NMITA:Neogene Marine Biota of Tropical America



Atherinomorus stipes (Muller & Trotshel, 1848)



Specimen details:
 Sample Number: PPP1285
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 to circular;
    Thickness: moderately thick;
    Form: -Mesial convex;
    Form: -Lateral slightly concave;
    Dorsal margin: rounded;
    Dorsal margin sculpture: lobed;
    Ventral margin: rounded and irregular to crenate;
    Posterior margin: rounded and irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, very low, indistinct colliculi;
    Pseudocolliculum: absent;
    Ostium: short, discoid, ventral wall distinctly bulbous;
    Cauda: slightly sinuous with ventral flexion at tip;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: well developed along entire sulcus;
    Crista inferior: well developed along entire sulcus;
    Dorsal depression: absent;
    Ventral depression: absent;
    Rostrum: broad and pointed;
    Antirostrum: small and pointed;
    Excisura: moderate, notch very shallow, angle acute;
Distribution:
    Early Pleistocene: Colon island, Bocas del Toro, Panama;

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