NMITA:Neogene Marine Biota of Tropical America



Parascombrops aff. argyreus (Alcock, 1969)



Specimen details:
 Sample Number: PPP3059
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Araya, Araya, Venezuela

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Specimen details:
 Sample Number: PPP3059
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Araya, Araya, Venezuela

- Enlarge Image -

Morphologic Description:

    Otolith shape: oblong;
    Thickness: thin;
    Form: -Mesial flat;
    Form: -Lateral slightly flat;
    Dorsal margin: slightly flat;
    Dorsal margin sculpture: sinuate;
    Ventral margin: rounded and cretane;
    Posterior margin: flattened, crenate or irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph;
    Pseudocolliculum: absent;
    Ostium: oblong, directed somewhat upwards;
    Cauda: straight, very slight ventral curve at tip;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: absent over anterior ostium, ridge-like from ostium along cauda,absent at tip;
    Crista inferior: poorly developed under ostium, well developed under cauda;
    Dorsal depression: shallow and narrow;
    Ventral depression: absent;
    Rostrum: short, broad and pointed;
    Antirostrum: small and sharply rounded;
    Excisura: moderate, notch shallow;
Distribution:
    Early Pliocene: Cubagua Fm., Araya, Venezuela;

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