Estimating Body Mass from the Astragalus in Mammals

@inproceedings{Tsubamoto2012EstimatingBM,
  title={Estimating Body Mass from the Astragalus in Mammals},
  author={Takehisa Tsubamoto},
  year={2012}
}
  • T. Tsubamoto
  • Published 2012
  • Environmental Science, Biology, Geography
Astragalar fossils have been intensively studied as an indicator of the functional morphology and phylogenetic relationships of mammals. However, relatively few studies have investigated the relationship between astragalar size and body mass, usually with a focus on a particular taxonomic group. Here, univariate and multiple regression models are used to analyze the relationship between astragalar size and body mass based on an extensive sample of extant land mammals (11 orders, 48 species, 80… 

Body mass estimation from the talus in primates and its application to the Pondaung fossil amphipithecid primates

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The study of postcranial bones, such as tarsals, allows for a better understanding of the ecology of these animals and deserves more interest in future morphological and phylogenetic studies.

Predicting euarchontan body mass: A comparison of tarsal and dental variables.

Evaluated prediction equations for inferring euarchontan body mass based on measurements of the articular facet areas of the astragalus and calcaneus reveal that predictions based on facet areas are more reliable than most linear dental or tarsal predictors.

Occipital condyle width (OCW) is a highly accurate predictor of body mass in therian mammals

Background Body mass estimation is of paramount importance for paleobiological studies, as body size influences numerous other biological parameters. In mammals, body mass has been traditionally

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  • Environmental Science
    Anthropological Science
  • 2019
The relationship between calcaneal size and body mass in extant primates and other land mammals is examined using regression analyses to provide simple equations for estimating the body mass of

Resizing the largest known extinct rodents (Caviomorpha: Dinomyidae, Neoepiblemidae) using occipital condyle width

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References

SHOWING 1-10 OF 72 REFERENCES

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

The astragalus of Paleogene artiodactyls: comparative morphology, variability and prediction of body mass

An allometric relationship between the dimensions of the astragalus and the body mass has been established for extant species, allowing estimates for the fossil species and the limits of this method are discussed.

Body Mass Estimates for Pondaung Primates

Among the Pondaung primates, Bahinia seemed to better fit to the prosimian model than to the anthropoid model, but the other genera did not fit particularly better to either of the models.

Body Mass Estimates for Eocene Eosimiid and Amphipithecid Primates Using Prosimian and Anthropoid Scaling Models

The anthropoid model gives smaller differences between upper- and lower-molar-based body mass estimates, but premolars are relatively much smaller in amphipithecids than in extant prosimians and anthropoids.

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.

Estimating the body size of eocene primates: A comparison of results from dental and postcranial variables

This work derives estimates for Eocene primates based on tarsal bone variables to compare with previously published values derived from dental measures, and compares the accuracy and precision of dental- and tartsal-based regression models for predicting weight in extant species.

HOW BIG IS A GIANT? THE IMPORTANCE OF METHOD IN ESTIMATING BODY SIZE OF EXTINCT MAMMALS

Examination of the influence of phylogenetic, biomechanical, and statistical assumptions on body size estimates for 2 species of fossil castorids found the Pleistocene “giant” beaver Castoroides and the fossorial Miocene beaver Palaeocastor to be similar to previously published estimates.

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.

Dinosaurs, dragons, and dwarfs: The evolution of maximal body size

The body mass of the top species was found to increase with increasing land area, with a slope similar to that of the relation between body mass and home range area, suggesting that maximum body size is determined by the number of home ranges that can fit into a given land area.

Niche structure and evolutionin creodont (Mammalia) faunas of the European and North American Eocene

  • M. Morlo
  • Environmental Science, Geography
  • 1999
...