NMITA:Neogene Marine Biota of Tropical America



Chilara sp.1



Specimen details:
 Sample Number: PPP2221
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;
    Dorsal margin: slightly rounded to flat, with anterior expansion;
    Ventral margin: slightly rounded, with anterior expansion;
    Sulcus acusticus: ostial, heterosulcoid;
    Posterior margin: sharply rounded, pointed and entire;
    Dorsal depression: absent;
    Crista inferior: poorly developed along entire sulcus;
    Crista superior: poorly developed along entire sulcus;
    Collum: absent;
    Ostio-caudal differentiation: ventrally slightly constricted;
    Cauda: short, slightly flexed ventrally;
    Ostium: oval, superficial and large;
    Pseudocolliculum: absent;
    Excisura: narrow, notch absent;
    Antirostrum: short and rounded;
    Rostrum: small and rounded;
    Ventral depression: absent;
    Colliculum: heteromorph and low;
    Dorsal margin sculpture: irregular;
    Form: -Lateral convex;
    Thickness: very thick;
    Form: -Mesial slightly convex;
Distribution:
    Early Pleistocene: Swann Cay Fm., Bocas del Toro, Panama;

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