Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula

The morphology of cephalic scales in Lacertids is organised in well defined geometrical structures. The variation of these elements is related to the underlying bone growth and morphogenesis, but it is also associated with the muscular system and the sutural dynamics. In this paper, the patterns of...

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Autores principales:	Bruner,Emiliano, Costantini,David
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2009
Materias:	Lacertids Head morphology Geometric morphometrics Morphospace Fronto-parietal suture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300008
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spelling	oai:scielo:S0717-950220090003000082010-04-05Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis siculaBruner,EmilianoCostantini,David Lacertids Head morphology Geometric morphometrics Morphospace Fronto-parietal suture The morphology of cephalic scales in Lacertids is organised in well defined geometrical structures. The variation of these elements is related to the underlying bone growth and morphogenesis, but it is also associated with the muscular system and the sutural dynamics. In this paper, the patterns of variation of the cephalic scales have been compared between three common Mediterranean species: Podarcis muralis, Podarcis sicula and Lacerta bilineata. The morphospace generated by the morphological relationships within the cephalic system in these three species is investigated in order to consider their degree of variation and their anatomical peculiarities. Generally, Lacerta is 64% larger than Podarcis, shows a relative reduction of the frontal scale, enlarged fronto-parietal structures, and stretched occipital area. L. bilineata shows the smaller degree of variation within the shape space, while P. muralis shows the highest values. The morphology of the two genera is definitely different mostly because of allometric variation. Non-allometric distinctions between the three species are subtle but detectable. The degree and pattern of variation are interpreted in terms of possible environmental pressures and of functional cranial dynamics associated with the fronto-parietal suture, respectively. In this sense, the structural relationships between bones and scales are of particular interest to further investigate ontogeny and phylogeny in reptiles.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.27 n.3 20092009-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300008en10.4067/S0717-95022009000300008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Lacertids Head morphology Geometric morphometrics Morphospace Fronto-parietal suture
spellingShingle	Lacertids Head morphology Geometric morphometrics Morphospace Fronto-parietal suture Bruner,Emiliano Costantini,David Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula
description	The morphology of cephalic scales in Lacertids is organised in well defined geometrical structures. The variation of these elements is related to the underlying bone growth and morphogenesis, but it is also associated with the muscular system and the sutural dynamics. In this paper, the patterns of variation of the cephalic scales have been compared between three common Mediterranean species: Podarcis muralis, Podarcis sicula and Lacerta bilineata. The morphospace generated by the morphological relationships within the cephalic system in these three species is investigated in order to consider their degree of variation and their anatomical peculiarities. Generally, Lacerta is 64% larger than Podarcis, shows a relative reduction of the frontal scale, enlarged fronto-parietal structures, and stretched occipital area. L. bilineata shows the smaller degree of variation within the shape space, while P. muralis shows the highest values. The morphology of the two genera is definitely different mostly because of allometric variation. Non-allometric distinctions between the three species are subtle but detectable. The degree and pattern of variation are interpreted in terms of possible environmental pressures and of functional cranial dynamics associated with the fronto-parietal suture, respectively. In this sense, the structural relationships between bones and scales are of particular interest to further investigate ontogeny and phylogeny in reptiles.
author	Bruner,Emiliano Costantini,David
author_facet	Bruner,Emiliano Costantini,David
author_sort	Bruner,Emiliano
title	Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula
title_short	Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula
title_full	Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula
title_fullStr	Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula
title_full_unstemmed	Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula
title_sort	head morphology and degree of variation in lacerta bilineata, podarcis muralis and podarcis sicula
publisher	Sociedad Chilena de Anatomía
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300008
work_keys_str_mv	AT bruneremiliano headmorphologyanddegreeofvariationinlacertabilineatapodarcismuralisandpodarcissicula AT costantinidavid headmorphologyanddegreeofvariationinlacertabilineatapodarcismuralisandpodarcissicula
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Head Morphology and Degree of Variation in Lacerta bilineata, Podarcis muralis and Podarcis sicula

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