well as the largest non-mammalian synapsid, and is estimated to have weighed between 5–6 tons, comparable in size to modern elephants. It was also one of the last dicynodonts, living shortly before their extinction at the end of the Triassic period.

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order Therapsida
suborder Dicynodontia
family †Stahleckeriidae
genus Lisowicia
species L. bojani
fossil range Late Triassic

Lystrosaurus

phylum Chordata Lystrosaurus lived around 250 million years ago in what is now Antarctica, India, and South Africa.

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order Therapsida
suborder Dicynodontia
family Lystrosauridae
species Lystrosaurus murrayi
fossil range Late Permian to Early Triassic

Placerias

phylum Chordata Placerias was one of the largest herbivores in the Late Triassic, measuring up to 3.5 metres (11 ft) long and weighing up to a ton (907 kilograms).

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order Therapsida
suborder Dicynodontia
family Stahleckeriidae
species Placerias gigas
fossil range Late Triassic