NMITA:Neogene Marine Biota of Tropical America



Neobythites marginatus (Goode & Bean, 1886)



Specimen details:
 Sample Number: PPP2229
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Bocas del Toro, Bocas del Toro, Panama

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Morphologic Description:

    Otolith shape: oval;
    Thickness: moderately thick;
    Form: -Mesial convex;
    Form: -Lateral slightly convex;
    Dorsal margin: slightly rounded to flat;
    Dorsal margin sculpture: slightly irregular;
    Ventral margin: rounded;
    Posterior margin: sharply rounded and entire;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, two colliculi;
    Pseudocolliculum: absent;
    Ostium: elongate, horizontal, and larger than cauda, with low colliculum;
    Cauda: small and oval, slightly flexed dorsally, filled with low colliculum;
    Ostio-caudal differentiation: ventrally constricted;
    Collum: absent;
    Crista superior: poorly developed;
    Crista inferior: poorly developed;
    Dorsal depression: very shallow depression;
    Ventral depression: absent;
    Rostrum: short and sharply rounded;
    Antirostrum: small and rounded;
    Excisura: moderate, shallow notch;
Distribution:
    Early Pliocene: Shark Hole Point Fm., Bocas del Toro, Panama;

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