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 in Salamandra 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: 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: 14558


    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 views14558
    Project overview716
    Media views12807Media search (725 views); M434546 (115 views); M434547 (97 views); M434575 (103 views); M434571 (130 views); M434567 (102 views); M434621 (107 views); M434583 (108 views); M434631 (98 views); M434589 (160 views); M434617 (157 views); M434584 (110 views); M434594 (119 views); M434619 (104 views); M434627 (96 views); M434632 (127 views); M434568 (107 views); M434641 (103 views); M434548 (113 views); M434557 (102 views); M434634 (112 views); M434596 (125 views); M434640 (127 views); M434645 (94 views); M434551 (112 views); M434604 (109 views); M434565 (94 views); M434625 (120 views); M434628 (115 views); M434558 (105 views); M434644 (101 views); M434562 (120 views); M434616 (103 views); M434559 (112 views); M434633 (92 views); M434598 (90 views); M434555 (107 views); M434637 (109 views); M434599 (94 views); M434560 (102 views); M434573 (102 views); M434620 (108 views); M434564 (111 views); M434618 (115 views); M434570 (119 views); M434588 (100 views); M434601 (87 views); M434639 (102 views); M434624 (100 views); M434626 (107 views); M434600 (107 views); M434638 (94 views); M434592 (95 views); M434566 (83 views); M434610 (123 views); M434572 (112 views); M434556 (129 views); M434609 (96 views); M434593 (111 views); M434582 (102 views); M434613 (106 views); M434553 (98 views); M434577 (143 views); M434591 (126 views); M434636 (112 views); M434549 (124 views); M434622 (100 views); M434580 (120 views); M434629 (113 views); M434597 (104 views); M434603 (97 views); M434554 (107 views); M434612 (114 views); M434643 (111 views); M434574 (104 views); M434581 (132 views); M434611 (111 views); M434578 (113 views); M434614 (108 views); M434586 (124 views); M434630 (112 views); M434605 (126 views); M434569 (128 views); M434590 (90 views); M434635 (111 views); M434642 (112 views); M434579 (110 views); M434561 (101 views); M434615 (118 views); M434595 (112 views); M434552 (129 views); M434608 (107 views); M434606 (104 views); M434661 (53 views); M434650 (73 views); M434607 (127 views); M434550 (102 views); M434602 (100 views); M434587 (111 views); M434585 (97 views); M434563 (110 views); M434649 (51 views); M434623 (104 views); M434576 (132 views); M434646 (50 views); M434647 (51 views); M434648 (46 views); M434651 (56 views); M434652 (55 views); M434653 (59 views); M434654 (60 views); M434655 (48 views); M434656 (57 views); M434657 (54 views); M434658 (43 views); M434659 (58 views); M434660 (42 views); M434662 (50 views); M434663 (46 views); M434664 (67 views); M434665 (49 views);
    Specimen list398
    Taxon list254
    Bibliography132
    Views for media list250
    Documents list1




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project68
    Project downloads68