Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)

The objective of this study was to characterize the external morphology of Salvator meriane embryos in different stages of embryonic development and establish a relationship with the ultrastructure of the shell from oviductal transit to hatching. A total of 120 embryos were analyzed to describe t...

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Autores principales: Arrieta, María Belén, Olea, Gabriela Beatriz, Rodríguez, Florencia Evelyn, Lombardo, Daniel Marcelo
Formato: Artículo
Lenguaje:Inglés
Publicado: John Wiley & Sons 2026
Materias:
Eggshell
Embryonic stage
Lizard
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/60072
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-60072
record_format dspace
spelling I48-R184-123456789-600722026-02-19T10:23:14Z Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae) Arrieta, María Belén Olea, Gabriela Beatriz Rodríguez, Florencia Evelyn Lombardo, Daniel Marcelo Eggshell Embryonic stage Lizard The objective of this study was to characterize the external morphology of Salvator meriane embryos in different stages of embryonic development and establish a relationship with the ultrastructure of the shell from oviductal transit to hatching. A total of 120 embryos were analyzed to describe their external morphology, and 78 eggs were used for the analysis of the shell. For embryonic development, the series was established according to the total length of the body. We established 40 embryonic stages from the primitive streak. In the early stages, the external morphological features are the C-shaped body, the maxillary, and mandibular fusion processes with the frontal process and the fusion of the forelimb with the digital plate. In the middle stages, the eyelid appears, and there are claws on the toes, cornification of fingers, and the onset of pigmentation. The last stage of embryonic development is characterized by the beginning of the formation of the scales, appear the toenails, and finalize the entire pigmentation. Regarding the relationship that exists with the ultrastructure of the egg during development, it was possible to observe a marked change in the composition of the shell and well-marked compaction during embryonic development, which may be related to the transport of calcium during embryonic ossification. Our results allowed us to show the complete sequence of embryonic development, determining the laying stage for this species. It was possible to establish a relationship with the ultrastructure of the eggshell from the oviductal transit to the moment of hatching. 2026-02-18T17:48:41Z 2026-02-18T17:48:41Z 2020 Artículo Arrieta, María Belén, et al., 1999. Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata: Teiidae). The Anatomical Record. Hoboken: John Wiley & Sons, vol. 304, no. 7, p. 1420-1438. E-ISSN 1932-8494. http://repositorio.unne.edu.ar/handle/123456789/60072 eng https://doi.org/10.1002/ar.24546 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 1420-1438. application/pdf John Wiley & Sons The Anatomical Record, 2020, vol. 304, no. 7, p. 1420-1438.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Eggshell
Embryonic stage
Lizard
spellingShingle Eggshell
Embryonic stage
Lizard
Arrieta, María Belén
Olea, Gabriela Beatriz
Rodríguez, Florencia Evelyn
Lombardo, Daniel Marcelo
Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)
topic_facet Eggshell
Embryonic stage
Lizard
description The objective of this study was to characterize the external morphology of Salvator meriane embryos in different stages of embryonic development and establish a relationship with the ultrastructure of the shell from oviductal transit to hatching. A total of 120 embryos were analyzed to describe their external morphology, and 78 eggs were used for the analysis of the shell. For embryonic development, the series was established according to the total length of the body. We established 40 embryonic stages from the primitive streak. In the early stages, the external morphological features are the C-shaped body, the maxillary, and mandibular fusion processes with the frontal process and the fusion of the forelimb with the digital plate. In the middle stages, the eyelid appears, and there are claws on the toes, cornification of fingers, and the onset of pigmentation. The last stage of embryonic development is characterized by the beginning of the formation of the scales, appear the toenails, and finalize the entire pigmentation. Regarding the relationship that exists with the ultrastructure of the egg during development, it was possible to observe a marked change in the composition of the shell and well-marked compaction during embryonic development, which may be related to the transport of calcium during embryonic ossification. Our results allowed us to show the complete sequence of embryonic development, determining the laying stage for this species. It was possible to establish a relationship with the ultrastructure of the eggshell from the oviductal transit to the moment of hatching.
format Artículo
author Arrieta, María Belén
Olea, Gabriela Beatriz
Rodríguez, Florencia Evelyn
Lombardo, Daniel Marcelo
author_facet Arrieta, María Belén
Olea, Gabriela Beatriz
Rodríguez, Florencia Evelyn
Lombardo, Daniel Marcelo
author_sort Arrieta, María Belén
title Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)
title_short Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)
title_full Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)
title_fullStr Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)
title_full_unstemmed Ultrastructure of eggshell and embryological development of Salvator merianae (Squamata : Teiidae)
title_sort ultrastructure of eggshell and embryological development of salvator merianae (squamata : teiidae)
publisher John Wiley & Sons
publishDate 2026
url http://repositorio.unne.edu.ar/handle/123456789/60072
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AT rodriguezflorenciaevelyn ultrastructureofeggshellandembryologicaldevelopmentofsalvatormerianaesquamatateiidae
AT lombardodanielmarcelo ultrastructureofeggshellandembryologicaldevelopmentofsalvatormerianaesquamatateiidae
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