NMITA:Neogene Marine Biota of Tropical America



Epigonus denticulatus (Dieuzeide, 1950)



Specimen details:
 Sample Number: PPP3057
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Araya, Araya, Venezuela

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Morphologic Description:

    Otolith shape: rhomboidal, very high;
    Dorsal margin sculpture: entire to irregular;
    Posterior margin: slightly rounded, sinuate to irregular;
    Ventral margin: rounded and entire to slightly irregular;
    Crista inferior: poorly developed under ostium, well developed under cauda;
    Crista superior: well developed ridge-like, except over anterior ostium and caudal tip;
    Collum: absent;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Cauda: short, narrow and almost straight, tip indistinct, ends open to posterior margin;
    Ostium: oval, slightly angled dorsally;
    Pseudocolliculum: absent;
    Colliculum: heteromorph, anterior colliculum oval and raised, posterior low;
    Excisura: moderate, notch shallow, angle wide;
    Antirostrum: short and sharply rounded;
    Rostrum: short, broad and sharply pointed;
    Ventral depression: absent and arch groove parallel to ventral margin;
    Dorsal depression: oval, above anterior cauda;
    Sulcus acusticus: ostial, heterosulcoid;
    Dorsal margin: rounded, height and flattened dorsally;
    Thickness: moderately thin;
    Form: -Mesial slightly convex;
    Form: -Lateral convex;
Distribution:
    Early Pliocene: Cubagua Fm., Araya, Venezuela;

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