NMITA:Neogene Marine Biota of Tropical America

Plagioscion sp.1

Specimen details:
Sample Number: PPP3093
Type Status: nontype
Scale Bar is 1 mm
Type: light
Orientation: mesial
Locality: Cubagua, Cubagua, Venezuela

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Morphologic Description:

    Otolith shape: sub-rectangular;
    Thickness: very thick;
    Form: -Mesial convex;
    Form: -Lateral convex, with a strong nodules or tubercles;
    Dorsal margin: slightly straight;
    Dorsal margin sculpture: slightly irregular;
    Ventral margin: slightly rounded;
    Posterior margin: straight and oblique;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, low anterior and indistinct posterior colliculi;
    Pseudocolliculum: absent;
    Ostium: enlarged, inclined and sub-quadrangular;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: poorly developed over ostium, ridge-like over cauda;
    Crista inferior: poorly developed under ostium, moderately well developed under cauda;
    Dorsal depression: shallow and elongate;
    Ventral depression: absent;
    Rostrum: reduced;
    Antirostrum: rounded;
    Excisura: narrow, notch absent;
    Early Pliocene: Cubagua Fm., Cubagua, Venezuela;

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