NMITA:Neogene Marine Biota of Tropical America



Eucinostomus sp.1



Specimen details:
 Sample Number: PPP2237
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 and irregular,;
    Ventral margin: rounded and lobed;
    Sulcus acusticus: ostial, heterosulcoid;
    Pseudocolliculum: absent;
    Colliculum: heteromorph, with low anterior and indistinct posterior colliculum;
    Excisura: moderately wide, notch shallow, angle acute;
    Antirostrum: small and pointed;
    Rostrum: short, broad and pointed;
    Ventral depression: absent;
    Dorsal depression: shallow over crista, poorly defined;
    Crista inferior: poor under ostium, ridge-like under cauda;
    Crista superior: poorly developed over ostium, ridge-like over cauda;
    Collum: low;
    Ostio-caudal differentiation: separated by the collum;
    Cauda: narrow, strongly flexed and deep;
    Ostium: oval, widely separated from cauda by collum;
    Posterior margin: sharply rounded and irregular;
    Dorsal margin sculpture: irregular;
    Form: -Lateral concave;
    Thickness: moderately thin;
    Form: -Mesial convex;
Distribution:
    Early Pliocene: Cayo Agua Fm., Bocas del Toro, Panama;

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