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Two new otolith-based sciaenid species of the genus Plagioscion from South American Neogene marine sediments

Published online by Cambridge University Press:  20 May 2016

Orangel Aguilera  and
Dione Rodrigues De Aguilera
Orangel Aguilera
Affiliation:
1Universidad Nacional Experimental Francisco de Miranda, Centro de Investigaciones en Ciencias Básicas, Complejo Docente Los Perozos, Carretera Variante Sur, Coro 4101, Estado Falcón, Venezuela,
Dione Rodrigues De Aguilera
Affiliation:
1Universidad Nacional Experimental Francisco de Miranda, Centro de Investigaciones en Ciencias Básicas, Complejo Docente Los Perozos, Carretera Variante Sur, Coro 4101, Estado Falcón, Venezuela,
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Abstract

Two new Neogene South American croakers of the genus Plagioscion (Perciformes, Sciaenidae) from marine sediments, Plagioscion marinus and Plagioscion urumacoensis, are described. These are otoliths from the lower Miocene Castillo, Cantaure and upper Miocene Urumaco Formations of the Neogene Venezuelan basin, respectively. An additional undetermined fossil species of Plagioscion was also collected from the upper Miocene to lower Pliocene Cubagua Formation. Using the function total fish length = 13.7187 + 50.8399 ∗ Ln otolith size, the total length of P. marinus n. sp. is inferred to be from 6.05 to 38.1 cm, and for the specimens of P. urumacoensis n. sp. it is 63.3 cm. The length distribution of the fossil species overlaps the length distribution of the living freshwater species.

Type
Research Article
Information
Journal of Paleontology , Volume 77 , Issue 6 , November 2003 , pp. 1133 - 1138
Copyright
Copyright © The Paleontological Society 

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