It has a full head-to-butt mane because that seems to be a feature of most Hyaenids from looking at aardwolves, brown hyenas and striped hyenas.

Timelapse!

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Eomakhaira molossus - a new taxon which clarifies the origin of the Thylacosmilus and demonstrates its relation to Proborhyaenids.
https://t.co/8BLMkWCcYw

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A pair of Adinotherium ovinum chilling in the sun, on the lookout for any Phorusrhacos or borhyaenids in the distance

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Earliest were different from modern, huge bone-crackers like Crocuta. Protictitherium, from the Miocene of Batallones, was no larger than a jackal and had a varied diet including carrion. From fossils to sketches to full reconstruction

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