Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare

Little is known about the embryonic development and variation of the chondrocranium in Crocodylia and there are no works on any Caiman species. Due to the importance of cranial features in the systematics of this clade, investigating the development of the skull in embryonic stages is essential. In...

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Autor: Fernández Blanco, María Victoria
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/127165
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127165
Access Level:acceso abierto
Palabra clave:Biología
Zoología
Embryonic stages
Laryngeal cartilages
Morphological variation
Neurocranium
Ontogeny
Skull
Splanchnocranium
Trachea
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spelling Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacareFernández Blanco, María VictoriaBiologíaZoologíaEmbryonic stagesLaryngeal cartilagesMorphological variationNeurocraniumOntogenySkullSplanchnocraniumTracheaLittle is known about the embryonic development and variation of the chondrocranium in Crocodylia and there are no works on any Caiman species. Due to the importance of cranial features in the systematics of this clade, investigating the development of the skull in embryonic stages is essential. In this study, we present for the first time the development of the cartilaginous skull of two extant Caiman species. Anatomical descriptions of the embryonic chondrocranium of Caiman latirostris and Caiman yacare were made, paying special attention to their inter- and intraspecific variation. For this purpose, pre-hatching ontogenetic cranial series of these two caiman species were prepared with a double staining and diaphanization technique. The main differences with other crocodylian species were observed in the palatoquadrate, and interspecific variation within the genus was recorded in the hyobranchial apparatus and larynx. Some characters may be distinctive of Caiman (posterior and ventral surface of the otic process of the palatoquadrate articulated with the dorsal process of the columella auris, and otic process articulated with the lateral wall of the auditory capsule), Alligatoridae (presence of an epiphanial foramen) or C. latirostris and C. yacare (Corpus hyoidei with different number and position of foramina and different shapes of its anterior contour and anterior and posterior notch, different degrees of broadening of the distal end of the Cornu branchiale I, and presence/absence of a notch in the posteroventral surface of the cricoid). Homologies of the elements belonging to the hyobranchial apparatus could not be confirmed. As in other tetrapods the trachea consists of incomplete cartilaginous rings. Morphological changes and dissimilarities found in this study are useful as a context to start studying phylogenetic constraints. Moreover, in a heterochronic context, variations may be involved.Facultad de Ciencias Naturales y Museo2019-03-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf899-916http://sedici.unlp.edu.ar/handle/10915/127165enginfo:eu-repo/semantics/altIdentifier/issn/1469-7580info:eu-repo/semantics/altIdentifier/issn/0021-8782info:eu-repo/semantics/altIdentifier/pmid/30861120info:eu-repo/semantics/altIdentifier/doi/10.1111/joa.12968info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:09:17Zoai:sedici.unlp.edu.ar:10915/127165Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:09:17.764SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
title Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
spellingShingle Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
Fernández Blanco, María Victoria
Biología
Zoología
Embryonic stages
Laryngeal cartilages
Morphological variation
Neurocranium
Ontogeny
Skull
Splanchnocranium
Trachea
title_short Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
title_full Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
title_fullStr Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
title_full_unstemmed Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
title_sort Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare
dc.creator.none.fl_str_mv Fernández Blanco, María Victoria
author Fernández Blanco, María Victoria
author_facet Fernández Blanco, María Victoria
author_role author
dc.subject.none.fl_str_mv Biología
Zoología
Embryonic stages
Laryngeal cartilages
Morphological variation
Neurocranium
Ontogeny
Skull
Splanchnocranium
Trachea
topic Biología
Zoología
Embryonic stages
Laryngeal cartilages
Morphological variation
Neurocranium
Ontogeny
Skull
Splanchnocranium
Trachea
description Little is known about the embryonic development and variation of the chondrocranium in Crocodylia and there are no works on any Caiman species. Due to the importance of cranial features in the systematics of this clade, investigating the development of the skull in embryonic stages is essential. In this study, we present for the first time the development of the cartilaginous skull of two extant Caiman species. Anatomical descriptions of the embryonic chondrocranium of Caiman latirostris and Caiman yacare were made, paying special attention to their inter- and intraspecific variation. For this purpose, pre-hatching ontogenetic cranial series of these two caiman species were prepared with a double staining and diaphanization technique. The main differences with other crocodylian species were observed in the palatoquadrate, and interspecific variation within the genus was recorded in the hyobranchial apparatus and larynx. Some characters may be distinctive of Caiman (posterior and ventral surface of the otic process of the palatoquadrate articulated with the dorsal process of the columella auris, and otic process articulated with the lateral wall of the auditory capsule), Alligatoridae (presence of an epiphanial foramen) or C. latirostris and C. yacare (Corpus hyoidei with different number and position of foramina and different shapes of its anterior contour and anterior and posterior notch, different degrees of broadening of the distal end of the Cornu branchiale I, and presence/absence of a notch in the posteroventral surface of the cricoid). Homologies of the elements belonging to the hyobranchial apparatus could not be confirmed. As in other tetrapods the trachea consists of incomplete cartilaginous rings. Morphological changes and dissimilarities found in this study are useful as a context to start studying phylogenetic constraints. Moreover, in a heterochronic context, variations may be involved.
publishDate 2019
dc.date.none.fl_str_mv 2019-03-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/127165
url http://sedici.unlp.edu.ar/handle/10915/127165
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1469-7580
info:eu-repo/semantics/altIdentifier/issn/0021-8782
info:eu-repo/semantics/altIdentifier/pmid/30861120
info:eu-repo/semantics/altIdentifier/doi/10.1111/joa.12968
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
899-916
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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