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Cornuloculina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Nubeculariidae
Subfamily:
Ophthalmidiinae
Formal Genus Name and Reference:
Cornuloculina BURBACH, 1886, *253b, p. 497
Type Species:
Hauerina inconstans BRADY, 1879, *196b, p. 268, SD Loeblich & Tappan, herein
Images
(Click to enlarge in a new window)
Fig. 340,3-7. *. inconstans (Brady), off Brazil (3-6), S.Pac. (7), 3-5, topotypes, showing various stages of development from early planispiral tubular chamber to 2 or more chambers to whorl, X31(*2117), 6, microspheric topotype in transmitted light, X30, megalospheric hypotype in transmitted light, X50 (*2074).
Synonyms
Geographic Distribution
Jur.-Rec., S.Atl.O.-S. Pac.O.-Eu.
Age Range
Beginning Stage in Treatise Usage:
Jur.
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, planispirally coiled and evolute, globular proloculus followed by planispirally wound tubular second chamber of up to 3 whorls, followed by chambers of approximately one-half coil in length, or slightly less, resulting in 2.5 to 3 chambers to whorl in later stages, chambers somewhat loosely coiled, those of adjacent whorls being separated by thin plate, wall calcareous, imperforate, aperture at open end of final chamber. [Cornuloculina is separated from Ophthalmidium in the less regular coiling with more than 2 chambers in each whorl.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Nubeculariidae
Subfamily:
Ophthalmidiinae
Formal Genus Name and Reference:
Cornuloculina BURBACH, 1886, *253b, p. 497
Type Species:
Hauerina inconstans BRADY, 1879, *196b, p. 268, SD Loeblich & Tappan, herein
Images
(Click to enlarge in a new window)
Fig. 340,3-7. *. inconstans (Brady), off Brazil (3-6), S.Pac. (7), 3-5, topotypes, showing various stages of development from early planispiral tubular chamber to 2 or more chambers to whorl, X31(*2117), 6, microspheric topotype in transmitted light, X30, megalospheric hypotype in transmitted light, X50 (*2074).
Synonyms
Geographic Distribution
Jur.-Rec., S.Atl.O.-S. Pac.O.-Eu.
Age Range
Beginning Stage in Treatise Usage:
Jur.
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, planispirally coiled and evolute, globular proloculus followed by planispirally wound tubular second chamber of up to 3 whorls, followed by chambers of approximately one-half coil in length, or slightly less, resulting in 2.5 to 3 chambers to whorl in later stages, chambers somewhat loosely coiled, those of adjacent whorls being separated by thin plate, wall calcareous, imperforate, aperture at open end of final chamber. [Cornuloculina is separated from Ophthalmidium in the less regular coiling with more than 2 chambers in each whorl.]