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Volume 45 - Suppl. 1 - 2010


Osteology of Hippoglossina macrops (Pleuronectiformes, Paralichthyidae)

Héctor Flores1 y Eduardo de la Hoz2†

1Departamento de Acuicultura, Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo, Chile

2Laboratorio de Morfología Funcional Animal, Instituto de Biología, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2950, Valparaíso, Chile

Fallecido en 1997




An osteological description of Hippoglossina macrops, a flounder found in the Southeast Pacific, is presented. Specimens between 11 and 32 cm of total length, captured in the area of Valparaíso and Tomé (Chile) were analyzed. Observations were carried out from dissected specimens previously preserved in formalin and cleared and stained specimens for bone and cartilage. The osteological features of those specimens were then compared to H. montemaris. In general, the Hippoglossina macrops osteology have the features given for the suborder Pleuronectoidei, showing diagnostic characters of Paralichthyidae, such as a supra occipital crest inclined towards the nadiral side; metapterygoid related to the upper edge of the quadrate by cartilage and to the rear end by the hyosimplectic cartilage; subopercle with a subsequent upward extension presenting on their sides not ossified surfaces which give uniformity to the bone; fourth abdominal bone in its portion shows a fusion of the first two anal pterygiophores, are among the most important ones. Within the Paralicthyidae family, H. macrops it shares characteristics with Pseudorhombus and Paralichthys. H. montemaris specimens do not show morphological differences with H. macrops, which questioned the validity of the species.

Key words: Fishes, flounder, skeleton


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