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Archaias

Classification

    Phylum:  
Protista
    Subphylum:  
Sarcodina
    Class:  
Reticularea
    Subclass:  
Granuloreticulosia
    Order:  
Foraminiferida
    Suborder:  
Miliolina
    Superfamily:  
Miliolacea
    Family:  
Soritidae
    Subfamily:  
Archaiasinae
    Formal Genus Name and Reference:  
Archaias de MONTFORT, 1808, *1305, p. 190
    Type Species:  
A. spirans ( =Nautilus angulatus Fichtel & MOLL, 1798, *716, p. 113), OD


Images

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Fig. 382,1-5. *A. angulatus (FICHTEL & MOLL), Rec., Bermuda (1,2), Barbados (3-5) ; 1a,b, side, apert. views, X 19 (*2117); 2, side view of juvenile specimen, X 19; 3, equat. sec. of microspheric test, X 8; 4, equat. sec. of megalospheric test, X 13; 5, axial sec. of megalospheric test, X 13 (*1806).


Synonyms

Helenis, Nautilus


Geographic Distribution

cosmop.


Age Range

    Beginning Stage in Treatise Usage:  
M.Eoc.
    Beginning International Stage:  
Lutetian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
48.07
    Ending Stage in Treatise Usage:  
Rec.
    Ending International Stage:  
Meghalayan
    Fraction Up In Ending Stage:  
100
    Ending Date:  
0


Description

Test compressed, early stage planispiral, involute, later chambers /Iaring, becoming evolute to cyclical; interior of chambers with interseptal pillars; aperture multiple, with rows of pores on terminal face of final chamber.




References

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


Museum or Author Information