Observations on allometry in mammalian dentitions its interpretation and evolutionary significance. by Björn Kurtén

Cover of: Observations on allometry in mammalian dentitions | Björn Kurtén

Published in Helsingforsiae .

Written in English

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Subjects:

  • Teeth.

Edition Notes

Bibliography: p. 13.

Book details

SeriesActa zoologica Fennica,, 85
Classifications
LC ClassificationsQH7 .S78 vol. 85
The Physical Object
Pagination13 p.
Number of Pages13
ID Numbers
Open LibraryOL209788M
LC Control Numbera 55010017
OCLC/WorldCa9493501

Download Observations on allometry in mammalian dentitions

This is a special case of allometry s.l.; allometrythe presence of a graclient, will always result in cliffer­ ences in shape between teeth of unequal size.

The allometry concept was formulated by HUXLEY (). A large body of data has been sampled by the present author, mainly relating to the dentitions. Author(s): Kurtén,Björn Title(s): Observations on allometry in mammalian dentitions: its interpretation and evolutionary significance/ by Björn Kurtén.

Country of Publication: Finland Publisher: Helsingforsiae: [publisher not identified], Manufacturer: Helsingforsi: Tilgmanns Tryckeri, Description: 13 pages: illustrations.

Observations on allometry in mammalian dentitions; its. Abstract. Functional least squares regression was used to fit the allometric equation, y = bx k, to data on head‐body lengths and body weights for species of mammals. These measurements were found to be highly correlated and to scale isometrically.

The scaling of M1 area with head‐body length was investigated for species of terrestrial by: Observations on allometry in mammalian dentitions; its interpretation and evolutionary significance: Tekijä: Kurtén, Björn: Julkaisija: Societas pro fauna et flora Fennica: Päiväys: Kuuluu julkaisusarjaan: Acta zoologica Fennica; ISSN: URI: Avainsanat: biology zoology: Asiasanat (ysa): eläintiede biologia Cited by: In mammalian assemblages, size distributions reflect conditions of vegetation and climate as well as biotic interactions among mammals.

baseline for study of dental allometry. This model is. Observations on allometry in mammalian dentitions; its interpretation and evolutionary significance By Björn Kurtén Download PDF (3 MB). We discuss the problem of observation of natural similarity in skeletal evolution of terrestrial mammals.

Analysis is given by means of testing of the power scaling laws established in long-bone allometry, which describe development of bones (of length L and diameter D) with body mass in terms of the growth exponents, e.g., λ= d log L/ d log D. The book is intended to be accessible to upper-level undergraduate, and graduate students, but also of interest to senior scientists.

Its easy-to-read chapters and clear illustrations can be used. Allometry has been previously implicated as a driver of spatial scales of herbivore foraging (Wilmhurst et al. ; Laca ) due to constraints on rates of food intake imposed by body size. Observations on allometry in mammalian dentitions, (in Acta zoologica Fennica) Sex dimorphism and size trends in the cave bear, Ursus spelaeus Rosenmüller and Heinroth, (in Acta zoologica Fennica) On the longevity of mammalian species in.

The study of cranial variation has played an important role in primate systematics. Many different research strategies have been employed to investigate functional anatomy of the mammalian skull; but to fully understand the adaptive significance of cranial structure, it is necessary to consider cranial allometry, the relationship between the size and shape of the skull and body size.

Observations on the allometry in mammalian dentitions: its interpretation and evolutionary significance. Acta Zoologica Fennica 1 – Kurtén, B. Observations on allometry in mammalian dentitions (Societas pro fauna et flora Fennica ) On evolution and fossil mammals (Columbia University Press ) On the articulation between the thoracic tergites of some common trilobite forms (Societas scientiarum Fennica ) On the bears of the Holsteinian interglacial ().

Kurten B () Observations on allometry in mammalian dentitions: Its interpretation and evolutionary significance.

Acta Zool Fennica –13 Google Scholar Kurten B () Teeth: form, function, and evolution. In the mammalian lineage, the generally conical-shaped reptilian teeth became more complex, and mammalian dentition underwent remarkable morphological and functional diversification, showing great.

Structure of tooth: Each typical mammalian tooth is placed in the socket over the jaw bone. It is distinguished into three main pads.

1) Root - It is the basal part embedded in the bony socket. 2) Neck - it is the part above the root enclosed by the gum. The study of mammalian evolution depends greatly on understanding the evolution of teeth and the relationship of tooth shape to diet.

Links between gross. Ungar, P. Dental allometry in mammals: a retrospective. — Ann. Zool. Fennici – Kleiber suggested that mammalian metabolic rate scales with body mass at M b 3/4.

Bigger animals use relatively less energy. Gould reasoned that teeth should scale the same way given caloric need.

In many cases though, cheek tooth occlusal area. Zool., Lond.()Static allometry of mammalian teeth and the correlation of tooth size and body size in contemporary mammals G. KEN CREIGHTON Division of Mammals, Museum of Zoology, University of Michigan, Ann Arbor, MichiganU.S.A.

(Accepted 12 June ). Body size allometry of mammalian blood heat output. If the blood heat output values of various mammals are plotted against body mass, an allometric relationship results, similar to that seen for specific basal metabolic rates of the whole body (see Fig.

2(b)). Contains articles on Lepidoptera of Newfoundland, Genus Emberiza, Allometry in Mammalian Dentitions by Bjorn Kurten, and Ictitherium robustum by Bjorn Kurten,Acta Zoologica Fennica, Paperback – January 1, by Acta Zoologica : Acta Zoologica Fennica.

Allometry has been widely used to make interspecies pharmacokinetic predictions [4, 5]. Given that body composition tends to vary relatively little among mammalian species, it is expected that, as with muscle mass, the volume of distribution of a drug should vary in direct proportion to body weight (i.e., m = 1).

