NMITA:
N
eogene
M
arine B
i
ota of
T
ropical
A
merica
Sciaenops sp.1
Specimen details:
Sample Number:
PPP2563
Type Status:
nontype
Scale Bar is
1 mm
Type:
SEM
Orientation:
mesial
Locality:
Araya, Araya, Venezuela
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Morphologic Description:
Otolith shape:
becoming subrectangular;
Thickness:
moderately thick;
Form: -Mesial
slightly convex;
Form: -Lateral
convex;
Dorsal margin:
slightly straight;
Dorsal margin sculpture:
slightly irregular;
Ventral margin:
slightly rounded and entire;
Posterior margin:
straight and slightly irregular;
Sulcus acusticus:
ostial, heterosulcoid;
Colliculum:
heteromorph, low anterior and indistinct posterior colliculi;
Pseudocolliculum:
absent;
Ostium:
moderate and ovoid;
Cauda:
straight and narrow, tip gently bent in ventral direction and pointed;
Ostio-caudal differentiation:
dorso-ventrally constricted;
Collum:
absent;
Crista superior:
poorly developed over ostium, ridge-like over horizontal portion of the cauda;
Crista inferior:
poorly developed under ostium, moderately well developed under cauda;
Dorsal depression:
shallow and elongate;
Ventral depression:
absent;
Rostrum:
reduced;
Antirostrum:
reduced;
Excisura:
narrow, notch absent;
Distribution:
Early Pliocene:
Cubagua Fm., Araya, Venezuela;
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