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Pseudorbitolina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Soritidae
Subfamily:
Meandropsininae
Formal Genus Name and Reference:
Pseudorbitolina DOUVILLÉ, 1910, *619, p. 57
Type Species:
P. marthae, OD
Images
(Click to enlarge in a new window)
Fig. 378, 2,3. *P. marthae, U.Cret.(Dordon.), Fr.; 2a,b, convex upper and concave lower surfaces showing peripheral row of openings, X 10; 3, axial sec. showing partitions and canal openings, X27 (*619).
Synonyms
Geographic Distribution
Fr.-Arabia-Carib.
Age Range
Beginning Stage in Treatise Usage:
U. Cret.(Maastricht.)
Beginning International Stage:
Maastrichtian
Fraction Up In Beginning Stage:
0
Beginning Date:
72.17
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test low conical to concavoconvex, with transverse and parallel subepidermal partitions on one side of test, transverse partitions thickening inward to form chamberlets, wall agglutinated, convex side with concentric growth lines and reticulate surface, aperture consisting of single row of openings near periphery of concave side, which open into annular canal.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Soritidae
Subfamily:
Meandropsininae
Formal Genus Name and Reference:
Pseudorbitolina DOUVILLÉ, 1910, *619, p. 57
Type Species:
P. marthae, OD
Images
(Click to enlarge in a new window)
Fig. 378, 2,3. *P. marthae, U.Cret.(Dordon.), Fr.; 2a,b, convex upper and concave lower surfaces showing peripheral row of openings, X 10; 3, axial sec. showing partitions and canal openings, X27 (*619).
Synonyms
Geographic Distribution
Fr.-Arabia-Carib.
Age Range
Beginning Stage in Treatise Usage:
U. Cret.(Maastricht.)
Beginning International Stage:
Maastrichtian
Fraction Up In Beginning Stage:
0
Beginning Date:
72.17
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test low conical to concavoconvex, with transverse and parallel subepidermal partitions on one side of test, transverse partitions thickening inward to form chamberlets, wall agglutinated, convex side with concentric growth lines and reticulate surface, aperture consisting of single row of openings near periphery of concave side, which open into annular canal.