Structural and environmental constraints on paired appendages reduction among vertebrates
Macaluso, Loredana (Università degli Studi di Torino. Dipartimento di Scienze della Terra)
Carnevale, Giorgio (Università degli Studi di Torino. Dipartimento di Scienze della Terra)
Casu, Raffaello (Università degli Studi di Torino. Dipartimento di Fisica)
Pietrocola, Daniel (Università degli Studi di Torino. Dipartimento di Scienze della Terra)
Villa, Andrea (Università degli Studi di Torino. Dipartimento di Scienze della Terra)
Delfino, Massimo (Institut Català de Paleontologia Miquel Crusafont)

Fecha:	2019
Resumen:	Burrowing habits or complex environments have generally been considered as potential drivers acting on reduction and loss of the appendicular skeleton among vertebrates. Herein, we suggest that this might be the case for lissamphibians and squamates, but that fin loss in fishes is usually prevented by important structural constraints, because pectoral fins are commonly used to control rolling and pitching. We provide an overview of the distribution of paired appendage reduction across vertebrates while examining the ecological affinities of finless and limbless clades. We analysed the correlation between lifestyle and fin or limb loss using the discrete comparative analysis. The resulting Bayesian factors indicate strong evidence of correlation between: (1) pectoral-fin loss and coexistence of anguilliform elongation and burrowing habits or complex habitat in teleost fishes; and (2) limb loss and a burrowing or grass-swimming lifestyle in squamate reptiles and lissamphibians. These correlations suggest that a complex environment or a fossorial habit is a driving force leading to appendage loss. The only style of locomotion that is functional even in the absence of paired appendages is the undulatory one, which is typical of all elongated reptiles and lissamphibians, but certainly less common in teleost fishes.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Publicado en:	Biological Journal of the Linnean Society, Vol. 128, issue 2 (Oct. 2019) , ISSN 1095-8312

DOI: 10.1093/biolinnean/blz097

Postprint 54 p, 2.1 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut Català de Paleontologia Miquel Crusafont (ICP)
Artículos > Artículos de investigación
Artículos > Artículos publicados