Sep 9, 2013 Explore more at http://www.birdsofparadiseproject.org.There is a dizzying diversity of species on our planet. From genetic evidence we know

May 8, 2014 Heterochrony, the phylogenic change in the time of developmental events or rate of them into a predictive model of evolution and speciation.

The only putative exception is the butterfly orchids (Platanthera) of the Azores, where three species apparently reflect at least one cladogenetic speciation event. This multidisciplinary study explores the origin, speciation Heterochrony, broadly defined, refers to evolutionary change in the rate or timing of development. The concept has long been central to evolutionary developmental biology and remains actively investigated; it has dominated the literature of evolutionary developmental biology. Heterochrony is known as a developmental change in the timing or rate of ontogenetic events across phylogenetic lineages. It is a key concept synthesizing development into ecology and evolution to explore the mechanisms of how developmental processes impact on phenotypic novelties.

Heterochrony speciation

phenotypic plasticity and heterochrony in cichlasoma managuense (pisces, cichlidae) and their implications for speciation in cichlid fishes Axel Meyer Museum of Vertebrate Zoology and Department of Zoology, University of California, Berkeley, CA, 94720 2013-08-21 · Heterochrony, the altered timing of developmental events between ancestors and descendants, could be such a link although the processes responsible for producing heterochrony, widely viewed as an interspecific phenomenon, are still unclear. 2002-03-19 · Heterochrony (changes in the rates of developmental growth and/or shifts in the timing of developmental events) has been successfblly argued as the most probable process by which the rapid speciation changes inherent to the concept of punctuated equilibrium could occur. As a consequence, heterochrony may be the most significant Conclusions: From an evo-devo perspective, the evolution of clades with high diversity and/or disparity can be addressed from three main perspectives: (1) evolvability, in terms of release from previous constraints and of the presence of genetic or developmental conditions favouring multiple parallel occurrences of a given evolutionary transition and its reversal; (2) phenotypic plasticity as a facilitator of speciation; and (3) modularity, heterochrony and a coupling between the complexity 2021-03-12 · Speciation via floral heterochrony and presumed mycorrhizal host switching of endemic butterfly orchids on the Azorean archipelago species and speciation, led Vrba (1980) to pro pose that physical change is required for most speciation. Paterson (1978, 1982, 1985) argued that change in the fertilization system, the crit ical evolutionary change in sexual speciation, is most likely to occur in small, isolated pop ulations that are under selection pressure Heterochrony and speciation Variation in inherited develop- mental trajectories provides the raw material upon which natural selection may actl(.

Aug 18, 2016 A famous example of heterochrony is paedomorphosis in caudate the paedomorphs and speciation in isolated wetlands surrounded by

ISSN 0014-3820. Available under: doi: 10.2307/2409100 Premise of the study: Most orchid species native to the Macaronesian islands reflect immigration from western Europe or North Africa followed by anagenesis. The only putative exception is the butterfly orchids (Platanthera) of the Azores, where three species apparently reflect at least one cladogenetic speciation event.

species and speciation, led Vrba (1980) to pro pose that physical change is required for most speciation. Paterson (1978, 1982, 1985) argued that change in the fertilization system, the crit ical evolutionary change in sexual speciation, is most likely to occur in small, isolated pop ulations that are under selection pressure

We conclude that both sequential and growth heterochrony appear to have played a key role in the evolution of Niphargus, the most diverse genus of freshwater amphipods. A preliminary list of heterochronic characters is provided. r 2008 Gesellschaft fu¨r Biologische Systematik. Published by Elsevier GmbH. Differences in diet and possibly in feeding mode are believed to have caused these phenotypic changes.

Differences in diet and possibly in feeding mode are believed to have caused these phenotypic changes.
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Available under: doi: 10.2307/2409100 Premise of the study: Most orchid species native to the Macaronesian islands reflect immigration from western Europe or North Africa followed by anagenesis.

1357-1369. ISSN 0014-3820.
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Heritability and heterochrony of polychromatism in a Lake Victoria Cichlid fish: stepping stones for speciation?

Coming of age in Fringillid birds - heterochrony in the ontogeny of secondary Speciation in birds - a complete picture2002Ingår i: Journal of Evolutionary Heterochrony--changes in developmental timing, producing parallels between Gould argues that the primary evolutionary value of heterochrony may lie in immediate I used it in my studies about neandertals: the speciation problem. Suppose (as must often happen) that developmental heterochrony produces a each speciation event has an equal probability of leading either to greater or to ecological speciation by the combination of field studies and experiments, particularly in the fields of morphometric heterochrony and comparative behaviour. Plasticity and Heterochrony in Cichlasoma Managuense (Pisces, Cichlidae) and their Implications for Speciation in Cichlid Fishes" Evolution, Sammanfattning : A critical step in ecological speciation is the development of reproductive isolation. The processes leading up to reproductive isolation are Be on understanding the role of sex-chromosomes in speciation and adaptation and investigating the evolutionary consequences of variation in recombination (2017) Neomorphosis and heterochrony of skull shape in dog domestication.

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May 28, 2008 light of possible convergent features accompanied by 'cryptic' speciation. We conclude that both sequential and growth heterochrony appear

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2012-06-05 · Heterochrony takes the form of both increased and decreased degrees of development, known as “peramorphosis” and “paedomorphosis,” respectively. These are the morphological consequences of the operation of processes that change the duration of the period of an individual’s growth, either starting or stopping it earlier or later than in the ancestor, or by extending or contracting the period of growth.

Author(s) Maan, Martine E. Haesler, Marcel P. Seehausen, Ole (Fish Ecology and Evolution FISHEC) van Alphen, Jacques J.M. Journal . Journal of Experimental Zoology. Part B: Molecular and Developmental Evolution.

HALLAM A. 1989 - Heterochrony as an alternative to spe- cies selection in the generation of phyletic trends. Geobios, Mem. sp.. 12 • Heterochrony involves a shift in the timing of developmental processes so an event occurs earlier, later, or at a different rate in a taxon compared to its ancestor.