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Orbitoides

Classification

    Phylum:  
Protista
    Subphylum:  
Sarcodina
    Class:  
Reticularea
    Subclass:  
Granuloreticulosia
    Order:  
Foraminiferida
    Suborder:  
Rotalina
    Superfamily:  
Orbitoidacea
    Family:  
Orbitoididae
    Formal Genus Name and Reference:  
Orbitoides d'Orbigny in LYELL, 1848, *1192, p. 12
    Type Species:  
Lycophris faujasii Defrance, 1823, *579b, p. 271, = Orbitolites media d’Archiac, 1837, *35, p. 178, SD Jones, Parker, & BRADY, 1866, *1002, appendix I


Images

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Fig. 584,3. *O. faujasii (Defrance), Fr., 3a,b, equat. sec. vert. sec., X40, X20 (*2113c)


Synonyms

Hymenocyclus


Geographic Distribution

Eu.-Asia(India)-N.Am.


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:  
U.Cret.
    Ending International Stage:  
Maastrichtian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
66.04


Description

Embryonic chambers surrounded by thick, perforated wall, bilocular to quadrilocular, or teratologically with more than 4 irregularly arranged chambers, equatorial chambers arcuate, lateral chambers reduced or well developed, slitlike




References

Lyell, Charles, 1848, On the relative age and position of the so-called Nummulite limestone of Alabama: Geol. Soc. London, Quart. Jour., v. 4, p. 10-16.


Museum or Author Information