Congenital Deformity in the Pectoral Fin of Hypanus guttatus (Myliobatiformes: Dasyatidae) Bruna Cabral Carneiro Batista, Alexandre Pires Marceniuk, Alex Garcia Cavalleiro de Macedo Klautau, Matheus Marcos Rotundo

Abstract

This study aimed to document and describe the morphology of a non-fused pectoral fin to the head in a female H. guttatus (Myliobatiformes: Dasyatidae) captured from the Amazonian coast in Pará, Brazil. The observed anomaly is linked to mutations in the orbital cartilage, nasal capsule, propterygium and its segments, but the exact causes remain undetermined. Further detailed investigations of anomalous embryos, incorporating genetic and ecotoxicological data, are essential. Additionally, ongoing monitoring of such cases is crucial for a comprehensive understanding of the nature and prevalence of this abnormality.