Globorotalia (Globorotalia) ungulata Bermudez 1960 from: Quilty, P.G.. (1976): Planctonic foraminifera DSDP Leg 34- Nazca Plata . DSDP initial reports Vol. 34 . |
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Species Globorotalia (Globorotalia) ungulata Bermudez 1960 |
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Alternative name: |
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Diagnosis / Definition: |
Kennett & Srinivasan (1983):
Test small, umbilical side more highly vaulted than spiral, equatorial periphery ovate, slightly lobulate, axial periphery biconvex, with a thin but distinct keel; about
five chambers in the final whorl increasing uniformly in size as added; spiral sutures limbate, slightly raised, oblique, merging with the keel on the periphery, on umbilical side almost radial, depressed; surface thin, densely perforate with circular pores and flat and smooth interpore area ;
umbilicus narrow; aperture a low arch at the base of the smooth apertural face, bordered by a lip; interiomarginal umbilical-extraumbilical. |
Discussion / Comments: |
Kennett & Srinivasan (1983):
This species resembles Gr. (Gr.) tumida tumida in test shape but is distinguished from it by its very thin, delicate and
smooth, and finely perforate test |
Synonym list: |
Kennett & Srinivasan (1983):
Quilty (1976):
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Was used in synonym list of: |
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References: |
Bermudez,P.J. (1960): Contribución al estudio de las Globigerinidae de la región Caribe-Antillana (Paleoceno-Reciente) . Mem. Tercer Congr. Geol. Venezolano Vol. 3
Bermudez,P.J. (1961): Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleocene-Reciente). In: Boletino Geologia (Venezuela), Special Publicacion Vol. 3
Quilty,P.G.. (1976): Planctonic foraminifera DSDP Leg 34- Nazca Plata . DSDP initial reports Vol. 34
Kennett,J. and Srinivasan,M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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