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# Combining geometric morphometrics and phylogenetic comparative methods: a new approach to decipher evolutionary trends in human evolution

Hugo Hautavoine, Antonio Profico, Antoine Balzeau, Aurélien Mounier

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Hugo Hautavoine, Antonio Profico, Antoine Balzeau, Aurélien Mounier. Combining geometric mor-
phometrics and phylogenetic comparative methods: a new approach to decipher
in human evolution. 1850e réunion scientifique de la SAP, Société d'anthropologie de paris, Jan 2025,
Paris, France. 10.4000/1330m. hal-05020274

HAL Id: hal-05020274

https://hal.science/hal-05020274v1

Submitted on 4 Apr 2025

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# Combining geometric morphometrics and phylogenetic comparative methods: a new approach to decipher evolutionary trends in human evolution

*Combiner la morphométrie géométrique et les méthodes comparatives en phylogénie : une nouvelle approche pour déceler des tendances évolutionnaires dans l'évolution humaine*

Hugo Hautavoine, Antonio Profico, Antoine Balzeau et Aurélien Mounier

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OpenEdition
Journals

## Édition électronique

URL : https://journals.openedition.org/bmsap/14957

DOI : 10.4000/1330m

ISSN : 1777-5469

## Éditeur

Société d'Anthropologie de Paris

Ce document vous est fourni par Muséum national d'histoire naturelle

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## Référence électronique

Hugo Hautavoine, Antonio Profico, Antoine Balzeau et Aurélien Mounier, « Combining geometric morphometrics and phylogenetic comparative methods: a new approach to decipher evolutionary trends in human evolution », *Bulletin et mémoires de la Société d'Anthropologie de Paris* [En ligne], 37(S) | 2025, mis en ligne le 16 janvier 2025, consulté le 04 avril 2025. URL : http://journals.openedition.org/bmsap/14957 ; DOI : https://doi.org/10.4000/1330m

Ce document a été généré automatiquement le 4 février 2025.

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# Combining geometric morphometrics and phylogenetic comparative methods: a new approach to decipher evolutionary trends in human evolution

Combiner la morphométrie géométrique et les méthodes comparatives en phylogénie : une nouvelle approche pour déceler des tendances évolutionnaires dans l'évolution humaine

Hugo Hautavoine, Antonio Profico, Antoine Balzeau et Aurélien Mounier

<footnote n="1">1 Deciphering evolutionary trends within a phylogenetic context from 3D shape data is a long-standing issue in phylogenetic multivariate comparative methods (PCMs). Phylogenetic modelling combines PCMs and geometric morphometrics to calculate potential ancestors' morphologies at each node of a phylogenetic tree, following different evolutionary models. This method is used to explore evolutionary trends in a phylogenetic tree using shape data. Using shape data as morphological variables in PCMs is of great interest to detect variability of different signals at a local scale. However, the potential of phylogenetic modelling is limited as it is constrained by the scarcity of the fossil record and the use of mean shapes for each terminal taxa of the phylogeny to calculate the virtual common ancestors (VCAs). We present new functionalities to phylogenetic modelling approaches through the coding of R functions. The first function, nodeCoord, calculates VCAs without relying on the mean shapes of each terminal taxon of the phylogeny, instead, nodeCoord models a population of VCAs using the bootstrapping method to compute the available morphological variation of each terminal taxon of a phylogenetic tree. An add-on to this function, projPCA makes it possible to predict the VCAs shape by projecting them into the full morphospace defined by the shapes of each terminal taxon and the original sample. Then, to map the strength of the phylogenetic signal on a very fine</footnote>
scale, we coded the function phyloSigval, which estimates the value of the phylogenetic signal, i.e., Blomberg's K, at each 3D landmark. To visualize these values in 3D, we developed the phyloSigma function. To explore the potential of these functions, we apply them to two reproducible case studies based on datasets of cranial 3D shape data and fully resolved phylogenies: 1) fossil and current taxa of the genus *Homo*; 2) larger phylogenetic context with current haplorrhini taxa.

## AUTEURS

### HUGO HAUTAVOINE

UMR 7194 - Histoire Naturelle de l'Homme Préhistorique (HNHP), PaleoFED team, Muséum National d'Histoire Naturelle, CNRS, UPVD, Association Sorbonne Universités, Musée de l'Homme, Paris, France ; hugo.hautavoine[at]edu.mnhn.fr

### ANTONIO PROFICO

Department of Biology, University of Pisa, Pisa, Italy

### ANTOINE BALZEAU

UMR 7194 - Histoire Naturelle de l'Homme Préhistorique (HNHP), PaleoFED team, Muséum National d'Histoire Naturelle, CNRS, UPVD, Association Sorbonne Universités, Musée de l'Homme, Paris, France

### AURÉLIEN MOUNIER

UMR 7194 - Histoire Naturelle de l'Homme Préhistorique (HNHP), PaleoFED team, Muséum National d'Histoire Naturelle, CNRS, UPVD, Association Sorbonne Universités, Musée de l'Homme, Paris, France ; Turkana Basin Institute, Nairobi, Kenya ; CNRS UAR 3129 - UMIFRE 11, Maison Française d'Oxford, Oxford, UK