IPEEC - CENPAT   25619
INSTITUTO PATAGONICO PARA EL ESTUDIO DE LOS ECOSISTEMAS CONTINENTALES
Unidad Ejecutora - UE
artículos
Título:
The shadow of the past: Convergence of young and old South American desert lizards as measured by head shape traits
Autor/es:
AVILA, L.J.; MORANDO, M.; SITES, J.W., JR.; DE LA RIVA, I.J.; TRONCOSO-PALACIOS, J.; AGUILAR PUNTRIANO, C.; JOHNSON, L.A.; WOOD, P.J.
Revista:
Ecology and Evolution
Editorial:
Wiley
Referencias:
Año: 2018 p. 11399 - 11409
ISSN:
2045-7758
Resumen:
Convergence is a pervasive phenomenon in the Tree of Life, and evolution of similar phenotypes sharing the same environmental conditions is expected in phylogeneticallyclosely related species. In contrast, contingent factors are probably more influentialin shaping phenotypic diversity for distantly related taxa. Here, we test putativeconvergent evolution of lizard head morphologies among relatively closely relateddesert dwelling Liolaemus species, and the very distantly related Ctenoblepharys adspersa.We estimated a multilocus time‐calibrated phylogeny of 57 species of SouthAmerican liolaemus lizards, based on seven molecular markers. We collected headshape data for 468 specimens, and used three phylogenetic comparative methods(SURFACE, CONVEVOL, and WHEATSHEAF index) to test for and estimate thestrength of convergence. We found strong evidence for convergence among Pacificdesert lizard C. adspersa, Liolaemus audivetulatus, Liolaemus insolitus, Liolaemus poconchilensis, Liolaemus stolzmanni, and a candidate species (Liolaemus ?Moquegua?). Ourresults suggest that, despite the long divergence and phylogenetic distance of C. adspersawith respect to convergent Liolaemus species, natural selection was probablymore important than historical contingency in shaping phenotypic evolution in thesedesert lizards.