Amargasaurus -- Spikes or Sails?: YDAW Synapisode

  / 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:    • Amargasaurus: Your Dinosaurs Are Wron...  

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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:
https://twitter.com/PPaleoartist/stat...

Witton on the subeject of horn sheath plasticity:
https://markwitton-com.blogspot.com/2...

SVPOW has a photo of the knobs on Dicraeosaurus:
https://svpow.com/2008/12/21/shedload...

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.
https://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.
https://doi.org/10.1038/s41598-018-37...

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.
https://doi.org/10.1016/j.actbio.2016...

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
https://www.app.pan.pl/article/item/a...

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.
https://doi.org/10.1371/journal.pone....

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.
https://doi.org/10.1016/j.cretres.202...