Ontogenetic Data Analyzed As Such in Phylogenies

Area of Science:

• Evolutionary biology
• Paleontology
• Developmental biology

Background:

• Phylogenetic analyses traditionally use limited ontogenetic data.
• Current methods often miss crucial information from developmental stages.
• Ontogenetic trajectories offer a richer source of phylogenetic information.

Purpose of the Study:

• To develop a novel method for integrating ontogenetic data into phylogenetic analyses.
• To maximize the extraction of phylogenetic information from ontogenetic trajectories.
• To improve the accuracy of phylogenetic reconstructions.

Main Methods:

• Coding precise timings of discrete feature transformations during ontogeny.
• Modeling continuous features using growth laws and least-square regressions.
• Including growth law parameters as continuous characters in phylogenetic coding schemes.

Main Results:

• Phylogenetic reconstruction using ontogeny yielded higher retention index, bootstrap support, and stratigraphic congruence.
• Morphological traits, even homoplastic ones, showed better fit to parsimonious trees when ontogeny was included.
• Growth rates and patterns proved more informative than adult shapes for phylogeny.

Conclusions:

• Integrating ontogenetic dimension enhances phylogenetic reconstruction accuracy.
• Ontogenetic paths can be more phylogenetically relevant than adult morphology alone.
• The proposed method offers a more comprehensive approach to evolutionary studies.