NMITA:Neogene Marine Biota of Tropical America



Orthopristis aff. ruber (Cuvier, 1830)



Specimen details:
 Sample Number: PPP1137
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Darien, Darien, Panama

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Morphologic Description:

    Otolith shape: approximately oval;
    Thickness: moderately thick;
    Form: -Mesial convex;
    Form: -Lateral concave;
    Dorsal margin: rounded;
    Dorsal margin sculpture: irregular;
    Ventral margin: well rounded and slightly irregular;
    Posterior margin: oblique, rounded and slightly irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, low anterior and indistinct posterior colliculi;
    Pseudocolliculum: absent;
    Ostium: rectangular and straight;
    Cauda: large and narrow, strongly curved posteriorly, tip very close to ventral margin;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: well developed over the entire sulcus;
    Crista inferior: well developed under entire sulcus;
    Dorsal depression: absent;
    Ventral depression: absent;
    Rostrum: short, broad and rounded;
    Antirostrum: minute and sharply rounded;
    Excisura: moderately wide;
Distribution:
    Late Miocene: Tuira Fm., Darien, Panama;

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