Convergences in Scapula Morphology among Small Cursorial Mammals: An Osteological Correlate for Locomotory Specialization

@article{Seckel2008ConvergencesIS,
  title={Convergences in Scapula Morphology among Small Cursorial Mammals: An Osteological Correlate for Locomotory Specialization},
  author={Lauren Seckel and Christine M. Janis},
  journal={Journal of Mammalian Evolution},
  year={2008},
  volume={15},
  pages={261-279}
}
Small cursorial mammals, such as lagomorphs, elephant shrews, and the more cursorial caviomorph rodents, share both the similar locomotor gait of rapid half-bounding and a similar scapula anatomy of a long, slender, caudally projecting metacromion process. This scapular morphology is also present in some notoungulates (extinct endemic South American ungulates), in rabbit-like taxa such as Propachyruchos. In the rabbit Oryctolagus this elongated metacromion process serves to increase the moment… Expand
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References

SHOWING 1-10 OF 53 REFERENCES
Cranial specialization and locomotor habit in the lagomorpha
SYNOPSIS. The skull of modern leporid lagomorphs is structurally specialized to permit significant intracranial movement. This appears to be the first recorded instance of organized cranial kinesisExpand
Cretaceous multituberculate skeleton and the early evolution of the mammalian shoulder girdle
TLDR
A Cretaceous eucosmodont multituberculate mammal skeleton has been found in Mongolia with all of the bony elements of the shoulder girdle in place, and demonstrates a different forelimb stance, which appears to have evolved just once among the common ancestors of multitubculates and therians. Expand
Limb proportions and adaptations in caviomorph rodents (Rodentia: Caviomorpha)
TLDR
Morphometric and biomechanical studies were performed to test the relationship between adaptation and morphology of the bones of the proximal and middle limb segments in terrestrial caviomorph rodents and found a functional sequence which seems to reflect an increase in force and muscular development in middle segments of the fore limb. Expand
Limb posture and locomotion in the Virginia opossum (Didelphis marsupialis) and in other non‐cursorial mammals
TLDR
Walking movements in eight mammalian species were studied cineradiographically with particular attention given to limb posture and excursion relative to the parasagittal and horizontal planes. Expand
Ontogenetic allometry in the locomotor skeleton of specialized half-bounding mammals
TLDR
Small mammals may share strong developmental constraints that govern their relative growth rates, and it is likely that there are different selective pressures on juveniles and adults, but that these selective pressures may not be different between specialized and unspecialized runners during ontogeny. Expand
The functional anatomy of the shoulder in the Virginia opossum (Didelphis virginiana)
TLDR
Basic functional-anatomical data on the shoulder of a generalized, noncursorial therian is provided which bear on the interpretation of the structural evolution of the shoulder known from the fossil record of mammal-like reptiles and early mammals. Expand
LOCOMOTION AND GAITS OF THE NORTHERN BROWN BANDICOOT, ISOODON MACROURUS, (MARSUPALIA: PERAMELIDAE)
TLDR
Gait repertoires of the northern brown bandicoot, Isoodon macrourus, were studied over a wide range of locomotor speeds, finding that increases in speed were accompanied by increases in spinal extension, presumably leading to the extended suspensions. Expand
Torque patterns of the limbs of small therian mammals during locomotion on flat ground.
TLDR
In three species of small therian mammals the net joint forces and torques acting during stance phase in the four kinematically relevant joints of the forelimbs and the hindlimbs were determined by inverse dynamic analysis. Expand
Functional specialisation of the pelvic limb of the hare (Lepus europeus)
TLDR
The pelvic limb of the hare was found to contain substantial amounts of hip extensor and adductor/abductor muscle volume, which is likely to be required for power production and stability during rapid turning. Expand
Biomechanical Scaling of Limb Bones and Differential Limb Use in Caviomorph Rodents
TLDR
Cross-sectional geometric properties associated with the amount of cortical bone in a section and mean bending and torsional rigidity were estimated for selected locations on femoral and humeral diaphyses of caviomorph rodents to detect more subtle differences in patterns of limb use. Expand
...
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2
3
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5
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