NMITA:Neogene Marine Biota of Tropical America



Lonchopisthus sp.1



Specimen details:
 Sample Number: PPP2184
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Bocas del Toro, Bocas del Toro, Panama

- Enlarge Image -

Morphologic Description:

    Otolith shape: oblong;
    Dorsal margin: slightly rounded to flat;
    Ventral margin: slightly rounded and entire;
    Sulcus acusticus: ostial, heterosulcoid;
    Pseudocolliculum: absent;
    Colliculum: heteromorph, low anterior and posterior colliculi;
    Excisura: moderate and angle wide;
    Antirostrum: small and sharply rounded;
    Rostrum: moderate, broad and pointed;
    Ventral depression: elongate and shallow;
    Dorsal depression: elongate and deep;
    Crista inferior: well developed ridge-like along the entire sulcus, except in the tip;
    Crista superior: well developed ridge-like along the entire sulcus, except in the tip;
    Collum: reduced;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Cauda: short and straight, slightly flexed ventrally along its length;
    Ostium: flared dorsally, moderately deep, anterior dorsal well poorly defined;
    Posterior margin: rounded and irregular;
    Dorsal margin sculpture: irregular or entire;
    Form: -Lateral convex;
    Thickness: moderately thick;
    Form: -Mesial convex;
Distribution:
    Late Pliocene: Escudo de Veraguas Fm., Bocas del Toro, Panama;

Return to: