INVESTIGADORES
CATALANO Santiago Andres
artículos
Título:
PASOS: a method for the Phylogenetic Analysis of Shape Ontogenies
Autor/es:
CATALANO, SANTIAGO ANDRÉS; SEGURA VALENTINA; VERA CANDIOTI, MARÍA FLORENCIA
Revista:
CLADISTICS (PRINT)
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2019
ISSN:
0748-3007
Resumen:
We present a novel phylogenetic approach toinfer ancestral ontogenies of shape characters described as landmarkconfigurations. The method is rooted in previously published theoreticaldevelopments to analyze landmark data in a phylogenetic context with parsimonyas the optimality criterion (Catalano etal., 2010), using in this case the minimization of differences in landmarkposition to define not only ancestral shapes but also the changes indevelopmental timing between ancestor-descendant shape ontogenies. Evolutionarychanges along the tree represent changes in relative developmental timing betweenontogenetic trajectories (possible heterochronic events) and changes in shapewithin each stage. The method requires determining the shape of the specimensbetween two standard events, for instance birth and onset of sexual maturity. Oncethe ontogenetic trajectory is discretized into a series of consecutive stages,the method enables the user to identify changes in developmental timing associatedwith changes in the offset and/or onset of the shape ontogenetic trajectories. Themethod is implemented in a C language program called SPASOS. The analysis oftwo empirical examples (anurans and felids) using this novel method yielded resultsin agreement with previous hypotheses about shape evolution in these groupsbased on non-phylogenetic analyses