Non radiate Wall Ultrastructure in Lepidocyclina Gümbel

• Kh. Ouda ^[1] ; Nadia Sharara ^[1]
  1. [1] Assiut University

     Assiut University

     Egipto

     
• Localización: Revista española de micropaleontología, ISSN 0556-655X, Vol. 10, Nº. 2, 1978, págs. 323-336
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Transmission electron microscopy of the wall surfaces of the shells of Lepidocycling (Nephrolepidina) H. Douvillé, recorded from different localities in the northern Western Desert of Egypt, and ranging in age from the Late Oligocene to Early Miocene (Burdigalian), revealed that the wallforming calcite is morphologically variable and exhibiting on the exterior surface a predominantly non-radiate crystallographic pattern. Pores of differing size, shape and mode of arrangement were found situated both inside and along the boundaries between crystal units.

    The results substantiate the rejection of wall structure as a taxonomic basis for suprageneric classification within the calcareous Foraminiferida.