1. Ontogeny of the skull of the Black Caiman (Melanosuchus niger) (Crocodylia: Alligatoridae)
- Author
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Lucélia Gonçalves Vieira, Juliana dos Santos Mendonça, André L. Santos, Antonio Sebben, Lorena Tannús Menezes-Reis, L. Q. L. Hirano, Universidade Federal de Goiânia (UFG), Universidade Federal de Uberlândia (UFU), Universidade de Brasília (UnB), and Universidade Estadual Paulista (Unesp)
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0106 biological sciences ,Ontogeny ,Ossification ,010603 evolutionary biology ,01 natural sciences ,Chondrocranium ,03 medical and health sciences ,Melanosuchus niger ,medicine ,Alligatoridae ,Black Caiman ,Ecology, Evolution, Behavior and Systematics ,030304 developmental biology ,0303 health sciences ,biology ,Anatomy ,biology.organism_classification ,Skull ,medicine.anatomical_structure ,Embryo ,Animal Science and Zoology ,medicine.symptom ,Clearance - Abstract
Made available in DSpace on 2019-10-06T15:33:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01 Instituto Chico Mendes de Conservação da Biodiversidade Universidade Federal de Uberlândia We describe the formation of the chondrocranium and the ossification pattern of the skull of the Black Caiman (Melanosuchus niger (Spix, 1825)). The embryos were cleared and double-stained with Alizarin Red S and Alcian Blue 8GX. Additionally, they were visualized by histological hematoxylin and eosin staining and computed tomography imaging. The chondrocranium of M. niger comprised the nasal capsule, orbitotemporal, and optic–occipital regions. Its development began at stage 9, with the chondrification of the acrochordal cartilage, trabeculae, and mandibular cartilage. The optic capsule was formed in the caudolateral portion of the chondrocranium at stage 13. The basal plate appeared at stage 14, with foramina for the hypoglossal. The chondrocranium was completely formed at stage 16. The first osteogenic events were noted at stage 13, in the bones, maxilla, jugal, postorbital, and pterygoid. The quadratojugal, prefrontal, frontal, and squamosal began their ossification at stage 14. The parietal bone began to ossify only at stage 20. The basisphenoid began at stage 15 and the parasphenoid began at stage 16. The jaw bones ossified between stages 13 and 16. The dermal elements started their ossification prior to the endochondral bones. Instituto de Ciências Biológicas Universidade Federal de Goiânia (UFG), Chácaras Califórnia Faculdade de Medicina Veterinária Universidade Federal de Uberlândia (UFU), Avenida Pará, 1720 – Umuarama Faculdade de Agronomia e Medicina Veterinária Universidade de Brasília (UnB), ICC Sul Campos Universitário Darci Ribeiro – Sul, Brasília, Distrito Federal Instituto de Ciências Biomédicas Universidade Federal de Uberlândia (UFU), Avenida Pará 1720 – Bloco 2B – Sala 2B22, Caixa Postal 592 Instituto de Biociência Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Rua Cristóvão Colombo, 2265 – Jardim Nazareth Instituto de Ciências Biológicas Universidade de Brasília (UnB), UnB 1° andar – Asa Norte, Brasília, Distrito Federal Instituto de Biociência Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Rua Cristóvão Colombo, 2265 – Jardim Nazareth
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- 2019
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