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Thrinaxodon liorhinus

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description Thrinaxodon liorhinus Overview

Thrinaxodon liorhinus was a small cynodont synapsid from the Early Triassic, known principally from South Africa and Antarctica. Its skeleton combined reptile-like features with traits approaching those of mammals, including differentiated teeth and changes to the jaw and palate. Small pits and canals in the snout bones have been interpreted as possible evidence for sensitive facial whiskers, although soft tissues are not directly preserved.

help Thrinaxodon liorhinus FAQ

What kind of animal was Thrinaxodon liorhinus?

Thrinaxodon was a small cynodont synapsid, a member of the therapsid group often described as mammal-like reptiles. It lived during the Early Triassic and is considered an important transitional fossil between earlier reptile-like synapsids and true mammals.

Where have Thrinaxodon fossils been found?

Thrinaxodon fossils have been found principally in South Africa and Antarctica, both of which were part of the supercontinent Gondwana during the Early Triassic. The South African Karoo Basin in particular has produced well-preserved specimens.

What mammal-like features does Thrinaxodon show?

Thrinaxodon possessed differentiated teeth (incisors, canines, and postcanines), a partially developed secondary palate, and modifications to the jaw joint and skeletal structure. These features suggest it was an important evolutionary step toward the mammalian body plan.

When did Thrinaxodon live?

Thrinaxodon lived during the Early Triassic, roughly 250 to 245 million years ago, shortly after the Permian-Triassic mass extinction. This places it in the early recovery phase of terrestrial ecosystems following the largest known extinction event in Earth's history.

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