Artículo
Discrete and morphometric traits reveal contrasting patterns and processes in the macroevolutionary history of a clade of scorpions
Mongiardino Koch, Nicolás
; Ceccarelli, Fadia Sara
; Ojanguren Affilastro, Andres Alejandro
; Ramirez, Martin Javier
Fecha de publicación:
04/2017
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Evolutionary Biology
ISSN:
1010-061X
e-ISSN:
1420-9101
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Many palaeontological studies have investigated the evolution of entire body plans, generally relying on discrete character-taxon matrices. In contrast, macroevolutionary studies performed by neontologists have mostly focused on morphometric traits. Although these data types are very different, some studies have suggested that they capture common patterns. Nonetheless, the tests employed to support this claim have not explicitly incorporated a phylogenetic framework and may therefore be susceptible to confounding effects due to the presence of common phylogenetic structure. We address this question using the scorpion genus Brachistosternus Pocock 1893 as case study. We make use of a time-calibrated multilocus molecular phylogeny, and compile discrete and traditional morphometric data sets, both capturing the overall morphology of the organisms. We find that morphospaces derived from these matrices are significantly different, and that the degree of discordance cannot be replicated by simulations of random character evolution. Moreover, we find strong support for contrasting modes of evolution, with discrete characters being congruent with an ‘early burst’ scenario whereas morphometric traits suggest species-specific adaptations to have driven morphological evolution. The inferred macroevolutionary dynamics are therefore contingent on the choice of character type. Finally, we confirm that metrics of correlation fail to detect these profound differences given common phylogenetic structure in both data sets, and that methods incorporating a phylogenetic framework and accounting for expected covariance should be favoured.
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Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Mongiardino Koch, Nicolás; Ceccarelli, Fadia Sara; Ojanguren Affilastro, Andres Alejandro; Ramirez, Martin Javier; Discrete and morphometric traits reveal contrasting patterns and processes in the macroevolutionary history of a clade of scorpions; Wiley Blackwell Publishing, Inc; Journal of Evolutionary Biology; 30; 4; 4-2017; 814-825
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