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


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,
This project contains
  • 120 Media
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 827.05M

Download Project SDD File
Currently Viewing:
MorphoBank Project 2569
  • Creation Date:
    29 November 2016
  • Publication Date:
    30 March 2017
  • Project views: 28624

    Authors' Institutions

    • Universidad de Oviedo

    • Universidade do Porto (CIBIO included)


    member name taxa specimens media media
    Lucia Alarcon-Rios
    Project Administrator

    Project has no matrices defined.

    Project views

    type number of views Individual items viewed (where applicable)
    Total project views28624
    Project overview1478
    Media views24655Media search (1686 views); M434546 (229 views); M434547 (222 views); M434575 (212 views); M434571 (250 views); M434567 (215 views); M434621 (200 views); M434583 (220 views); M434631 (176 views); M434589 (259 views); M434617 (240 views); M434584 (214 views); M434594 (204 views); M434619 (187 views); M434627 (175 views); M434632 (216 views); M434568 (219 views); M434641 (182 views); M434548 (228 views); M434557 (226 views); M434634 (197 views); M434596 (210 views); M434640 (223 views); M434645 (186 views); M434551 (242 views); M434604 (186 views); M434565 (211 views); M434625 (209 views); M434628 (194 views); M434558 (226 views); M434644 (191 views); M434562 (235 views); M434616 (177 views); M434559 (221 views); M434633 (181 views); M434598 (172 views); M434555 (231 views); M434637 (185 views); M434599 (188 views); M434560 (223 views); M434573 (214 views); M434620 (193 views); M434564 (224 views); M434618 (202 views); M434570 (241 views); M434588 (198 views); M434601 (167 views); M434639 (174 views); M434624 (184 views); M434626 (202 views); M434600 (187 views); M434638 (168 views); M434592 (186 views); M434566 (194 views); M434610 (206 views); M434572 (233 views); M434556 (245 views); M434609 (183 views); M434593 (210 views); M434582 (212 views); M434613 (199 views); M434553 (214 views); M434577 (253 views); M434591 (216 views); M434636 (193 views); M434549 (267 views); M434622 (180 views); M434580 (242 views); M434629 (202 views); M434597 (186 views); M434603 (180 views); M434554 (216 views); M434612 (192 views); M434643 (200 views); M434574 (218 views); M434581 (235 views); M434611 (189 views); M434578 (227 views); M434614 (185 views); M434586 (226 views); M434630 (202 views); M434605 (212 views); M434569 (243 views); M434590 (180 views); M434635 (188 views); M434642 (195 views); M434579 (224 views); M434561 (211 views); M434615 (200 views); M434595 (194 views); M434552 (243 views); M434608 (190 views); M434606 (196 views); M434661 (108 views); M434650 (126 views); M434607 (214 views); M434550 (223 views); M434602 (182 views); M434587 (231 views); M434585 (224 views); M434563 (230 views); M434649 (107 views); M434623 (195 views); M434576 (244 views); M434646 (107 views); M434647 (103 views); M434648 (104 views); M434651 (110 views); M434652 (108 views); M434653 (113 views); M434654 (111 views); M434655 (98 views); M434656 (108 views); M434657 (107 views); M434658 (99 views); M434659 (111 views); M434660 (96 views); M434662 (106 views); M434663 (97 views); M434664 (121 views); M434665 (103 views);
    Specimen list867
    Taxon list758
    Views for media list535
    Documents list2

    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project155
    Project downloads155