NMITA:Neogene Marine Biota of Tropical America



Harengula jaguana (Poey, 1865)



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: oblong to fusiform;
    Ventral margin: gently rounded, dentate or irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Posterior margin: rounded and irregular;
    Dorsal depression: oblong;
    Crista inferior: ridge-like and curved under the cauda, well developed under ostium;
    Crista superior: ridge-like and curved over the cauda, poor over ostium, absent at tip;
    Collum: absent;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Cauda: short, oval, poorly defined posteriorly;
    Ostium: narrow and large;
    Pseudocolliculum: absent;
    Excisura: moderately wide, notch depth, angle acute;
    Antirostrum: short and pointed;
    Rostrum: large and pointed;
    Ventral depression: small and shallow below ridge;
    Colliculum: homomorph;
    Dorsal margin sculpture: slightly irregular in middle;
    Thickness: moderately thin;
    Form: -Mesial slightly convex;
    Dorsal margin: approximately straight, angled to rostrum;
    Form: -Lateral slightly convex;
Distribution:
    Late Miocene: Tuira Fm., Darien, Panama;

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