NMITA:Neogene Marine Biota of Tropical America

Arius aff. seemani (Gunther, 1864)

Specimen details:
Sample Number: PPP1139
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Darien, Darien, Panama

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Morphologic Description:

    Otolith shape: approximately circular, but flattened with a small spur on one side;
    Thickness: very thick and bulbous;
    Form: -Mesial convex and smooth;
    Form: -Lateral slightly convex;
    Dorsal margin: rounded, one of the sides flattened or emarginate;
    Dorsal margin sculpture: entire;
    Lateral surface: raised nucleus and radiating grooves;
    Otolith feature: a short deep groove is found near the spur on ventral side, close to the margin, groove ends near spur;
    Late Miocene: Tuira Fm., Darien, Panama;

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