NMITA:Neogene Marine Biota of Tropical America



Anchoa sp.1



Specimen details:
 Sample Number: PPP2243
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: oval;
    Thickness: moderately thin;
    Form: -Mesial slightly convex;
    Form: -Lateral slightly convex;
    Dorsal margin: rounded;
    Dorsal margin sculpture: slightly irregular;
    Ventral margin: rounded and serrated, with numerous denticles;
    Posterior margin: sharply rounded, serrate and irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: homomorph;
    Pseudocolliculum: absent;
    Ostium: oval and large;
    Cauda: short, oval, poorly defined posteriorly;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: well developed ridge-like over sulcus, except in the cauda tip;
    Crista inferior: well developed ridge-like under sulcus, except in the cauda tip;
    Dorsal depression: very shallow;
    Ventral depression: small and shallow below ridge;
    Rostrum: large and rounded;
    Antirostrum: small and rounded;
    Excisura: wide, notch shallow, angles acute;
Distribution:
    Plio. / Pleistocene to Plio. / Pleistocene: Cayo Zapatilla island, Bocas del Toro, Panama;

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