NMITA:Neogene Marine Biota of Tropical America

Stellifer aff. zestocarus (Gilbert, 1898)

Specimen details:
Sample Number: PPP1728
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Limon, Limon, Costa Rica

- Enlarge Image -

Morphologic Description:

    Otolith shape: approximately rectangular;
    Sulcus acusticus: ostial, heterosulcoid;
    Posterior margin: sharply rounded, and flattened ventrally;
    Dorsal depression: very narrow and elongate;
    Crista inferior: poorly developed under ostium, well developed under cauda;
    Crista superior: poorly developed over ostium, ridge-like over anterior portion of the cauda;
    Collum: absent;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Cauda: deep and wide, strongly flexed, ending close to ventral margin;
    Ostium: small, oval and externally protruding;
    Pseudocolliculum: absent;
    Excisura: moderately wide;
    Antirostrum: sharply pointed;
    Rostrum: reduced or absent;
    Ventral depression: absent;
    Colliculum: heteromorph, low anterior and indistinct posterior colliculi;
    Form: -Mesial slightly convex;
    Dorsal margin: slightly rounded;
    Dorsal margin sculpture: pre-dorsal spine acute;
    Ventral margin: slightly flat;
    Form: -Lateral convex;
    Thickness: thick;
    Late Pliocene: Rio Banano Fm., Limon, Costa Rica;

Return to: