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Species Chiloguembelina trinitatensis Cushman & Renz 1942


Diagnosis / Definition:
Pearson et al. (2006):
DESCRIPTION. See Olsson and others (1999) for description and discussion of this species.
Discussion / Comments:
Pearson et al. (2006):
DISTINGUISHING FEATURES.- Distinguished by its biserial test with 5-6 pairs of inflated chambers that increase uniformly in breadth and height, forming a moderately tapered outline in side view, and by the symmetrically centered, low-arched aperture that is surrounded by a narrow, equidimensional lip (see Olsson and others, 1999 for holotype illustrations and additional information). Rare specimens with two apertures (e.g., P1. 16.2, Fig. l) are placed in C. trinitatensis rather than C. crinita because of the presence of an equidimensional, rather than asymmetrically folded, bordering lip. Chiloguembelina trinitatensis has uniformly tapering test outline unlike C. wilcoxensis, which has a rapidly tapering test outline in the early portion of the test then becomes parallel sided with the last two pairs of adult chambers. PHYLOGENETIC RELATIONSHIPS- Evolved from Chiloguembelina wilcoxensis during the latest Paleocene. STRATIGRAPHTC RANGE.- Upper Paleocene Zone P5 to lower Eocene Zone E3 (upper part). STABLE ISOTOPE PALEOBIOLOGY.- No data available.
Systematics:

35
 Ordo Foraminiferida
  Superfamilia Globigerinaceae
   Familia Chiloguembelinidae
    Genus Streptochilus
Synonym list:
Olsson et al. (1999):
1942 Guembelina trinitatensis Cushman & Renz. - Cushman & Renz : p. 8 pl. 2, fig. 8 (Paleocene, Soldado Fm., Trinidad)
1957 Chiloguembelina trinitatensis Cushman & Renz. - Beckmann : p. 91 pl. 21, fig. 7, text-fig. 15 (43-45) (Globorotalia velascoensis Zone, Lizard Springs Fm., Trinidad).
Pearson et al. (2006):
1942 Guembelina trinitatensis Cushman & Renz. - Cushman & Renz : p.8 pl. 2; fig. 8 [Paleocene, Soldado Fm., Trinidad]
1957 Chiloguembelina trinitatensis Cushman & Renz. - Beckmann : p.91 pl. 21, fig. 7; text-fig. 15 (43-45) [Globorotalia velascoensis Zone, Lizard Springs Fm., Trinidad]
1965 Chiloguembelina trinitatensis Cushman & Renz. - McGowran : p.68 pl. 5, fig. 4; text-fig. 14 [upper Paleocene, Wangerrip Group, western Victoria]
1971 Chiloguembelina trinitatensis Cushman & Renz. - Jenkins : p.67 pl. 1; fig. 8-9 [upper Paleocene, mid-Waipara River, South Island, New Zealand]
1999 Chiloguembelina trinitatensis Cushman & Renz. - Olsson et al. : p.92 pl. 13, fig. 11, 16; pl. 70, fig. 8-10, 14 (illustration of USNM holotype) [upper Paleocene Zone P5, DSDP Site 152, Nicaragua Rise, Caribbean Sea]
2006 Chiloguembelina trinitatensis Cushman & Renz. - Pearson et al. : p.468 pl. 16.2; fig. 1-5
References:

Cushman,J.A. and Renz,H.H. (1942):
Eocene, Midway, Foraminifera from Soldado Rock, Trinidad . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 18 p. 1-20

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

McGowran,B. (1965):
Two Paleocene Foraminiferal Faunas from the Wangerrip Group, Pebble Point Coastal Section, Western Australia . Proceedings Royal Society Victoria Vol. 79 p. 9-74

Jenkins,D.G. (1971):
New Zealand Cenozoic Planktonic Foraminifera . New Zealand Geological Survey Paleontological Bulletin Vol. 42

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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