Project 2569: L. Alarcón-Ríos, G. Velo-Antón, A. Kaliontzopoulou. 2017. A non-invasive geometric morphometrics method for exploring variation in dorsal head shape in urodeles: sexual dimorphism and geographic variation inSalamandra salamandra. Journal of Morphology. 278 (4):475-485.
Specimen: Salamandra salamandra gallaica (unvouchered)
View: Dorsal

Abstract

The study of morphological variation among and within taxa can shed light on the evolution of phenotypic diversification. In the case of urodeles, the dorso-ventral view of the head captures most of the ontogenetic and evolutionary variation of the entire head, which is a structure with a high potential for being a target of selection due to its relevance in ecological and social functions. Here, we describe a non-invasive procedure of geometric morphometrics for exploring morphological variation in the external dorso-ventral view of urodeles’ head. To explore the accuracy of the method and its potential for describing morphological patterns we applied it to two populations of Salamandra salamandra gallaica from NW Iberia. Using landmark-based geometric morphometrics, we detected differences in head shape between populations and sexes, and an allometric relationship between shape and size. We also determined that not all differences in head shape are due to size variation, suggesting intrinsic shape differences across sexes and populations. These morphological patterns had not been previously explored in S. salamandra, despite the high levels of intraspecific diversity within this species. The methodological procedure presented here allows to detect shape variation at a very fine scale, and solves the drawbacks of using cranial samples, thus increasing the possibilities of using collection specimens and alive animals for exploring dorsal head shape variation and its evolutionary and ecological implications in urodeles.


Read the article »

Article DOI: 10.1002/jmor.20643

Project DOI: 10.7934/P2569, http://dx.doi.org/10.7934/P2569
This project contains
  • 120 Media
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 892 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 2569
  • Creation Date:
    29 November 2016
  • Publication Date:
    30 March 2017
  • Project views: 19348

    Authors' Institutions

    • Universidad de Oviedo

    • Universidade do Porto



    Members

    member name taxa specimens media media
    notes
    Lucía Alarcón-Ríos
    Project Administrator
    Last logged in 03/30/17
    111200


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views19348
    Project overview1050
    Media views16710Media search (1053 views); M434546 (157 views); M434547 (140 views); M434575 (141 views); M434571 (173 views); M434567 (145 views); M434621 (135 views); M434583 (147 views); M434631 (122 views); M434589 (189 views); M434617 (184 views); M434584 (145 views); M434594 (144 views); M434619 (131 views); M434627 (122 views); M434632 (158 views); M434568 (146 views); M434641 (128 views); M434548 (153 views); M434557 (145 views); M434634 (142 views); M434596 (150 views); M434640 (159 views); M434645 (124 views); M434551 (158 views); M434604 (135 views); M434565 (131 views); M434625 (149 views); M434628 (140 views); M434558 (149 views); M434644 (131 views); M434562 (165 views); M434616 (126 views); M434559 (150 views); M434633 (119 views); M434598 (117 views); M434555 (147 views); M434637 (133 views); M434599 (123 views); M434560 (143 views); M434573 (142 views); M434620 (136 views); M434564 (151 views); M434618 (144 views); M434570 (159 views); M434588 (130 views); M434601 (111 views); M434639 (127 views); M434624 (126 views); M434626 (137 views); M434600 (132 views); M434638 (119 views); M434592 (120 views); M434566 (118 views); M434610 (151 views); M434572 (149 views); M434556 (170 views); M434609 (125 views); M434593 (139 views); M434582 (139 views); M434613 (136 views); M434553 (143 views); M434577 (178 views); M434591 (152 views); M434636 (139 views); M434549 (172 views); M434622 (126 views); M434580 (158 views); M434629 (141 views); M434597 (132 views); M434603 (123 views); M434554 (144 views); M434612 (139 views); M434643 (141 views); M434574 (141 views); M434581 (167 views); M434611 (137 views); M434578 (149 views); M434614 (132 views); M434586 (158 views); M434630 (137 views); M434605 (154 views); M434569 (166 views); M434590 (116 views); M434635 (136 views); M434642 (141 views); M434579 (149 views); M434561 (140 views); M434615 (145 views); M434595 (138 views); M434552 (167 views); M434608 (134 views); M434606 (131 views); M434661 (69 views); M434650 (90 views); M434607 (156 views); M434550 (145 views); M434602 (128 views); M434587 (151 views); M434585 (140 views); M434563 (153 views); M434649 (69 views); M434623 (133 views); M434576 (173 views); M434646 (69 views); M434647 (68 views); M434648 (63 views); M434651 (72 views); M434652 (72 views); M434653 (77 views); M434654 (75 views); M434655 (61 views); M434656 (74 views); M434657 (69 views); M434658 (59 views); M434659 (73 views); M434660 (59 views); M434662 (65 views); M434663 (63 views); M434664 (83 views); M434665 (65 views);
    Specimen list564
    Taxon list475
    Bibliography203
    Views for media list346




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project102
    Project downloads102