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Spiroloculina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Nubeculariidae
Subfamily:
Spiroloculininae
Formal Genus Name and Reference:
Spiroloculina D'ORBIGNY, 1826, *1391, p. 298
Type Species:
S. depressa, SD CUSHMAN, 1917, *404f, p. 29
Images
(Click to enlarge in a new window)
Fig. 343, 1,2 . *S. depressa, Plio., Eu.(Italy), 1a,b, side, top views of megalospheric topotype, X41, 2 a, b, side, top views of microspheric hypotype showing early cyclogyrine coil, X105 (*2117). --Fig. 343,3,4. S. robusta Brady, Rec., Carib. (3), Gulf Mex. (4), 3 a, b, side and top views of topotype, X25, 4, sectioned hypotype showing early stage, X31 (*2117).
Synonyms
Geographic Distribution
U.Cret.-Rec., cosmop.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, commonly with flattened sides and lanceolate or fusiform outline, earliest stage may consist of single chamber completely encircling proloculus, later chambers (or all chambers in megalospheric forms) being added 2 to whorl on alternate sides and in single plane, wall calcareous, imperforate, porcelaneous, aperture at open end of final chamber, with simple or bifid tooth.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Nubeculariidae
Subfamily:
Spiroloculininae
Formal Genus Name and Reference:
Spiroloculina D'ORBIGNY, 1826, *1391, p. 298
Type Species:
S. depressa, SD CUSHMAN, 1917, *404f, p. 29
Images
(Click to enlarge in a new window)
Fig. 343, 1,2 . *S. depressa, Plio., Eu.(Italy), 1a,b, side, top views of megalospheric topotype, X41, 2 a, b, side, top views of microspheric hypotype showing early cyclogyrine coil, X105 (*2117). --Fig. 343,3,4. S. robusta Brady, Rec., Carib. (3), Gulf Mex. (4), 3 a, b, side and top views of topotype, X25, 4, sectioned hypotype showing early stage, X31 (*2117).
Synonyms
Geographic Distribution
U.Cret.-Rec., cosmop.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, commonly with flattened sides and lanceolate or fusiform outline, earliest stage may consist of single chamber completely encircling proloculus, later chambers (or all chambers in megalospheric forms) being added 2 to whorl on alternate sides and in single plane, wall calcareous, imperforate, porcelaneous, aperture at open end of final chamber, with simple or bifid tooth.