Atlas of Benthic Shelf Foraminifera of the Southwest by Esteban Boltovskoy, Graciela Giussani, Silvia Watanabe, PDF

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

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

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AGE: Eocene. DESCRIPTION: Test ovate, compressed, peripheral margin broadly rounded; 9-11 chambers in final whorl; wall translucent, densely perforate with relatively large pores; sutures Iimbate, expanding toward umbilicus, smooth, curved, slightly depressed in final few chambers; aperture lunate with narrow border, located at base of flat, imperforate apertural face. 26. DISTRIBUTION: see Figures 9 and 16. MILlOLlNELLA Wiesner, 1931 Test quinqueloculine or triloculine; wall calcareous, porcellaneous, imperforate; sutures distinct; aperture terminal, covered by valvular flap.

V. 31, pt. 64, p. 128, pI. 13, figs. 1-3. TYPE LOCALITY: British Isles. AGE: Recent. DESCRIPTION: Test ovate in outline, compressed, peripheral margin rounded, lobate; chambers inflated to subglobular on spiral side, concave near umbilical region, 4-5 in final whorl, I ~-2 whorls; wall thin, transparent, shiny, finely perforate, on umbilical side convered with grooves radiating from umbilicus but failing to reach periphery; sutures depressed, well developed; aperture a large umbilical opening.

Elphidium (Pulystomella) magellanicum Heron-Allen and Earland, 1932. Discovery Repts .. p. 440, pI. 16, figs. 26-28. Tierra del Fuego and Estrecho de Magallanes. AGE: Recent. DESCRIPTION: Test subcircular in outline. distinctly lobate, peripheral margin rounded, sometimes asymmetrical; chambers broad, inflated, slightly curved, 6-7 in final whorl; wall radial, transparent to translucent, finely perforate, delicate, generally covered with small rounded pustules; sutures radiaL depressed. narrow.

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