NMITA:Neogene Marine Biota of Tropical America

Perulibatrachus sp.1

Specimen details:
Sample Number: PPP2669
Type Status: nontype
Scale Bar is 0 mm
Type: SEM
Orientation: mesial
Locality: Manzanilla Bay, Manzanilla Bay, Trinidad

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Morphologic Description:

    Otolith shape: oval, with antero-dorsal expansion;
    Thickness: thick;
    Form: -Mesial slightly flat;
    Form: -Lateral convex;
    Dorsal margin: rounded;
    Dorsal margin sculpture: irregular;
    Ventral margin: slightly rounded and irregular;
    Posterior margin: sharply rounded and irregular;
    Sulcus acusticus: mesial, archeosulcoid;
    Colliculum: homomorph, two colliculi almost equal in size and shape;
    Pseudocolliculum: narrow;
    Ostium: oval;
    Cauda: oval;
    Ostio-caudal differentiation: slight dorso-ventral constriction;
    Collum: slightly raised and uneven;
    Crista superior: well developed;
    Crista inferior: well developed;
    Dorsal depression: oval;
    Ventral depression: absent;
    Rostrum: reduced;
    Antirostrum: absent;
    Excisura: poorly defined;
    Middle Miocene: Manzanilla Fm., Manzanilla Bay, Trinidad;

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