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Bolivina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Buliminacea
Family:
Bolivinitidae
Formal Genus Name and Reference:
Bolivina D'ORBIGNY, 1839, *1393, p. 60
Type Species:
B. plicata, SD CUSHMAN, 1911, *404b, p. 31
Images
(Click to enlarge in a new window)
Fig. 434,7. *B. plicata, Rec., Panama, 7 a, b, side, apert. views, X99 (*2117), Fig. 434,8,9. B. afra (Reyment) U.Cret.(Maastricht.), Nigeria; 8a,b, side and top views of microspheric test showing surface ribs and chamber overlaps, X40; 9, dissected final chamber showing rear side of tooth plate (t), intercameral foramen (f), lip of preceding tooth plate (I), apertural depression (d), crenulated terminal wall of penultimate chamber (c) and cren- ulations from interior (cr), X147 (*1557)
Synonyms
Grammostomum
Geographic Distribution
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 elongate, may be somewhat compressed, chambers broad, low, biserially arranged throughout, basal margins of chambers with retral processes or backward directed chamber overlaps, wall calcareous, perforate, radial in structure, smooth, striate, or costate and may have marginal keel, aperture a narrow, elongate loop up chamber face, one margin ending blindly or bent upward as collar, opposite border attached to one side of doubly folded internal tooth plate (U-shaped in section), attached half of tooth plate projecting inward to coalesce with free half of tooth plate of previous foramen, free half of tooth plate projecting through aperture at one extremity and bisecting it, narrowing rapidly inward, tooth plate thus being trough-shaped structure with concave portion alternately turning from one side to opposite in successive chambers.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Buliminacea
Family:
Bolivinitidae
Formal Genus Name and Reference:
Bolivina D'ORBIGNY, 1839, *1393, p. 60
Type Species:
B. plicata, SD CUSHMAN, 1911, *404b, p. 31
Images
(Click to enlarge in a new window)
Fig. 434,7. *B. plicata, Rec., Panama, 7 a, b, side, apert. views, X99 (*2117), Fig. 434,8,9. B. afra (Reyment) U.Cret.(Maastricht.), Nigeria; 8a,b, side and top views of microspheric test showing surface ribs and chamber overlaps, X40; 9, dissected final chamber showing rear side of tooth plate (t), intercameral foramen (f), lip of preceding tooth plate (I), apertural depression (d), crenulated terminal wall of penultimate chamber (c) and cren- ulations from interior (cr), X147 (*1557)
Synonyms
Grammostomum
Geographic Distribution
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 elongate, may be somewhat compressed, chambers broad, low, biserially arranged throughout, basal margins of chambers with retral processes or backward directed chamber overlaps, wall calcareous, perforate, radial in structure, smooth, striate, or costate and may have marginal keel, aperture a narrow, elongate loop up chamber face, one margin ending blindly or bent upward as collar, opposite border attached to one side of doubly folded internal tooth plate (U-shaped in section), attached half of tooth plate projecting inward to coalesce with free half of tooth plate of previous foramen, free half of tooth plate projecting through aperture at one extremity and bisecting it, narrowing rapidly inward, tooth plate thus being trough-shaped structure with concave portion alternately turning from one side to opposite in successive chambers.