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Cranial integration in the fire salamander, Salamandra salamandra (Caudata: Salamandridae)

Bon, M; Bardua, C; Goswami, A; Fabre, A-C; (2020) Cranial integration in the fire salamander, Salamandra salamandra (Caudata: Salamandridae). Biological Journal of the Linnean Society , 130 (1) pp. 178-194. 10.1093/biolinnean/blaa020. Green open access

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Abstract

Phenotypic integration and modularity are concepts that represent the pattern of connectivity of morphological structures within an organism. Integration describes the coordinated variation of traits, and analyses of these relationships among traits often reveals the presence of modules, sets of traits that are highly integrated but relatively independent of other traits. Phenotypic integration and modularity have been studied at both the evolutionary and static level across a variety of clades, although most studies thus far are focused on amniotes, and especially mammals. Using a high-dimensional geometric morphometric approach, we investigated the pattern of cranial integration and modularity of the Italian fire salamander (Salamandra salamandra giglioli). We recovered a highly modular pattern, but this pattern did not support either entirely developmental or functional hypotheses of cranial organisation, possibly reflecting complex interactions amongst multiple influencing factors. We found that size had no significant effect on cranial shape, and that morphological variance of individual modules had no significant relationship with degree of within-module integration. The pattern of cranial integration in the fire salamander is similar to that previously recovered for caecilians, with highly integrated jaw suspensorium and occipital regions, suggesting possible conservation of patterns across lissamphibians.

Type: Article
Title: Cranial integration in the fire salamander, Salamandra salamandra (Caudata: Salamandridae)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/biolinnean/blaa020
Publisher version: http://dx.doi.org/10.1093/biolinnean/blaa020
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Amphibia, crania, disparity, morphology, phenotypic integration
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
URI: https://discovery.ucl.ac.uk/id/eprint/10097602
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