This reflects the fact that a. Although there is much data available on mammalian long-bone allometry, a theory explaining these data is still lacking. We show that bending and axial compression are the relevant loading modes and elucidate why the elastic similarity model failed to explain the experimental data.

Our analysis provides scaling relations connecting bone diameter and length to the axial and transverse. The Teeth of Non-Mammalian Vertebrates is the first comprehensive publication devoted to the teeth and dentitions of living fishes, amphibians and reptiles.

The book presents a comprehensive survey of the amazing variety of tooth forms among non-mammalian vertebrates, based on descriptions of approximately species belonging to about families.

Creighton, G. () Static allometry of mammalian teeth and the correlation of tooth size and body size in contemporary mammals. Journal of Zoology – Critchley, H. & Rolls, E. () Responses of primate taste cortex neurons to the astringent tastant tannic acid.

The Teeth of Non-Mammalian Vertebrates is the first comprehensive publication devoted to the teeth and dentitions of living fishes, amphibians and reptiles. The book presents a comprehensive survey of the amazing variety of tooth forms among non-mammalian vertebrates, based on descriptions of approximately species belonging to about   Economos () was the first to suggest that mammalian long-bone allometry cannot be explained by a single power law in the complete range of body divided mammals into two groups: small mammals (M 20 kg).A best fit for the head-and-body length exponent furnished l = for large mammals, a value close to the one predicted by elastic.

Observations on allometry in mammalian dentitions (Societas pro fauna et flora Fennica ) On evolution and fossil mammals (Columbia University Press ), kokoelma artikkeleita vuosilta –; On the articulation between the thoracic tergites of some common trilobite forms (Societas scientiarum Fennica ).

To fill this gap in knowledge and to resolve the existing controversies, we explored the variation of linear size variables (length and width) for all teeth from complete permanent dentitions of four pinniped species, two phocids (Histriophoca fasciata, Phoca largha) and two otariids (Callorhinus ursinus, Eumetopias jubatus).

Size variation among these teeth was mostly heterogeneous both along the. ALLOMETRY AND SIZE IN ONTOGENY AND PHYLOGENY ALLOMETRY AND SIZE IN ONTOGENY AND PHYLOGENY GOULD, STEPHEN JAY BY STEPHEN JAY GOULD Department of Geology, Columbia University, New York (Received I 5 December I ) CONTENTS I.

Introduction: the correlation of size and shape. Size-required allometry. (I) Area-to-volume. Mammalian teeth develop from oral ectoderm and neural crest derived mesenchyme.

is an evolutionary derived tooth exhibiting two rather special characteristics which are not commonly found in other mammalian dentitions. They grow continuously and their enamel is deposited asymmetrically. Observations on continuously growing roots.

An example of allometry can be seen in mammals. Ranging from the mouse to the elephant, as the body gets larger, in general hearts beat more slowly, brains get bigger, bones get proportionally shorter. Thus, the typical mammalian intralimb re-proportioning with the proximal limb elements exhibiting positive allometry and the very distal ones showing negative allometry was observed.

Relative lengths of the antebrachium, femur and crus increased, while those of the distal elements decreased. In such cases, the average scaling relationship of a morphological trait with body size within a population can be described quantitatively by means of a static allometry (sensu Cock, ), i.e.

by plotting the relationship between body size on the x axis and the trait of interest on the y axis for a large number of individuals of the same age.

This book presents an extensive reanalysis of scaling data collected over a quarter of a century, including many rarely or never-cited sources. The result is an unparalleled contribution to understanding scaling in mammals, addressing a uniquely extensive range of mammal attributes and using substantially larger and more rigorously screened.

Craniodental Allometry, Prenatal Growth Rates, and the Evolutionary Loss of the Third Molars in New World Monkeys. Tesla A. Monson With this relatively recent insight, there has been renewed interest in mammalian taxa that have lost the third molars. Within platyrrhines, the marmosets and tamarins (Callitrichidae family) are characterized.

Static skull morphological variation in the large Japanese field mouse (Apodemus speciosus) was analyzed using different indices of variability. Multivariate analysis of variance revealed sexual dimorphism in cranium and mandible sizes, among a total of 89 skulls (45 males and 44 females).

The coefficient of variation (CV), standard deviation (SD), and residuals of the standard deviation. Mammalian and nonmammalian vertebrates exhibit a expand faster than the size of the primary auditory cortex (A1) as overall brain size increases.

These observations suggest that various isocortical regions expand with a distinct allometry. the reader is referred to the online version of this book.) View chapter Purchase book. Observation on allometry in mammalian dentitions; its interpretation and evolutionary significance. Acta Zool.

Fenn 2– Nappi A, Brunet-Lecomte P, Montuire S. Intraspecific morphological tooth variability and geographical distribution: application to the Savi's vole, Microtus (Terricola) savii (Rodentia, Arvicolinae). Nat. In many non-mammalian vertebrates, adult dentitions result from cyclical rounds of tooth regeneration wherein simple unicuspid teeth are replaced by more complex forms.

Therefore and by contrast to mammalian models, the numerical majority of vertebrate teeth develop shape during the process of replacement.Allometry cannot be ignored in brain evolution studies.

Dean Falk (a1) Izolatelstvo Medicina) Basic Books and Plenum. Bonin, G. von Surface configuration of the telencephalon of the bottlenose dolphin with comparative anatomical observations in four other cetacean species.tion derives from studies in mice, which have relatively derived mammalian dentitions.

The marsupial Monodelphis domestica has a more plesiomorphic heterodont dentition with incisors, canines, premo-lars, and molars on both the upper and the lower jaws, and a deciduous premolar.

The complexity of the.

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