During the last decades the study of functional morphology received more attention incorporating more detailed data corresponding to the internal anatomy that together contribute for a better understanding of the func...During the last decades the study of functional morphology received more attention incorporating more detailed data corresponding to the internal anatomy that together contribute for a better understanding of the functional basis in locomotion.Here we focus on 2 lizard families,Tropiduridae and Liolaemidae,and use information related to muscle-tendinous and external morphology traits of hind legs.We investigate whether the value of the traits analyzed tend to exhibit a reduced phenotypic variation produced by stabilizing selection,and whether species showing specialization in their habitat use will also exhibit special morphological features related to it.As a result,we identified that evolution of hind limb traits is mainly explained by the Ornstein-Uhlenbeck model,suggesting stabilizing selection.Liolaemids and tropidurids show clear ecomorphological trends in the variables considered,with sand lizards presenting the most specialized morphological traits.Some ecomorphological trends differ between the 2 lineages,and traits of internal morphology tend to be more flexible than those of external morphology,restricting the ability to identify ecomorphs shared between these 2 lineages.Conservative traits of external morphology likely explain such restriction,as ecomorphs have been historically defined in other lizard clades based on variation of external morphology.展开更多
基金funded by a CONICET grant(1035/2013)awarded to VA and the FAPESP grant 2012/51012-6 awarded to TK as part of an international collaboration initiative between Argentinian and Brazilian funding agencies and PIP CONICET 0284 to VA.Lina Moreno Azócar and R.Brandt were very helpful with statistical discussions during the process of data analyses.
文摘During the last decades the study of functional morphology received more attention incorporating more detailed data corresponding to the internal anatomy that together contribute for a better understanding of the functional basis in locomotion.Here we focus on 2 lizard families,Tropiduridae and Liolaemidae,and use information related to muscle-tendinous and external morphology traits of hind legs.We investigate whether the value of the traits analyzed tend to exhibit a reduced phenotypic variation produced by stabilizing selection,and whether species showing specialization in their habitat use will also exhibit special morphological features related to it.As a result,we identified that evolution of hind limb traits is mainly explained by the Ornstein-Uhlenbeck model,suggesting stabilizing selection.Liolaemids and tropidurids show clear ecomorphological trends in the variables considered,with sand lizards presenting the most specialized morphological traits.Some ecomorphological trends differ between the 2 lineages,and traits of internal morphology tend to be more flexible than those of external morphology,restricting the ability to identify ecomorphs shared between these 2 lineages.Conservative traits of external morphology likely explain such restriction,as ecomorphs have been historically defined in other lizard clades based on variation of external morphology.
