Acta Ichthyologica et Piscatoria 47(4): 385-389, doi: 10.3750/AIEP/02226
The first record of diprosopus tetrophthalmus in the South Atlantic Ocean: The case of Prionace glauca (Elasmobranchii: Carcharhiniformes: Carcharhinidae) in Brazil
F. Lamarca, N. Ribeiro, F. Galheigo, M. ViannaCorresponding author: F. Lamarca © F. Lamarca, N. Ribeiro, F. Galheigo, M. Vianna. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Lamarca F, Ribeiro N, Galheigo F, Vianna M (2017) The first record of diprosopus tetrophthalmus in the South Atlantic Ocean: The case of Prionace glauca (Elasmobranchii: Carcharhiniformes: Carcharhinidae) in Brazil. Acta Ichthyologica et Piscatoria 47(4): 385-389. https://doi.org/10.3750/AIEP/02226 |  |
Abstract
The majority of morphological abnormalities reported for elasmobranchs are cases of bicephalia. This contribution describes the third confirmed case worldwide and the first in the South Atlantic of diprosopus tetrophthalmus (craniofacial duplication) in a foetus of blue shark, Prionace glauca (Linnaeus, 1758), from a female caught off the Brazilian coast (26°36′11′′S, 45°56′00′′W) in July 2007. The specimen is described and compared to normal specimens from the same size and to another one with similar deformities from Chile. The embryo is smaller than a normal embryo, with deformities in the skull, head muscles and curvature of the vertebral column.
Keywords
anomaly, blue shark, embryo, malformation, South Atlantic