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Linked specimens: USNM-5628
Current identification/main database link: Clavatorella bermudezi (Bolli, 1957)
Original Description
Size:
Etymology:
Extra details from original publication
Remarks: Hastigerinella bermudezi, new species, differs from H. digitata Rhumbler (=H. rhumbleri Galloway) in its lower trochospiral form and less elongate chambers. The Hastigerinella species of similar aspect described from the Eocene (H. eocena Nuttall, H. colombiana Fetters) are not fully preserved specimens and the position of the aperture of the ultimate chamber is not clearly visible. It appears likely that these Eocene forms belong to Clavigerinella which possesses an interiomarginal, symmetrical aperture. No typical species of it are known from the Cretaceous; those described from the Cretaceous belong largely to Hastigerinoides or Praeglobotruncana (see Bolli, Loeblich, and Tappan, 1957). It seems probable that true Hastigerinella does not appear before the Miocene.
Stratigraphic range (in Cipero formation): Globorotalia fohsi barisanensis zone.
Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs Bolli, H. M. (1957b). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 97-123. gs References:
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Hastigerinella bermudezi compiled by the pforams@mikrotax project team viewed: 30-11-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=131703 Go to Archive.is to create a permanent copy of this page - citation notes |
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