Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Orbitolina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Orbitolinidae
Formal Genus Name and Reference:
Orbitolina D'ORBIGNY, 1850, *1397b, p. 143
Type Species:
Orbulites lenticulata Lamarck, 1816, *1088, p. 197 (=Madreporites lenticularis BLUMENBACH, 1805, *150b, p. lxxx), OD (M)
Images
(Click to enlarge in a new window)
Fig. 220,5,6. O. texana (Roemer), L.Cret.(Alb.), USA(Tex.), X20 (*611). --Fig. 220.7. O. mosae (Hofker), U.Cret.(Maastricht.), Fr., 7a,b, side and basal views, approx. X33 (*1353).
Synonyms
Geographic Distribution
equat. region, cosmop
Age Range
Beginning Stage in Treatise Usage:
L.Cret.(Barrem.)
Beginning International Stage:
Barremian
Fraction Up In Beginning Stage:
0
Beginning Date:
126.5
Ending Stage in Treatise Usage:
U.Cret.(Maastricht.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Test to 30 mm. diam.; main partitions zigzag, continuous through marginal and radial zones, thickened in upper portion of chambers; partitional pores prominent in some species, tending to interrupt partitions to form pillar-like structures in central area; marginal zone divided by partitions and one or more series of vertical and horizontal plates.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Orbitolinidae
Formal Genus Name and Reference:
Orbitolina D'ORBIGNY, 1850, *1397b, p. 143
Type Species:
Orbulites lenticulata Lamarck, 1816, *1088, p. 197 (=Madreporites lenticularis BLUMENBACH, 1805, *150b, p. lxxx), OD (M)
Images
(Click to enlarge in a new window)
Fig. 220,5,6. O. texana (Roemer), L.Cret.(Alb.), USA(Tex.), X20 (*611). --Fig. 220.7. O. mosae (Hofker), U.Cret.(Maastricht.), Fr., 7a,b, side and basal views, approx. X33 (*1353).
Synonyms
Geographic Distribution
equat. region, cosmop
Age Range
Beginning Stage in Treatise Usage:
L.Cret.(Barrem.)
Beginning International Stage:
Barremian
Fraction Up In Beginning Stage:
0
Beginning Date:
126.5
Ending Stage in Treatise Usage:
U.Cret.(Maastricht.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Test to 30 mm. diam.; main partitions zigzag, continuous through marginal and radial zones, thickened in upper portion of chambers; partitional pores prominent in some species, tending to interrupt partitions to form pillar-like structures in central area; marginal zone divided by partitions and one or more series of vertical and horizontal plates.