NMITA:Neogene Marine Biota of Tropical America



Myripristis sp.2



Specimen details:
 Sample Number: PPP2541
Type Status: nontype
Scale Bar is 1 mm
Type: SEM
Orientation: mesial
Locality: Paraguana, Paraguana, Venezuela

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Morphologic Description:

    Otolith shape: semi-circular;
    Thickness: thick;
    Form: -Mesial slightly convex;
    Form: -Lateral slightly convex;
    Dorsal margin: approximately flat;
    Dorsal margin sculpture: irregular;
    Ventral margin: sharply rounded and entire to slightly irregular;
    Posterior margin: sharply rounded and slightly irregular;
    Sulcus acusticus: ostial, heterosulcoid;
    Colliculum: heteromorph, anterior colliculum and complex posterior colliculum;
    Pseudocolliculum: absent;
    Ostium: eroded or broken in the fossil specimens;
    Cauda: complex with forked tail, with posterior collicullum;
    Ostio-caudal differentiation: dorso-ventrally constricted;
    Collum: absent;
    Crista superior: poorly developed over ostium, narrow and ridge-like outlining cauda;
    Crista inferior: poorly developed under ostium and central cauda, ridge-like under ventral fork;
    Dorsal depression: deep behind dorsal fork;
    Ventral depression: absent;
    Rostrum: small and rounded;
    Antirostrum: absent;
    Excisura: narrow, notch absent;
Distribution:
    Early Miocene: Cantaure Fm., Paraguana, Venezuela;

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