Рет қаралды 65,150
www.patreon.com/YDAW -- Researchers took a close look at the structure of Amargasaurus' neck spines, and concluded that the recent spiky restoration is not as reasonable as sail(s). Let's talk about this!
Previous Amargasaurus episode here: kzbin.info/www/bejne/hoO7h3yHpNiFoa8
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Contents:
0:00 New work on the neck spines
1:40 Correlates
4:20 (Re)modeling
7:45 Ligaments between spines
10:30 Might sails be better?
13:40 Conclusion
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Sources & Links:
That inflatable structures artwork:
PPaleoartist/status/1512048821416902658?s=20&t=VcKq7Ufmkf3oivkbl8Qb8Q
Witton on the subeject of horn sheath plasticity:
markwitton-com.blogspot.com/2017/11/can-we-predict-horn-shapes-of-fossil.html
SVPOW has a photo of the knobs on Dicraeosaurus:
svpow.com/2008/12/21/shedloads-of-awesome-part-3-dicraeosaurus/
Cerda, I. A., Novas, F. E., Carballido, J. L., & Salgado, L.
(2022)
Osteohistology of the hyperelongate hemispinous processes of Amargasaurus cazaui (Dinosauria: Sauropoda): Implications for soft tissue reconstruction and functional significance.
Journal of Anatomy 00: 1-15.
www.doi.org/10.1111/joa.13659
Gallina, P. A., Apesteguía, S., Canale, J. I., & Haluza, A.
(2019)
A new long-spined dinosaur from Patagonia sheds light on sauropod defense system.
Scientific Reports, 9 (1392), 1-10.
doi.org/10.1038/s41598-018-37943-3
Johnson, K. L., Trim, M. W., Francis, D. K., Whittington, W. R., Miller, J. A., Bennett, C. E., & Horstemeyer, M. F.
(2017)
Moisture, anisotropy, stress state, and strain rate effects on bighorn sheep horn keratin mechanical properties.
Acta Biomaterialia, 48, 300-308.
doi.org/10.1016/j.actbio.2016.10.033
Schwarz, D., Frey, E., & Meyer, C. A.
(2007)
Pneumaticity and soft-tissue reconstructions in the neck of diplodocid and dicraeosaurid sauropods.
Acta Palaeontologica Polonica 52 (1), 2007: 167-188
www.app.pan.pl/article/item/app52-167.html
Wilson, J. P., Woodruff, D. C., Gardner, J. D., Flora, H. M., Horner, J. R., & Organ, C. L.
(2016)
Vertebral Adaptations to Large Body Size in Theropod Dinosaurs.
PLOS ONE, 11(7), e0158962.
doi.org/10.1371/journal.pone.0158962
Windholz, G. J., & Cerda, I. A.
(2021)
Paleohistology of two dicraeosaurid dinosaurs (Sauropoda; Diplodocoidea) from La Amarga Formation (Barremian-Aptian, Lower Cretaceous), Neuquén Basin, Argentina: Paleobiological implications.
Cretaceous Research, 128, 104965.
doi.org/10.1016/j.cretres.2021.104965