Development of epiphyseal structure and function in Didelphis virginiana (Marsupiala, Didelphidae)

Journal of Morphology
M W Hamrick

Abstract

This study addressed the question of how the epiphyses of growing mammals change their external shape and internal architecture during postnatal development. Ontogenetic transformations in the external form and internal structure of the fore- and hindlimb epiphyses were examined in a mixed cross-sectional sample of Didelphis virginiana using two methods: morphometric analysis of linear epiphyseal dimensions and histological staining of serially sectioned epiphyses. Metric data indicate that Virginia opossums are born with relatively short hindlimbs and long forelimbs, but by the time they are weaned their hindlimbs are longer than their forelimbs. Functional integration of the locomotor system in D. virginiana involves a decoupling of fore- and hindlimb growth rates so that between birth and weaning, femoral length, diaphyseal cross-sectional area, and articular surface area increase at a significantly faster rate than the corresponding humeral dimensions. Histological results demonstrate that these differences in growth rate are reflected in morphology of the humeral and femoral growth plate and epiphyseal cartilages. The humeral cartilages exhibit a level of cellular organization characteristic of more mature limb elements at...Continue Reading

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Citations

Sep 2, 2003·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Mark W Hamrick
Feb 7, 2014·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Anastasia Beiriger, Karen E Sears
Oct 28, 2008·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Timothy D SmithAnne M Burrows
Sep 4, 2020·PeerJ·Alice L DenyerJohn R Hutchinson
Mar 29, 2012·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Timothy D SmithAnne M Burrows
Jan 31, 2014·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Kevin Turley, Stephen R Frost
May 21, 2014·American Journal of Physical Anthropology·Kevin Turley, Stephen R Frost
Dec 22, 1999·Journal of Theoretical Biology·M W Hamrick
Apr 21, 2001·Journal of Human Evolution·M W Hamrick

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