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Eponides

Classification

    Phylum:  
Protista
    Subphylum:  
Sarcodina
    Class:  
Reticularea
    Subclass:  
Granuloreticulosia
    Order:  
Foraminiferida
    Suborder:  
Rotalina
    Superfamily:  
Orbitoidacea
    Family:  
Eponididae
    Formal Genus Name and Reference:  
Eponides de MONTFORT, 1808, *1305, p. 127
    Type Species:  
Eponides de Montfort, 1808, *1305, p. 127 *Nautilus repandus Fichtel & MOLL, 1798, *716, p. 35, OD


Images

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Fig. 544,1. *E. repandus (Fichtel & Moll), Rec., Italy(Gulf Naples), 1a-c, opposite sides and edge view of neotype, X39. (*1186).


Synonyms

Pulvinulus, Nautilus


Geographic Distribution

cosmop.


Age Range

    Beginning Stage in Treatise Usage:  
Eoc.
    Beginning International Stage:  
Ypresian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
56
    Ending Stage in Treatise Usage:  
Rec.
    Ending International Stage:  
Meghalayan
    Fraction Up In Ending Stage:  
100
    Ending Date:  
0


Description

Test free, trochospiral, biconvex, periphery angled to distinctly carinate with narrow to broad depression in umbilical region (pseudoumbilicus), septa double, with intraseptal passages, sutures curved on spiral side, nearly radial to curved or sigmoid on umbilical side, wall calcareous, finely perforate, radial in structure, bilamellar, with septa primarily doubled, surface may have secondarily formed pustules or ridges formed on previous whorl below aperture, primary aperture an interiomarginal arch without internal tooth plate, intercameral foramen may be restricted and partly areal in position.




References

Montfort, Denys de, 1808, Conchyliologie systématique et classification methodique des coquilles: v. 1, 1xxxvii+409 p.


Museum or Author Information