Data/hora: 09/06/2024 09:30:03

Provedor de dados: | 104
País: | Brazil
Título: | Light and electron microscopy study of late embryonic development in the land snail Limicolaria flammea (Müller) (Pulmonata, Achatinidae)
Autores: | Egonmwan,Rosemary I.
Data: | 2007-06-01
Ano: | 2007
Palavras-chave: | Cephalic sac; Embryo; Embryonic shell; Foot; Podocyst.
Resumo: | The late stages of embryogenesis in the achatinid land snail Limicolariaflammea (Müller, 1774) were described using light and electron microscopy. Embryos at various stages of development were present in the eggs during the first hour after they were laid, from 4-cell blastulae to morulae and fairly advanced stages. The advanced embryo which was fully developed on the second day bears a long cephalic sac, first to be developed, attached to the embryo and a podocyst which is attached to the foot of the embryo. Both of these structures are reduced in size as embryogenesis progresses until they finally disappear at about the 7th day after the egg was deposited. The embryonic shell was apparent on the second day and spiral coiling was apparent at about day 5. The spiral shell had one whorl when formed and more spirals were added so that at hatching the young snails had three whorls.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200022
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S0101-81752007000200022
Formato: | text/html
Fonte: | Revista Brasileira de Zoologia  v.24 n.2 2007
Fonte: | info:eu-repo/semantics/openAccess