Abstract

NAVARRO ACOSTA, Grisel  and  VERA CANDIOTI, Florencia. Alometría y heterocronías durante el desarrollo temprano de cinco especies de Hypsiboas (Anura: Hylidae). Cuad. herpetol. [online]. 2017, vol.31, n.1, pp.11-22. ISSN 1852-5768.

Interesting structural and temporal variations have been reported in embryonic stages of different anuran groups. However, knowledge of the contribution of allometry and temporal patterns to the morphological change during ontogeny remains limited. We studied the early development of five species of Hypsiboas (Anura: Hylidae), in order to explore heterochronic changes during the sequence of events in the development of some embryonic and larval characters, and interspecific shape-size relationships. Ontogenetic series were analyzed using multivariate methods and sequence heterochrony approach. The results show variations in morphology and in the developmental sequence of the considered characters, in some cases in relation with the oviposition mode of the studied species. The relationship between shape, size, and the events that define developmental stages varies interspecifically and reveals a decoupling between some characters which result in embryos with different morphologies. This paper provides information and new questions towards a better understanding of the evolution of anuran development and variation in patterns and processes across different lineages.

Keywords : Geometric morphometrics; Ontogeny; Sequence heterochrony; Shape; Size.

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