NMITA:Neogene Marine Biota of Tropical America



Engraulis sp.1



Specimen details:
 Sample Number: PPP2556
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Araya, Araya, Venezuela

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Morphologic Description:

    Otolith shape: elliptic;
    Ventral margin: approximately straight and irregular, with few denticles;
    Dorsal margin sculpture: slightly irregular;
    Excisura: moderately narrow, notch depth, angle acute;
    Antirostrum: short and pointed;
    Rostrum: large and pointed;
    Ventral depression narrow and shallow below ridge;
    Dorsal depression: narrow and shallow over ridge;
    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;
    Colliculum: homomorph;
    Sulcus acusticus: ostial, heterosulcoid;
    Posterior margin: sharply rounded and irregular;
    Thickness: moderately thin;
    Form: -Mesial slightly convex;
    Form: -Lateral slightly convex;
    Dorsal margin: approximately straight to slightly rounded;
Distribution:
    Early Pliocene: Cubagua Fm., Araya, Venezuela;

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