NMITA:Neogene Marine Biota of Tropical America



Pachypops fitchi (Schwarzhans, 1993)



Specimen details:
 Sample Number: PPP2673
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Manzanilla Bay, Manzanilla Bay, Trinidad

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Morphologic Description:

    Otolith shape: oblong becoming subcircular;
    Thickness: moderately thick;
    Form: -Mesial slightly convex;
    Form: -Lateral convex;
    Dorsal margin: slightly rounded;
    Dorsal margin sculpture: entire to slightly irregular;
    Ventral margin: slightly rounded and entire;
    Posterior margin: slightly rounded and entire;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, low anterior and indistinct posterior colliculi;
    Pseudocolliculum: absent;
    Ostium: small, subquadrangular;
    Cauda: long and narrow, strongly bent in a continuous arch in ventral direction;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: poorly developed over ostium, ridge-like over cauda;
    Crista inferior: poorly developed under ostium, moderately well developed along the entire cauda;
    Dorsal depression: shallow and elongate;
    Ventral depression: absent;
    Rostrum: reduced;
    Antirostrum: reduced;
    Excisura: moderately narrow, notch absent;
Distribution:
    Middle Miocene: Manzanilla Fm., Manzanilla Bay, Trinidad;

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