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Osangularia
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Osangulariidae
Formal Genus Name and Reference:
Osangularia BROTZEN, 1940, *239, p. 30
Type Species:
O. lens, OD
Images
(Click to enlarge in a new window)
Fig. 615,1,2. *O. lens, Paleoc.(Dan.), Sweden, la-c, opp. sides and edge view, X111 (*2117); 2, horiz. sec., areal apert. openings visible in septa at lower left of figure, X55 (*1530). -- Fig. 615,3,4. O. bengalensis (Schwager), Mio., Asia(Israel), 3, apert. view showing areal opening; 4, interior, from umbilical side with wall removed, showing bulging chamber ends, areal aperture and lip, and apert. face indentation extending to previous septum, all X45 (*1533)
Synonyms
Parrella
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
L.Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, trochospiral, lenticular, biumbonate, periphery carinate, all whorls visible on spiral side, only final whorl visible on opposite side, chambers increasing gradually in size, sutures curved and oblique on spiral side, radial and sinuate on umbilical side, wall calcareous, finely perforate, granular in structure, bilamellar, aperture a bent opening, lying along base of final chamber on umbilical side and bending at oblique angle up apertural face, or 2 angles may be separated openings, one interiomarginal and one areal.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Osangulariidae
Formal Genus Name and Reference:
Osangularia BROTZEN, 1940, *239, p. 30
Type Species:
O. lens, OD
Images
(Click to enlarge in a new window)
Fig. 615,1,2. *O. lens, Paleoc.(Dan.), Sweden, la-c, opp. sides and edge view, X111 (*2117); 2, horiz. sec., areal apert. openings visible in septa at lower left of figure, X55 (*1530). -- Fig. 615,3,4. O. bengalensis (Schwager), Mio., Asia(Israel), 3, apert. view showing areal opening; 4, interior, from umbilical side with wall removed, showing bulging chamber ends, areal aperture and lip, and apert. face indentation extending to previous septum, all X45 (*1533)
Synonyms
Parrella
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
L.Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, trochospiral, lenticular, biumbonate, periphery carinate, all whorls visible on spiral side, only final whorl visible on opposite side, chambers increasing gradually in size, sutures curved and oblique on spiral side, radial and sinuate on umbilical side, wall calcareous, finely perforate, granular in structure, bilamellar, aperture a bent opening, lying along base of final chamber on umbilical side and bending at oblique angle up apertural face, or 2 angles may be separated openings, one interiomarginal and one areal.