Developmental palaeontology in synapsids: the fossil record of ontogeny in mammals and their closest relatives
- 13 January 2010
- journal article
- review article
- Published by The Royal Society in Proceedings. Biological sciences
- Vol. 277 (1685), 1139-1147
- https://doi.org/10.1098/rspb.2009.2005
Abstract
The study of fossilized ontogenies in mammals is mostly restricted to postnatal and late stages of growth, but nevertheless can deliver great insights into life history and evolutionary mechanisms affecting all aspects of development. Fossils provide evidence of developmental plasticity determined by ecological factors, as when allometric relations are modified in species which invaded a new space with a very different selection regime. This is the case of dwarfing and gigantism evolution in islands. Skeletochronological studies are restricted to the examination of growth marks mostly in the cement and dentine of teeth and can provide absolute age estimates. These, together with dental replacement data considered in a phylogenetic context, provide life-history information such as maturation time and longevity. Palaeohistology and dental replacement data document the more or less gradual but also convergent evolution of mammalian growth features during early synapsid evolution. Adult phenotypes of extinct mammals can inform developmental processes by showing a combination of features or levels of integration unrecorded in living species. Some adult features such as vertebral number, easily recorded in fossils, provide indirect information about somitogenesis and hox-gene expression boundaries. Developmental palaeontology is relevant for the discourse of ecological developmental biology, an area of research where features of growth and variation are fundamental and accessible among fossil mammals.This publication has 79 references indexed in Scilit:
- Homeotic effects, somitogenesis and the evolution of vertebral numbers in recent and fossil amniotesProceedings of the National Academy of Sciences of the United States of America, 2010
- Diversity trends and their ontogenetic basis: an exploration of allometric disparity in rodentsProceedings. Biological sciences, 2009
- Insular dwarfism in hippos and a model for brain size reduction in Homo floresiensisNature, 2009
- Heterochrony and patterns of cranial suture closure in hystricognath rodentsJournal of Anatomy, 2009
- New Protocetid Whale from the Middle Eocene of Pakistan: Birth on Land, Precocial Development, and Sexual DimorphismPLOS ONE, 2009
- Dental eruption in afrotherian mammalsBMC Biology, 2008
- Pygmoid Australomelanesian Homo sapiens skeletal remains from Liang Bua, Flores: Population affinities and pathological abnormalitiesProceedings of the National Academy of Sciences of the United States of America, 2006
- Tooth microstructure tracks the pace of human life-history evolutionProceedings. Biological sciences, 2006
- Development of bat flight: Morphologic and molecular evolution of bat wing digitsProceedings of the National Academy of Sciences of the United States of America, 2006
- Experimental taphonomy shows the feasibility of fossil embryosProceedings of the National Academy of Sciences of the United States of America, 2006