NMITA:Neogene Marine Biota of Tropical America



Albula sp.1



Specimen details:
 Sample Number: OA-1
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Paraguana, Paraguana, Venezuela

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Morphologic Description:

    Otolith shape: oblong;
    Thickness: moderately thick;
    Form: -Mesial convex;
    Form: -Lateral concave anteriorly, convex and thick posteriorly;
    Dorsal margin: flattened;
    Dorsal margin sculpture: slightly irregular with an indentation over the caudal flexion;
    Ventral margin: rounded and approximately entire;
    Posterior margin: slightly rounded with posterio-dorsal corner acutely angular;
    Posterior margin sculpture: slightly irregular;
    Sulcus acusticus: ostial, opening to anterior-dorsal margin, heterosulcoid;
    Colliculum: homomorph, single anterior colliculum distinct, with rough to nodular surface;
    Pseudocolliculum: absent;
    Ostium: approximately oval and elongate;
    Cauda: very deep, with right-angled flexion, tip close to margin;
    Ostio-caudal differentiation: slight dorsal constriction;
    Collum: absent,;
    Crista superior: absent over ostium, ridge-like over anterior cauda, well developed along posterior cauda;
    Crista inferior: poorly developed under ostium and anterior cauda well developed along posterior cauda;
    Dorsal depression: small, at margin, dorsal area very reduced;
    Ventral depression: absent, ventral area smooth;
    Rostrum: extremely large and very rounded;
    Antirostrum: absent;
    Excisura: extremely wide, notch absent;
Distribution:
    Early Miocene: Cantaure Fm., Paraguana, Venezuela;

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