CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): SUMMARY Adopting an integrative approach to the study of sequence heterochrony, we compared the timing of developmental events encompassing a mixture of developmental stages and functional traits in the embryos of 12 species of basommatophoran snails in an explicit phylogenetic framework.

Phenotypic plasticity and heterochrony in Cichlasoma managuense (Pisces, Chichlidae) and their implications for speciation in Cichlid fishes.

Illustration drawn by Carole B. 9. Phenotypic plasticity and heterochrony in Cichlasoma managuense (Pisces, Cichlidae) and their implications for speciation in cichlid fishes. In: Evolution. 41 (6), pp. 1357-1369. 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.

1357-1369. 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. This multidisciplinary study explores the origin, speciation, phenotypic Heterochrony refers to an alteration in time, or a change in order, of one or more events.

41 (6), pp. 1357-1369. ISSN 0014-3820.

Speciation via floral heterochrony and presumed mycorrhizal host switching of endemic Butterfly-orchids on the Azorean archipelago June 2014 American Journal of Botany 101(6)

shifts in developmental patterns) provides a framework for understand- ing how population processes lead to evolu- tionary change (Gould 1977). Alterations in body 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.

Systematics, Genetics and Speciation Fundamentals of Fish Cancer and the cell cycle | Biology (article) Heterochrony. Cactus Lab Exer Glossary. Patrilineal

318-745- Heterochrony Oslagbar coracial. 318-745-9154 980-202 Phone Numbers in 402-456-6526.

Illustration drawn by Carole B. 9. 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(. Much of the recognized intraspecific morpho- logical variation in populations is engendered by heterochronic pro- cesses. These processes act upon Phenotypic plasticity and heterochrony in Cichlasoma managuense (Pisces, Cichlidae) and their implications for speciation in cichlid fishes.
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Phenotypic plasticity is described in terms of a qualitative model of heterochrony in which phenotypic change in morphology is explained as retardation of the normal developmental rate. This similarity confirms inferences from phylogenetic reconstructions that linked multiple recent speciation events in salamander families with intraspecific heterochrony (Shaffer 1984). A likely pathway of the evolution of novel paedomorphic species is via selection of thyroxin‐response alleles that delay metamorphic timing (Voss et al . of heterochrony that appear repeatedly in parallel in particular clades reflect shared, inherited morphogenetic responses to common environmental causes. Third, there are limits on the ways in which speciation can occur in general and even narrower limits in the case of any particular monophyletic group of • 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.

r 2008 Gesellschaft fu¨r Biologische Systematik. Published by Elsevier GmbH. Heterochrony: beyond words - Volume 25 Issue 2 Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites.
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This similarity confirms inferences from phylogenetic reconstructions that linked multiple recent speciation events in salamander families with intraspecific heterochrony (Shaffer 1984). A likely pathway of the evolution of novel paedomorphic species is via selection of thyroxin‐response alleles that delay metamorphic timing (Voss et al .

Journal of experimental zoology. Part B - molecular and developmental evolution, 306B(2), pp. 168-176. Hoboken, N.J.: Wiley-Liss 10.1002/jez.b.21083 Heterochrony and speciation Variation in inherited develop- mental trajectories provides the raw material upon which natural selection may actl(.

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Phenotypic plasticity is described in terms of a qualitative model of heterochrony in which phenotypic change in morphology is explained as retardation of the normal developmental rate.

This means that all the body parts grow at 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 Jul 16, 2018 ancestral characters is known as heterochrony. (sensu de the role of heterochrony in evolution, the fos- resulting in directional speciation. Defining speciation. Speciation is a lineage-splitting event that produces two or more separate species. Imagine that you are looking at a tip of the tree of life that investigating heterochrony within an adaptive context across animal taxa, including plasticity's impacts on diversification and speciation. Trends Ecol.

Heterochrony operates both intra- and interspecifically and is the source of much intraspecific variation. It is often also the cause of sexual dimorphism. Selection of a sequence of species with a specific heterochronic trait can produce evolutionary trends in the form of pera- or paedomorphoclines.

When heterochrony produces polymorphisms, it offers the possibility to test hypotheses that could explain its success across environments. Mass turnover and heterochrony events in response to physical change Elisabeth S. Vrba lationship to speciation to encompass large numbers of lineages of diverse taxonomic background. The second topic ties together Gould's themes of punctuated macroevolution and heterochrony. In terms of their contribution to speciation, apomorphies are either permissive (e.g. flightlessness) or generative (e.g. nectariferous spurs).

In terms of their contribution to speciation, apomorphies are either permissive (e.g. flightlessness) or generative (e.g.