Project 3732: Y. Rollot, S. W. Evers, W. G. Joyce. 2021. A review of the carotid artery and facial nerve canal systems in extant turtles. PeerJ. 8:e10475.
Specimen: Apalone spinifera (FMNH/22178)
View: 3D model of basisphenoid

Abstract

The cranial circulation and innervation systems of turtles have been studied for more than two centuries and extensively used to understand turtle systematics. Although a significant number of studies related to these structures exists, a broader comprehension of variation across the tree has been hindered by poor sampling and a lack of synthetic studies that addressed both systems together. We here provide new insights regarding the carotid circulation and facial nerve innervation systems in a broad set of extant turtles using CT (computed tomography) scans, which allow us to trace the canals these structures form in bone and understand the interaction between both systems. We document that the palatine artery, including the lateral carotid canal, is absent in all pleurodires and carettochelyids and was likely reduced or lost several times independently within Testudinoidea. We also highlight osteological correlates for the location of the mandibular artery. We finally summarize variation regarding the placement of the mandibular artery, location of the geniculate ganglion, placement of the hyomandibular and vidian nerves, and situations where we recommend caution when assessing canals in fossils. A morphometric study confirms that the relative sizes of the carotid canals are correlated with one another. Our results have the potential for building new phylogenetic characters and investigating the circulation systems of fossil taxa, which are expected to shed light on the evolution of the circulation system of turtles and clarify some unresolved relationships between fossil turtle clades.


Read the article »

Article DOI: 10.7717/peerj.10475

Project DOI: 10.7934/P3732, http://dx.doi.org/10.7934/P3732
This project contains
  • 42 Media
  • 14 Taxa
  • 14 Specimens
Total size of project's media files: 569.53M

Download Project SDD File
Currently Viewing:
MorphoBank Project 3732

    Authors' Institutions

    • Universit√© de Fribourg (University of Fribourg)



    Members

    member name taxa specimens media
    Yann Rollot
    Project Administrator
    141442
    Serjoscha Evers
    Full membership
    000
    Walter Joyce
    Full membership
    000


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views14710
    Project overview607
    Media views8165Media search (1096 views); M688077 (178 views); M688082 (179 views); M688085 (186 views); M688076 (174 views); M688078 (172 views); M688079 (171 views); M688080 (173 views); M688081 (182 views); M688083 (169 views); M688084 (168 views); M688086 (172 views); M688087 (179 views); M688088 (160 views); M688089 (170 views); M688090 (164 views); M688091 (171 views); M688092 (164 views); M688093 (172 views); M688094 (165 views); M688095 (169 views); M688096 (172 views); M688097 (159 views); M688098 (176 views); M688099 (170 views); M688100 (162 views); M688101 (169 views); M688102 (162 views); M688103 (152 views); M688104 (171 views); M688105 (172 views); M688106 (165 views); M688107 (162 views); M688108 (172 views); M688109 (157 views); M688110 (168 views); M688111 (169 views); M688112 (157 views); M688113 (164 views); M688114 (175 views); M688115 (167 views); M688116 (149 views); M688117 (161 views);
    Bibliography269
    Views for media list385
    Specimen list3528
    Taxon list1748
    Documents list8




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project103
    Project downloads90
    Media downloads13M688077 (2 downloads); M688109 (1 download); M688076 (2 downloads); M688078 (1 download); M688079 (1 download); M688080 (1 download); M688105 (1 download); M688112 (1 download); M688114 (2 downloads); M688117 (1 download);