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Repeated evolution of similar phenotypes: Integrating comparative methods with developmental pathways.

Anieli Guirro Pereira1, Tiana Kohlsdorf1

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Recurrent evolution, or homoplasy, arises from developmental changes. This review integrates developmental mechanisms with phylogenetic tools to understand repeated trait evolution and loss.

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Area of Science:

  • Evolutionary biology
  • Developmental biology
  • Phylogenetics

Background:

  • Repeated phenotypes (homoplasies) can arise from changes in developmental processes.
  • Understanding the genetic basis of recurrent evolution is a growing area of research.
  • Modern phylogenetic tools combined with developmental data offer new insights.

Purpose of the Study:

  • To review the evolution of repeated phenotypes from an integrated perspective.
  • To revisit definitions of convergence and parallelism.
  • To explore how developmental pathways influence trait evolution and loss.

Main Methods:

  • Comparative methods integrating phylogenetic inference.
  • Estimates of evolutionary rates.
  • Reconstruction of ancestral states.
  • Analysis of developmental mechanisms underlying trait expression and loss.

Main Results:

  • Methodological approaches can identify evolutionary patterns of repeated traits.
  • Developmental mechanisms are linked to the intermittent expression of traits.
  • Repeated trait loss presents challenges to classical definitions of convergence and parallelism.

Conclusions:

  • Changes in developmental pathways likely explain the high frequency of repeated trait loss.
  • An integrated approach is crucial for understanding recurrent evolution.
  • Rethinking definitions of convergence and parallelism may be necessary.