a-urciuoli.bsky.social
@a-urciuoli.bsky.social
2/2 Use synchrotron CT & join me in unravelling the biomechanics of the organ of hearing! MSc in biomechanics, (paleo)anthropology, auditory physiology reqr. Find more details in the call! Deadline: Apr 20, 2025. #PhD #Palaeontology #Evolution #Zurich
March 20, 2025 at 6:55 PM
5/ Our results mix the cards of evolution once again and forces us to rethink the evolutionary processes that allowed the fixation of the very characteristic Neanderthal morphology!

Read more about this in our open access research paper!

www.nature.com/articles/s41...
Semicircular canals shed light on bottleneck events in the evolution of the Neanderthal clade - Nature Communications
In some structures, morphological phenotypic disparity can reflect underlying genetic variation. Here, the authors apply deformation-based geometric morphometrics to the Neanderthal clade bony labyrin...
www.nature.com
February 20, 2025 at 5:44 PM
4/ When comparing the morphological variation of late Neanderthals with that of Krapina (~120.000 years ago, Croatia) and Sima de los Huesos (~430.000 years ago, Spain) individuals, we expected that these populations (confined in time and space) would be much less variable. Surprise, they were not!
February 20, 2025 at 5:40 PM
3/ The results for late Nanderthals sparked our curiosity to look back in time (>150.000 years ago), closer to othe origin of Neanderthals. Such old DNA is very difficult to obtain, which makes it diffcult to check whether it was a genetic bottleneck that initiated the Neanderthal speciation event.
February 20, 2025 at 5:37 PM
2/ Thanks to ancient DNA analyses, we knew that late Neanderthals (those that can be most clearly identified as belonging the species) are not very genetically variable. Interestingly, our results detect them as very poorly variable in their semicircular canal shape!
February 20, 2025 at 5:29 PM
1/ Did you know that the shape of the semicircular canals has a strong phylogenetic signal and that it can be used to assess genetic distances among species? This is why used it as a proxy to assess the variation of the Neanderthal clade at different times and evolutionary stages!
February 20, 2025 at 5:25 PM