NMITA:Neogene Marine Biota of Tropical America



Maurolicus muelleri (Gmelin, 1789)



Specimen details:
 Sample Number: PPP2171
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: approximately triangular, becoming rhomboidal;
    Posterior margin: generally rounded with sharp angles at dorsal and ventral corners, sculpture is slightly irregular;
    Ventral margin: approximately straight, angled to rostrum, irregular and dentate;
    Excisura: wide, notch absent or very shallow;
    Antirostrum: absent, dorsal wall rises distinctly posterior to excisura;
    Rostrum: prominent, tapering anteriorly to a point;
    Ventral depression: absent;
    Dorsal depression: absent, the area forms a smooth plateau;
    Crista inferior: ridge-like and straight above the sulcus absent at tip;
    Crista superior: ridge-like and straight along the sulcus absent at tip;
    Collum: absent;
    Ostio-caudal differentiation: no constriction;
    Pseudocolliculum: absent;
    Colliculum: homomorph, very low, indistinct anterior colliculum;
    Sulcus acusticus: ostial, archaesulcoid;
    Thickness: medium thin;
    Form: -Lateral convex, narrowing to rostrum;
    Dorsal margin: approximately straight, angled to rostrum;
    Dorsal margin sculpture: entire to irregular;
    Form: -Mesial flat;
Distribution:
    Late Pliocene: Escudo de Veraguas Fm., Bocas del Toro, Panama;

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