Consideraciones morfotaxonómicas sobre "Orbulina universa" d'Orbigny (foraminiferida)

1.072 specimens of Orbulina universa d'Orbigny are examined. A planktonic foraminifer, with adherent spines, belonging to the genera Gfobigerina, Globigerinoides and Hastigerina is identified inside of a 12% of the shells. An hypothesis about the roll of performance of this sphaerical chamber,...

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Bibliographic Details
Main Authors: Parada Ruffinatti, Carmen, Pérez R., Valdemar, Sánchez, Carlos Alberto
Format: Article in Journal/Newspaper
Language:Spanish
Published: Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Instituto de Ciencias Naturales 1991
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Online Access:https://revistas.unal.edu.co/index.php/cal/article/view/35611
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Summary:1.072 specimens of Orbulina universa d'Orbigny are examined. A planktonic foraminifer, with adherent spines, belonging to the genera Gfobigerina, Globigerinoides and Hastigerina is identified inside of a 12% of the shells. An hypothesis about the roll of performance of this sphaerical chamber, in the vital cycle of this planktonic foraminifera, is stablished. The final conclusion is that Orbulina is not a genus but a transitory form in various foraminifera of planktonic life. Se examinan 1.072 ejemplares de Orbulina universa d'Orbigny. En el interior de un 12% de ellos se identifica un foraminífero planctónico, adherido mediante espinas y perteneciente a alguno de los géneros Globigerina, Globigerinoides y Hastigerina. Se plantea una hipótesis sobre el papel que desempeña esta cámara esférica en el ciclo vital de estos foraminíferos y se concluye que Orbulina no es un género, sino una forma transitoria en varios foraminíferos de vida planctónica.