A case of tetrophthalmia with unilateral synophthalmia in an unborn fetus of blue shark Prionace glauca (Carcharhiniformes, Carcharhinidae)
DOI:
https://doi.org/10.22370/rbmo.2018.53.0.1251Keywords:
Chondrichthyes, Orbital malformations, Conjoined twins, Bycatch, EmbryogenesisAbstract
This study describes and classifies a case of multiple malformations in an unborn blue shark Prionace glauca fetus, which was extracted from a gravid female captured during a research campaign addressed to the biological study of sharks in northern and central Chile. The analyzed specimen shows tetrophthalmia with unilateral synophthalmia, anomaly characterized by the existence of 4 ocular globes, two of which are partially fused. In addition, the axial skeleton of the fetus shows thoracic lordosis and helical torsion in the abdominal-caudal portion. This is the first world report of tetrophthalmia with unilateral synophthalmia in chondrichthyans.
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Copyright (c) 2018 Víctor Pastén-Marambio, Valentina Hevia-Hormazábal, Enzo Acuña, Alonso Vega
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