"The morphology of Sphaerogypsina as seen in thin section affords various characters useful in classification] 1) arrangement and composition of the wall (calcareous-perforate, radially crystalline); 2) layering of wall (like Gypsina, without layering or black line, having only microlamellae); 3) shape of test (always spherical); and 4) specific characters: size of test, order/unorder ratio, size of chambers, wall thickness, pore diameter, and type of embryonic apparatus.
Correlation of the above characters has allowed recognition of two new species. Comparisons with other genera strongly suggest placing the genus in the Family Gypsinidae (nom. correct.) rather than in the Acervulinidae or Planorbulinidae. Study of the wall of Sphaerogypsina has revealed apertures and stolons which were observed by Carpenter, Uhlig, and Bursch, but were overlooked by Brady, Galloway, and most other workers.
Compilation of data from the literature on Sphaerogypsina has resulted in a distribution chart and some ecological interpretations of the genus"--Abstract, page ii.
Frizzell, Don L. (Donald Leslie), 1906-1972
Rupert, Gerald B., 1930-2016
Spreng, Alfred C., 1923-2012
Christiansen, Carl R., 1921-1997
Geosciences and Geological and Petroleum Engineering
M.S. in Geology
Missouri School of Mines and Metallurgy
iv, 58 pages
© 1962 Wayne C. Horton, All rights reserved.
Thesis - Open Access
Foraminifera, Fossil -- Classification
Foraminifera, Fossil -- Nomenclature
Paleontology -- Cenozoic
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Link to Catalog Record
Horton, Wayne C., "Foraminifera of the Cenozoic and recent genus Sphaerogypsina Galloway" (1962). Masters Theses. 2719.