NMITA:Neogene Marine Biota of Tropical America

Mugil aff. cephalus (Linnaeus, 1758)

Specimen details:
Sample Number: OA-1
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Paraguana, Paraguana, Venezuela

- Enlarge Image -

Morphologic Description:

    Otolith shape: oblong;
    Posterior margin: rounded or blunt and irregular;
    Ventral margin: slightly rounded and irregular;
    Excisura: moderately wide, notch very shallow, angle wide;
    Antirostrum: minute and rounded;
    Rostrum: short, broad and sharply rounded;
    Ventral depression: absent;
    Dorsal depression: shallow, oval and elongate;
    Crista inferior: poorly under ostium, well developed under cauda;
    Crista superior: very poorly developed over ostium, well developed over posterior cauda, ridge-like along mid-cauda;
    Collum: absent;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Cauda: large, narrow, sinuous. Tip gently flexed ventrally.;
    Ostium: semi-circular, widely open in the anterior margin;
    Pseudocolliculum: absent;
    Colliculum: heteromorph, slightly raised anterior, indistinct posterior colliculi;
    Sulcus acusticus: ostial, heterosulcoid;
    Thickness: moderately thick;
    Form: -Lateral concave;
    Dorsal margin: slightly rounded;
    Dorsal margin sculpture: irregular or lobed;
    Form: -Mesial convex;
    Early Miocene: Cantaure Fm., Paraguana, Venezuela;

Return to: