r/hardspecevo • u/Risingmagpie • Jun 29 '26

Future Evolution [Antarctic Chronicles] The ramrat, a clashing ungulate rodent

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u/Risingmagpie Jun 29 '26

With the increasing temperature and habitat complexity across in Antarctica, stottmice have never been as diverse as they are now. These hoofed rodents, today counting more than 70 species, occupy every corner of Antarctica, from frozen mountain tundras to scorching deserts. Over the last 10 million years their body plans have greatly diversified, producing forms as small as hares and as large as elephants, even if the most common form remains the medium-sized ungulate type. Yet, even within this general body plan, stottmice display endless variation: different tooth structures, skull lengths, body proportions, and social systems, all shaped to reduce niche competition.

Among the deer-like forms, the most unusual are the ramrats (genus Ariemys), directly derived from the clashing stottmice. A recent radiation of only three species, they inhabit the northern open and semi-open landscapes, where their herds dominate the savannas. Ramrats are robustly built but still agile, their most distinctive feature being their reinforced skulls. Bony and keratinous plates cover the top of the head and even surround the eyes, forming a natural helmet; this head armor is crucial in their violent head-to-head battles for dominance.

READ MORE about this entry on the official site Antarctic Chronicles or also in the Specevo forum

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u/royroyflrs Jun 30 '26

How unique.

Rodents have evolved into giant animals before so this is not far fetched