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Globorotalia (Hirsutella) challengeri Srinivasan & Kennett 1981 from: Kennett, J.Srinivasan, M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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Species Globorotalia (Hirsutella) challengeri Srinivasan & Kennett 1981


Alternative name:
Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test a fairly low trochospiral, unequally biconvex, equatorial periphery lobate, axial periphery rounded or with a tendency to become subangular, wall calcareous, thin, coarsely perforate, surface smooth; chambers twelve to fifteen, arranged in three whorls, five to five and one-half chambers in the final whorl, which increase slowly in size; chambers strongly inflated especially in the later stage; rounded to ovate in shape; sutures on spiral side curved, depressed; on umbilical side slightly sinuous to radial, depressed; aperture a distinct arch, with a prominent lip, interiomarginal, umbilical-extraumbilical; coiling predominantly sinistral.
Discussion / Comments:
Kennett & Srinivasan (1983):
This species differs from its ancestor, Gr. (G.) praescitula, in exhibiting five to five and one-half rather than four and one-half chambers in the final whorl, more inflated chambers, and a more rounded periphery. The species is also morphologically similar to Gr. (J.) mayeri but differs in being less elongate in equatorial profile and in exhibiting a distinctly low-arched aperture.
Synonym list:
Kennett & Srinivasan (1983):
1981 Globorotalia challengeri Srinivasan & Kennett. - Srinivasan & Kennett : 499-533 pl1
Was used in synonym list of:
References:

Srinivasan,M.S. and Kennett,J.P. (1981):
Neogene planktonic foraminiferal biostratigraphy and evolution: equatorial to subantarctic, South Pacific. . Marine Micropaleontology Vol. 6 p. 499-533

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Anonymous: Unedited TaxonConcept data
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