Op zondag 11 september 2022 om 02:47:31 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
information: James Rawson et al, Early tetrapod cranial evolution is characterised by increased complexity, constraint and an offset from fin-limb evolution, Science Advances (2022). DOI: 10.1126/sciadv.adc8875. www.science.org/doi/10.1126/sciadv.
adc8875
Thanks!
Early tetrapod cranial evolution is characterized by increased complexity, constraint, and an offset from fin-limb evolution
James RG Rawson cs 2022
Science Advances 8, 36
doi 10.1126/sciadv.adc8875
The developmental underpinnings & functional consequences of modifications to the limbs during the origin of the tetrapod body-plan are increasingly well characterized,
but less is understood about the evolution of the tetrapod skull.
Decrease in skull-bone nr has been hypothesized to promote morphological & functional diversification in vertebrate clades,
but its impact during the initial rise of tetrapods is unknown.
Here, we test this by quantifying topological changes to cranial anatomy in fossil & living taxa bracketing the fin-to-limb transition, using anatomical network analysis.
We find:
bone loss across the origin of tetrapods is ass.x
- increased complexity of bone-to-bone contacts,
- decreasing topological diversity throughout the late Paleozoic, which may be related to developmental and/or mechanical constraints.
We also uncover a 10-My offset between fin-limb & cranial morphological evolution:
did different evolutionary drivers affect these features during the origin of tetrapods?
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