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Published on: November 21, 2012
Embryological development of Salvator merianae (Squamata: Teiidae)
Josefina L Iungman1,2, María N Molinero1, Melina S Simoncini1,2
1Proyecto Yacaré - Laboratorio de Zoología Aplicada: Anexo Vertebrados, Facultad de Humanidades y Ciencias-Universidad Nacional del Litoral/Ministerio de Medio Ambiente, Santa Fe, Santa Fe, Argentina.
Abstract:
Here we describe the embryonic development of Salvator merianae external morphologic features, as based on observation of 28 embryos across different days of incubation at 31 ± 0.5°C. Observed developmental stages were grouped and classified into the early, middle, and late periods. The early period (Stages 3-11) is distinguished by the origin of the encephalic vesicles, sensory placodes, pharyngeal arches, and degree of body flexion and rotation. The medium period (Stages 8-15) is distinguished by limb differentiation and by cranium-facial characteristics. The late period (Stages 15-18) is determined by scale patterns, pigmentation, and embryo growth.
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