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Download e-book for iPad: Atlas of Benthic Shelf Foraminifera of the Southwest by Esteban Boltovskoy, Graciela Giussani, Silvia Watanabe,

By Esteban Boltovskoy, Graciela Giussani, Silvia Watanabe, Ramil Wright (auth.)

ISBN-10: 9400991886

ISBN-13: 9789400991880

ISBN-10: 9400991908

ISBN-13: 9789400991903

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Additional info for Atlas of Benthic Shelf Foraminifera of the Southwest Atlantic

Sample text

Ser. 3. v. 4\), p. 332, pI. 4, figs. 40-48. TYPE LOCALITY: Banco Burdwood, Islas Malvinas and Estrecho de Magallanes. AGE: Recent. DESCRIPTION: Test ovate in outline, lobate, peripheral margin rounded to carinate, compressed; chambers on spiral side ornamented with irregularly arranged and raised costae which ramify from raised sutures, on umbilical side, inflated, with inner margin concave, bearing radiating intersutural furrows which mayor may not reach peripheral margin, 6-8 in final whorl; wall translucent, glassy, finely perforate; aperture eccentric, at base of ovate depression lying beneath internal margin of chambers, with short triangular tooth.

14. fig. 4); umbilical zone somewhat convex with boss or several nodes; apertural face triangular. covered with small pustules; aperture multiple, interiomarginal. surrounded by small rims. OBSERVATIONS: Populations of E. macellum exhibit two formae which intergrade with each other. Elphidium IIlCleellum (Fichtel and Moll), forma typica, PI. 14, figs. 1-4. This forma has a carinate periphery, multiple nodes and many chambers in the final whorl. 28. DISTRIBUTION: see Figure 7 and 14. CHARACTERISTIC TRAITS: Elphidium macellWl1 (Fichtel and Moll), forma oweniana, PI.

DESCRIPTION: Test ellipsoidal, compressed, sides parallel, peripheral margin rounded; wall shiny, smooth; aperture narrow, short, with long entosolenian tube. LENGTH: range: 200-240. OBSERVATIONS: As our specimens lack the carinate margin of F. elliptica as described by Sequenze, we designate it F. cf. F. elliptica. DISTRIBUTION: see Figure 7. TYPE LOCALITY: Fissurina laevigata Reuss, PI. 15, fig. 14-16. ORIGINAL CITATION: Fissurina laevigata Reuss, 1850. K. Akad. Wiss. Wien, Math. Nat. , v. 1, p.

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Atlas of Benthic Shelf Foraminifera of the Southwest Atlantic by Esteban Boltovskoy, Graciela Giussani, Silvia Watanabe, Ramil Wright (auth.)


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