NMITA:Neogene Marine Biota of Tropical America




Sciaenops sp.1




Specimen details:
Sample Number: PPP2563
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Araya, Araya, Venezuela

- Enlarge Image -

Morphologic Description:

    Otolith shape: becoming subrectangular;
    Thickness: moderately thick;
    Form: -Mesial slightly convex;
    Form: -Lateral convex;
    Dorsal margin: slightly straight;
    Dorsal margin sculpture: slightly irregular;
    Ventral margin: slightly rounded and entire;
    Posterior margin: straight and slightly irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, low anterior and indistinct posterior colliculi;
    Pseudocolliculum: absent;
    Ostium: moderate and ovoid;
    Cauda: straight and narrow, tip gently bent in ventral direction and pointed;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: poorly developed over ostium, ridge-like over horizontal portion of the cauda;
    Crista inferior: poorly developed under ostium, moderately well developed under cauda;
    Dorsal depression: shallow and elongate;
    Ventral depression: absent;
    Rostrum: reduced;
    Antirostrum: reduced;
    Excisura: narrow, notch absent;
Distribution:
    Early Pliocene: Cubagua Fm., Araya, Venezuela;


Return to: