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Chiloguembelina wilcoxensis Cushman & Ponton 1932 from: Van Eijden, A.J.M.Smit, J. (1991): Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy. In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123
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Anonymous: Unedited TaxonConcept data
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Species Chiloguembelina wilcoxensis Cushman & Ponton 1932


Diagnosis / Definition:
Pearson et al. (2006):
DESCRIPTION. See Olsson and others (1999) for a more complete description and discussion of this species.
Discussion / Comments:
Van Eijden & Smit (1991):
Remarks: C. wilcoxensis is usually rare in upper Paleocene-lower Eocene samples from Sites 752 and 757.
Pearson et al. (2006):
DISTINGUISHING FEATURES.- Distinguished by its large test size, broadly rounded periphery, rapid chamber size increase in initial portion of test, and symmetrically centered, low-arched to semicircular aperture surrounded by an equidimensional to slightly asymmetrically widened lip (see Olsson and others, 1999 for holotype illustrations and additional information). Differs from C. trinitatensis by having an intially rapidly tapering test that usually becomes parallel-sided in the final two pairs of adult chambers. STRATIGRAPHIC RANGE- Upper Paleocene Zone P4b through lower Eocene Zone E4. At middle latitude sites on the New Jersey coastal margin Liu and others (1 997) recorded the H0 of C. wilcoxensis in the middle of their Zone P6a (-Zone E2). For the southern high latitudes the L0 of C. wilcoxensis was reported slightly earlier than at low latitudes, within middle Zone AP2 (-Zone P4b), and the extinction of this species marks the top of the Chiloguemhelina wilcoxensis Zone (AE1) of Huber and Quillévéré (2005). PHYLOGENETIC RELATIONSHIPS.- Evolved from Chiloguembelina crinita during the late Paleocene. STABLE ISOTOPE PALEOBIOL0GY.- Recorded by Boersma and others (1987) with relatively negative oxygen isotope ratios, indicating predominant growth in the upper surface mixed layer.
Systematics:

17
 Genus Chiloguembelina
  Species Chiloguembelina wilcoxensis

35
  Ordo Foraminiferida
   Superfamilia Globigerinaceae
    Familia Chiloguembelinidae
     Species Chiloguembelina wilcoxensis
Synonym list:
Olsson et al. (1999):
1932 Guembelina wilcoxensis Cushman & Ponton. - Cushman & Ponton : p. 66 pl. 8, figs. 16, 17 (lower Eocene, Wilcox Fm., Ozark, Alabama)
1957 Chiloguembelina wilcoxensis Cushman & Ponton. - Beckmann : p. 92 pl. 21, figs. 10, 12-13, text-fig. 15 (49-58) (upper Paleocene to lower Eocene, Lizard Springs Fm., Trinidad)
1991 Chiloguembelina wilcoxensis Cushman & Ponton. - Huber : p. 440 pl. 6, figs. 4-5 (Zone AP6a, early Eocene, ODP Hole 738C/8R: 264.35 mbsf, Kerguelen Plateau, Southern Indian Ocean)
Van Eijden & Smit (1991):
1932 Guembelina wilcoxensis Cushman & Ponton. - Cushman & Ponton : p.66 pl. 8, figs. 16-17
1991 Chiloguembelina wilcoxensis Cushman & Ponton. - Van Eijden & Smit : p.102
Pearson et al. (2006):
1932 Guembelina wilcoxensis Cushman & Ponton. - Cushman & Ponton : p.66 pl. 8; fig. 16, 17 [lower Eocene, Wilcox Fm., Ozark, Alabama]
1957 Chiloguembelina wilcoxensis Cushman & Ponton. - Beckmann : p.92 pl. 21, fig. 10, 12-13; text-fig. 15 (49-58) [upper Paleocene and lower Eocene, Lizard Springs Fm., Trinidad]
1992 Chiloguembelina wilcoxensis Cushman & Ponton. - Olsson et al. : p. 92-93 pl. 13, fig. 19-20; pl. 70, fig. 11-13, 15-18 (illustration of USNM holotype) [lower Eocene, Zone AE 1, ODP Hole 690B, Maud Rise, Antarctic Ocean; lower Eocene, Globorotalia rex Zone, Lizard Springs Fm., Trinidad]
2006 Chiloguembelina wilcoxensis Cushman & Ponton. - Pearson et al. : p.467 pl. 16.1; fig. 13-15
References:

Cushman,J.A. and Ponton,G.M. (1932):
An Eocene foraminiferal fauna of Wilcox age from Alabama . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 8 p. 51-72

Beckmann,J.P. (1957):
Chiloguembelina Loeblich and Tappan and Related Foraminifera from the Lower Tertiary.
In: Studies in Foraminifera, United States National Museum Bulletin Vol. 215 Eds: Loeblich, A.R.et al. p. 83-95

Huber,B.T. (1991):
Paleogene and early Neogene planktonic foraminifer biostratigraphy of Sites 738 and 744, Kerguelen Plateau (southern Indian Ocean).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 119 Eds: Leckie, R.M.Sigurdsson, H.Acton, G.D.Draper, G. p. 427-449

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123

Olsson,R.K.; Hemleben,C.; Berggren,W.A. and Liu,C. (1992):
Wall texture classification of planktonic foraminifera genera in the lower Danian . Journal of Foraminiferal Research Vol. 22(3) p. 195-213

Olsson,R.K.; Berggren,W.A.; Hemleben,C. and Huber,B.T. (1999):
Atlas of Paleocene planktonic foraminifera - online version. , Smithsonian Contributions to Paleobiology Vol. 85 p. 1-252

Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006):
Atlas of Eocene Planktonic Foraminifera. p. 1-513
Anonymous: Unedited TaxonConcept data
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