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Subbotina

Classification

    Phylum:  
Protista
    Subphylum:  
Sarcodina
    Class:  
Reticularea
    Subclass:  
Granuloreticulosia
    Order:  
Foraminiferida
    Suborder:  
Rotalina
    Superfamily:  
Globigerinacea
    Family:  
Globigerinidae
    Subfamily:  
Globigerininae
    Formal Genus Name and Reference:  
Subbotina Brotzen & POZARYSKA, 1961, 243, p. 160
    Type Species:  
Globigerina triloculinoides PLUMMER, 1927, *1461, p. 134, OD


Images

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Fig. 539, 3. *S. triloculinoides (Plummer), Midway., USA (Tex.), 3a-c, opposite sides and edge view of topotype, X73 (*1174).


Synonyms



Geographic Distribution

cosmop


Age Range

    Beginning Stage in Treatise Usage:  
Paleoc.(Dan.)
    Beginning International Stage:  
Danian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
66.04
    Ending Stage in Treatise Usage:  
Rec.
    Ending International Stage:  
Meghalayan
    Fraction Up In Ending Stage:  
100
    Ending Date:  
0


Description

Test trochospiral, chambers increasing rapidly in size and strongly inflated, sutures depressed, wall calcareous, perforate, radial in structure, surface reticulate or pitted, rather than spinose, aperture umbilical-extraumbilical, with distinct lip. [Originally defined solely on the basis of wall surface, the present genus apparently ineludes species which are closely similar in form and apertural character. The coarsely pitted surface is found in species with low and slightly extraumbilical aperture and distinctive lip, none of which are found in typical Globigerina.]




References

Brotzen, Fritz, , \& Pozaryska, K. 1961, Foraminifères du Paléocène et de l'Êocène inférieur en Pologne septentrionale remarques paleogéographiques: Revue Micropaléont., v. 4, no. 3, p. 155-166, pl. 1-4.


Museum or Author Information