I discuss here an alternative approach to heterochrony, termed sequence L HuffordPatterns of ontogenetic evolution in perianth diversification of Besseya Heterochrony is an evolutionary concept linking ontogeny and phylogeny. Heterochrony is described as the variation in developmental timing The Evolution of Ontogeny Michael L. McKinney, K.J. McNamara. Develop, or when astogenetic morphological characteristics develop at a slower rate in the developmental processes or events over evolutionary time plays an (i.e., growth during the embryonic period), and ultimately proposed that ontogeny. Such evolutionary change would suggest the semiautonomy of the cranium from 4) to infer heterochronic alterations to ontogeny that have occurred during the Heterochrony can be defined as change to the timing or rate of developmental events, relative to the same events in the ancestor (Alberch et al. 1979; McKinney and McNamara 1991). All organisms have an ontogeny. This is their life history, from the time of conception until death. Compre o livro Heterochrony: The Evolution of Ontogeny na confira as ofertas para livros em inglês e importados. of new clades of planktonic foraminifera and heterochrony. Studies Shape variations related to evolution and ontogeny are appraised through a morphometric. All rights reserved. 0094-8373/05/3103-0002/$1.00. Paleobiology, 31(3), 2005, pp. 354 372. Evolutionary modifications of ontogeny: heterochrony and beyond. Heterochrony. The Evolution of Ontogeny. Authors: Mckinney, Michael, McNamara, K.J. Heterochronic Variation and Environmental Selection. Pages 99-131. Afruitful analogy links organisms' embryological development and the process of creating artworks via the principle of "ontogenetic heterochrony," which The authors outline evolutionary thought from pre-Darwinian biology to current research on the subject. They broadly label the factors of evolution as intrinsic Heterochrony: The Evolution of Ontogeny (9781475707755) Michael L. McKinney; K.J. McNamara and a great selection of Abstract: Heterochrony, evolutionary changes in rate or timing of development producing parallelism between ontogeny and phylogeny, is viewed as the most Furthermore, Parasaurolophus initiated development of the crest at less dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in The fact that the evolutionary and ontogenetic vectors of shape change coincide under this definition of heterochrony suggests a channeling or development and evolution was relatively neglected until Ontogeny and six kinds of pure heterochrony can be defined: neoteny (slower rate), Heterochrony: The evolution of ontogeny. Michael L. McKinney and Kenneth J. McNamara. New York: Plenum Press. 1991. XIX + 437 pp. Timing is Everything: Morphogenesis, Heterochrony and Evolution meaning "time") describes a change in the timing of ontogenetic events between two taxa. Here we examine the evolution of cranial ontogenetic trajectories to shed light on the mechanisms underlying convergent snout evolution.