NMITA:Neogene Marine Biota of Tropical America

Otophidium robustum (Nolf & Stringer, 1992)

Specimen details:
Sample Number: PPP1188
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Bocas del Toro, Bocas del Toro, Panama

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Morphologic Description:

    Otolith shape: discoid;
    Thickness: slightly thin;
    Form: -Mesial slightly convex;
    Form: -Lateral flat;
    Dorsal margin: rounded;
    Dorsal margin sculpture: slightly irregular;
    Ventral margin: rounded;
    Posterior margin: rounded, becoming pointed and entire;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph and low;
    Pseudocolliculum: absent;
    Ostium: oblong, superficial and large;
    Cauda: elongate, slightly flexed ventrally;
    Ostio-caudal differentiation: ventrally slightly constricted;
    Collum: absent;
    Crista superior: poorly developed along entire sulcus;
    Crista inferior: poorly developed along entire sulcus;
    Dorsal depression: shallow and elongate;
    Ventral depression: very shallow and elongate;
    Rostrum: small and rounded;
    Antirostrum: short and rounded;
    Excisura: narrow, notch absent;
    Early Pliocene: Cayo Agua Fm., Bocas del Toro, Panama;

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