Pierre Orgebin
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pierreorgebin.bsky.social
Pierre Orgebin
@pierreorgebin.bsky.social
PhD student
Palaeontology 🦌🦬🦒
Martin Luther Universität Halle Wittenberg
Museum für Naturkunde Berlin
🧠🏝️
Each new fossil endocast helps us learn more about the intriguing phenomenon of island brain evolution! Huge thanks to all my coauthors and everyone who contributed to making this study possible! 🙏
7/7
September 3, 2025 at 8:28 AM
🏝️⚖️
Unlike M. balearicus, H. matthei underwent only a minor brain size reduction. Different islands = different evolutionary pathways!
6/7
September 3, 2025 at 8:28 AM
🕰️🐐
This means that its putative ancestor colonized Gargano much later than thought: not before the Early Miocene! The brain morphology of Hoplitomeryx definitively places it within Pecora, not primitive Tragulina as previously suspected.
5/7
September 3, 2025 at 8:28 AM
🖥️🔬
Using high-resolution CT scanning, we digitally reconstructed its brain from fossil skulls and compared it with 35 extant and extinct ruminants. 🚨 H. matthei had a "modern" bovid-like brain, not a more primitive brain structure as expected!
4/7
September 3, 2025 at 8:28 AM
🧬❓
H. matthei was truly bizarre: 5 horns, saber-like canines, and a debated phylogenetic position. Was it related to antelopes? Deer? Primitive ruminants? Its brain may hold crucial clues to solving this evolutionary puzzle...
3/7
September 3, 2025 at 8:28 AM
🐐🧠
We know that some Pleistocene island mammals, like Myotragus balearicus (the "mouse goat"), underwent pronounced brain size changes. But how widespread and ancient is this phenomenon? More data are needed to build a comprehensive picture across time and different island systems.
2/7
September 3, 2025 at 8:28 AM