The first record of diprosopus tetrophthalmus in the South Atlantic Ocean: The case of Prionace glauca (Elasmobranchii: Carcharhiniformes: Carcharhinidae) in Brazil

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 (Linna...

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Bibliographic Details
Published in:Acta Ichthyologica et Piscatoria
Main Authors: F. Lamarca, N. Ribeiro, F. Galheigo, M. Vianna
Format: Article in Journal/Newspaper
Language:English
Published: Pensoft Publishers 2017
Subjects:
anomaly
blue shark
embryo
malformation
South A
Aquaculture. Fisheries. Angling
SH1-691
South Atlantic Ocean
Online Access:https://doi.org/10.3750/AIEP/02226
https://doaj.org/article/0421be016e3b4594bc41eff77069dbf3
Description
Summary: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.

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