Ontogenia dos ossos da cintura peitoral e membros torácicos em embriões de podocnemis unifilis
Carregando...
Data
2016-12
Título da Revista
ISSN da Revista
Título de Volume
Editor
Vera Lúcia Gomes-Klein
Resumo
The Testudines represent a small group that combines primitive and derived aspects, for
example, in the skeleton of its members. To describe the ontogeny of the skeleton of the pectoral girdle
and thoracic members of Podocnemis unifilis, 66 embryos were cleared. On the other side, the bones
were stained to analyze the sequence of formation of their skeleton, which begins by the humerus, radius
and ulna bones, by stage 20, all the bones of the pectoral girdle with colored centers of ossification at
the end of this stage, in the same period when metacarpals also ossify, first by MCIV and MCIII, followed
for bones MCII>MCI>MCV. Between stage 21 and 22, all phalanges have centers of ossification marked
with alizarin; first the medial and distal phalanges, and finally the proximal phalanges. Only at the start
of stage 24, the carpal ossification begins, first with the intermediate carpal bone, the distal carpal
IV and central carpal III, followed by 25 others, where the pisiform is the last to make its center of
ossification. The chronology of ontogenic events in different species of reptiles may differ substantially,
but the pattern in P. unifilis is similar to the other Testudines.
Descrição
Palavras-chave
Esqueleto, Ossificação, Répteis, Tracajá, Skeleton, Ossification, Reptiles, Yellow-spotted Amazon river turtle
Citação
LIMA, Fabiano Campos; SANTOS, André Luiz Quagliatto; RITA, Ricardo de Mattos Santa; SABEC-PEREIRA, Dayane Kelly; VIEIRA, Lucélia Gonçalves; SILVA JUNIOR, Luiz Martins da; SARZENSKI, Taiz Malysz; RODRIGUES, Arthur Perillo; CABRAL, Priscila Araújo; PEREIRA, Kleber Fernando. Ontogenia dos ossos da cintura peitoral e membros torácicos em embriões de podocnemis unifilis. Biologia Neotropical, Goiânia, v. 13, n. 2, p. 276-284, jul./dez. 2016. Disponível em: <https://www.revistas.ufg.br/RBN/article/view/31394/22499>.