NMITA:Neogene Marine Biota of Tropical America



Arius aff. kessleri (Steindachner, 1876)



Specimen details:
 Sample Number: PPP04
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Canal, Canal, Panama

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Morphologic Description:

    Otolith shape: approximately rectangular, but flattened with a small spur on one side;
    Thickness: very thick and bulbous;
    Form: -Mesial convex and smooth;
    Form: -Lateral convex and uneven;
    Dorsal margin: rounded, one of the sides flattened or emarginate;
    Dorsal margin sculpture: entire to slightly irregular;
    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;
Distribution:
    Middle Miocene to Late Miocene: Gatun Fm., Canal, Panama;

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