Bolli1957 pl24-05.JPG
Olig Atlas pl16-02 05-7.JPG
juvenilis_holo.jpg
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Bolli1957 pl24-05.JPG
Olig Atlas pl16-02 05-7.JPG
juvenilis_holo.jpgLinked specimens: USNM-5617 USNM-5618
Current identification/main database link: Globigerinita glutinata (Egger, 1893)
Original Description
Shape of test moderately to distinctly trochospiral; equatorial periphery distinctly lobate. Wall calcareous, perforate, surface smooth to very finely pitted. Chambers spherical to ovate; about 12, arranged in about 3 whorls; the 3-4 chambers of the last whorl increase rapidly in size. Sutures on spiral side curved to radial in the early stage, radial in the last whorl, depressed; on umbilical side radial, depressed. Umbihcus very small. Aperture a low elongate slit, often with a thin lip; iateriomarginal, umbilical. Coiling random. Largest diameter of holotype 0.29 mm.
Extra details from original publication
Stratigraphic range (in Cipero and Lengua formations) : Globorotalia kugleri zone to Globorotalia menardii zone.
Remarks : Globigerina juvenilis, new species, appears to be related to G. bradyi Wiesner, but is less distinctly trochospiral. Transitional forms between the two species may be observed. It is also possible that Globigerina juvenilis represents the juvenile stage of Globigerinita naparimaensis Bronnimann, where the bulla is not yet developed (for comparison see Bolli, Loeblich and Tappan, 1957, pi. 8, figs. 1a-c).
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 V O Pearson, P. N., Wade, B. S. & Huber, B. T. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene Globigerinitidae (Dipsidripella, Globigerinita, and Tenuitella). In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 16): 429-458. gs V OReferences:
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Globigerina juvenilis compiled by the pforams@mikrotax project team viewed: 7-3-2021
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