Rostral anomaly in a juvenile Spiny Butterfly Ray Gymnura altavela (Linnaeus, 1758) (Elasmobranchii: Myliobatiformes: Gymnuridae) from the Canary Islands

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Filip Osaer
Krupskaya Narváez


The present communication documents the first observation of a morphologic anomaly in a juvenile Spiny Butterfly Ray Gymnura altavela. This observation is remarkable for its similarity with a rostral abnormality in an adult G. altavela from the Canary Islands 10 years earlier and with the one from a juvenile Long-tailed Butterfly Ray G. poecilura from the Western Indo-Pacific. We could not find evidence that these instances present priority conservation concerns at present. However, long-term studies are required to monitor dynamic changes in such occurrences, evaluating their potential impact on the population.

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Osaer, F. and Narváez, K. 2018. Rostral anomaly in a juvenile Spiny Butterfly Ray Gymnura altavela (Linnaeus, 1758) (Elasmobranchii: Myliobatiformes: Gymnuridae) from the Canary Islands. Journal of Threatened Taxa. 10, 9 (Aug. 2018), 12280–12281. DOI:


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