Evolutionary allometry of the thoracolumbar centra in felids and bovids

Journal of Morphology
Katrina E Jones

Abstract

Mammals have evolved a remarkable range of body sizes, yet their overall body plan remains unaltered. One challenge of evolutionary biology is to understand the mechanisms by which this size diversity is achieved, and how the mechanical challenges associated with changing body size are overcome. Despite the importance of the axial skeleton in body support and locomotion, and much interest in the allometry of the appendicular skeleton, little is known about vertebral allometry outside primates. This study compares evolutionary allometry of the thoracolumbar centra in two families of quadrupedal running mammals: Felidae and Bovidae. I test the hypothesis that, as size increases, the thoracolumbar region will resist increasing loads by becoming a) craniocaudally shorter, and b) larger in cross-sectional area, particularly in the sagittal plane. Length, width, and height of the thoracolumbar centra of 23 felid and 34 bovid species were taken. Thoracic, prediaphragmatic, lumbar, and postdiaphragmatic lengths were calculated, and diameters were compared at three equivalent positions: the midthoracic, the diaphragmatic and the midlumbar vertebra. Allometric slopes were calculated using a reduced major axis regression, on both raw and ...Continue Reading

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Citations

Feb 18, 2017·Evolution & Development·Marcela Randau, Anjali Goswami
Mar 23, 2017·Evolution; International Journal of Organic Evolution·Patrick ArnoldMartin S Fischer
Nov 9, 2018·American Journal of Physical Anthropology·Liza J Shapiro, Addison D Kemp
Nov 14, 2019·Proceedings. Biological Sciences·Abby Vander Linden, Elizabeth R Dumont
Apr 15, 2016·Journal of Anatomy·Andrew R CuffJohn R Hutchinson
Jun 11, 2017·BMC Evolutionary Biology·Marcela Randau, Anjali Goswami
Nov 18, 2018·BMC Evolutionary Biology·Katrina E JonesStephanie E Pierce
Dec 15, 2020·Evolution; International Journal of Organic Evolution·Chris J Law
Mar 4, 2021·Current Biology : CB·Katrina E JonesStephanie E Pierce
May 1, 2021·BMC Biology·Eli Amson, Faysal Bibi

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