NMITA:Neogene Marine Biota of Tropical America

Pythonichthys sp.2

Specimen details:
Sample Number: PPP1132
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Darien, Darien, Panama

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Morphologic Description:

    Otolith shape: circular;
    Thickness: moderately thick;
    Form: -Mesial convex;
    Form: -Lateral approximately flat;
    Dorsal margin: rounded;
    Dorsal margin sculpture: slightly irregular;
    Ventral margin: rounded, slightly irregular;
    Posterior margin: rounded and entire;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: homomorph, single;
    Pseudocolliculum: absent;
    Ostio-caudal differentiation: undifferentiated, shallows, no constriction;
    Collum: absent;
    Crista superior: well developed over the entire sulcus;
    Crista inferior: well developed under entire sulcus;
    Dorsal depression: absent;
    Ventral depression: absent;
    Rostrum: small and rounded;
    Antirostrum: small and rounded;
    Excisura: narrow and shallow;
    Late Miocene: Tuira Fm., Darien, Panama;

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