Body size of Smilodon (Mammalia: Felidae)

  title={Body size of Smilodon (Mammalia: Felidae)},
  author={Per Christiansen and John M. Harris},
  journal={Journal of Morphology},
The body masses of the three large saber‐toothed machairodontines, Smilodon gracilis, S. fatalis, and S. populator, were estimated on the basis of 36 osteological variables from the appendicular skeleton of extant felids. A new model is introduced that takes the reliability of the predictor equations into account, since mass estimates are more reliable when computed from multiple variables per bone. At a body mass range of 55–100 kg, S. gracilis was comparable in size to extant jaguars, and S… 

Body mass estimation in Triassic cynodonts from Argentina based on limb variables

in from based on Body mass estimations for extinct taxa are fundamental in palaeobiological reconstructions, but little work has been done on this topic for non-mammaliaform cynodonts (NMC), the

Body Mass Estimation in Amphicyonid Carnivoran Mammals: A Multiple Regression Approach from the Skull and Skeleton

The body masses of sixteen species of amphicyonids (Mammalia, Carnivora, Amphicyonidae) from the New and Old World were estimated on the basis of 86 osteological variables measured from the

Body mass estimation in xenarthra: A predictive equation suitable for all quadrupedal terrestrial placentals?

Surprisingly, although obtained from ungulates and xenarthrans, these five selected equations were also able to predict the body mass of species from groups as different as rodents, carnivores, hyracoideans, or tubulidentates, suggesting the presence of a complex common allometric pattern for all quadrupedal placentals.


The postcranial remains of the saber-toothed cat Smilodon populator dealt with here corresponds to the first occurrence of the taxon in the State of São Paulo, filling a gap in its geographical

An extremely large saber-tooth cat skull from Uruguay (late Pleistocene–early Holocene, Dolores Formation): body size and paleobiological implications

Abstract Among the three recognized species of Smilodon, S. populator is the largest in size and has the widest distribution across South America. The present contribution describes an almost

Occurrence of the sabretooth cat Smilodon populator (Felidae, Machairodontinae) in the Cuvieri cave, eastern Brazil

A specimen found in the Cuvieri Cave in Brazil based on small bones (calcaneal, ectocuneiform, and phalanges) is described and commented here and is comparable in size to that of an adult lioness and represented the largest predator in the region.

Evidence for unusual size dimorphism in a fossil ailurid

A second nearly complete skeleton of the fossil ailurid Pristinailurus bristoli was recently recovered from the Hemphillian (late Miocene) Gray Fossil Site of northeast Tennessee. It appears to be

Body mass estimation for †Cyonasua (Procyonidae, Carnivora) and related taxa based on postcranial skeleton

The body mass of †Cyonasua would have been at least twice as high as the mean of the extant procyonid Procyon cancrivorus, indicating that it was probably able to fend off predators and quite capable of climbing slowly on thick-enough branches.



Body size in proboscideans, with notes on elephant metabolism

Both the basal and the field metabolic rates of extant elephants are lower than predicted for a hypothetical mammal, in accordance with their body size and subsistence on low-quality foods.

Body mass in large extant and extinct carnivores

Two of the extinct carnivores (Smilodon fatalis and Panthera atrox) are estimated to be as much as one and a half times heavier than previously thought.

Adaptive differences in the body proportions of large felids.

  • W. Gonyea
  • Environmental Science
    Acta anatomica
  • 1976
The lion was found to have the body proportions of a forest felid, yet it also resides in low structured habitats and it is postulated that the utilization of large prey by the lion limits the possibilities for morphological adaptations for speed.

What size were Arctodus simus and Ursus spelaeus (Carnivora: Ursidae)?

Body masses of the giant short-faced bear and the cave bear were calculated with equations based on a long-bone dimensions:body mass proportion ratio ratio in extant carnivores, finding that large Arctodus specimens considerably exceeded even the largest extant ursids in mass.

Allometry and Biomechanics: Limb Bones in Adult Ungulates

Power-law equations of the type y = mxb (allometric equations) were used to compare a parameter y, such as brain weight, to another parameter x, often body weight, in individuals representing species of different size within a phyletic group and produced consistent empirical descriptions of the effects of growth and body size differences in adults.

Differential scaling of the long bones in the terrestrial carnivora and other mammals

The capacity to compensate for size increases through alteration of limb posture is limited in extremely large‐sized mammals, such that radical changes in bone shape are required to maintain similar levels of peak bone stress.

Behavioral implications of saber-toothed felid morphology

  • W. Gonyea
  • Environmental Science
  • 1976
It is postulated that saber-toothed felids used their claw equipped forelimbs to grasp and hold their prey as do modern felids and it is thought that Smilodon, like the modern lion, adapted to open habitats by forming prides.

Relationships between North and South American Smilodon

ABSTRACT Middle and Late Pleistocene representatives of the genus Smilodon in South and North America are here assigned to different species. The South American S. populator, which existed east of

Locomotor behaviour in Plio-Pleistocene sabre-tooth cats: a biomechanical analysis

The locomotor behaviour of some large extinct carnivores, including several species of Plio-Pleistocene sabre-tooth cats, is here reconstructed, based on a comparison of the cross-sectional geometric

Canine tooth strength and killing behaviour in large carnivores

The canines of sabretooth cats are shown to be more similar in shape and strength characteristics to those of living canids than felids, whereas those of the borophagine dogs and the dire wolf are closer to modern hyaenas.