Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Opertorbitolites
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Soritidae
Subfamily:
Soritinae
Formal Genus Name and Reference:
Opertorbitolites NUTTALL, 1925, *1368, p. 447
Type Species:
O. douvillei, OD
Images
(Click to enlarge in a new window)
Fig. 385,8,9. *O. douvillei, 8, central portion of axial sec. of holotype, 9, equat. sec. passing through chambers in median plane, both X16 (*1368)
Synonyms
Geographic Distribution
Baluch
Age Range
Beginning Stage in Treatise Usage:
L. Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
L. Eoc.
Ending International Stage:
Ypresian
Fraction Up In Ending Stage:
100
Ending Date:
48.07
Description
Test lenticular, with median layer of annular chambers similar to Orbitolites, chambers of successive annuli arranged alternately but with thick imperforate laminae on either side of chamber layer, laminae closely adjacent rather than enclosing vacuoles, as in Somalina
References
Nuttall, W. L. F., 1925, Two species of Eocene Foraminitera from India; Alveolina elliptica and Dictyoconoides cooki: Ann. \& Mag. Nat. History, ser. 9, v. 16, p. 378-388, pl. $20-$ 21.-(1368) 1925, The stratigraphy of the Laki Series (Lower Eocene) of parts of Sind and Baluchistan (India); with a description of the larger Foraminifera contained in those beds: Geol. Soc. London, Quart. Jour., v. 81, pt. 3, p. 417-453, pl. 23-27, text-fig. 1-5, 1 table.-(1369) 1926, The zonal distribution of the larger Foraminifera of the Eocene of Western India: Geol. Mag., v. 63, p. 495-504, table 1-4.—(1370) 1928, Notes on the Tertiary Foraminifera of southern Mex- ico: Jour. Paleontology, v. 2, p. 372-376, pl. 50.——(1371) 1930, Eocene Foraminitera from Mexico: Same, v. 4, p. 271-293, pl. 23-25. -(1371A) 1932, Lower Oligocene Foraminifera from Mexico: Same, v. 6, p. 3-35, pl. 1-9.-(1372) 1933, Two species of Miogypsina from the Oligocene of Mexico: Same, v. 7, p. 175-177, pl. 24.
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Soritidae
Subfamily:
Soritinae
Formal Genus Name and Reference:
Opertorbitolites NUTTALL, 1925, *1368, p. 447
Type Species:
O. douvillei, OD
Images
(Click to enlarge in a new window)
Fig. 385,8,9. *O. douvillei, 8, central portion of axial sec. of holotype, 9, equat. sec. passing through chambers in median plane, both X16 (*1368)
Synonyms
Geographic Distribution
Baluch
Age Range
Beginning Stage in Treatise Usage:
L. Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
L. Eoc.
Ending International Stage:
Ypresian
Fraction Up In Ending Stage:
100
Ending Date:
48.07
Description
Test lenticular, with median layer of annular chambers similar to Orbitolites, chambers of successive annuli arranged alternately but with thick imperforate laminae on either side of chamber layer, laminae closely adjacent rather than enclosing vacuoles, as in Somalina
References
Nuttall, W. L. F., 1925, Two species of Eocene Foraminitera from India; Alveolina elliptica and Dictyoconoides cooki: Ann. \& Mag. Nat. History, ser. 9, v. 16, p. 378-388, pl. $20-$ 21.-(1368) 1925, The stratigraphy of the Laki Series (Lower Eocene) of parts of Sind and Baluchistan (India); with a description of the larger Foraminifera contained in those beds: Geol. Soc. London, Quart. Jour., v. 81, pt. 3, p. 417-453, pl. 23-27, text-fig. 1-5, 1 table.-(1369) 1926, The zonal distribution of the larger Foraminifera of the Eocene of Western India: Geol. Mag., v. 63, p. 495-504, table 1-4.—(1370) 1928, Notes on the Tertiary Foraminifera of southern Mex- ico: Jour. Paleontology, v. 2, p. 372-376, pl. 50.——(1371) 1930, Eocene Foraminitera from Mexico: Same, v. 4, p. 271-293, pl. 23-25. -(1371A) 1932, Lower Oligocene Foraminifera from Mexico: Same, v. 6, p. 3-35, pl. 1-9.-(1372) 1933, Two species of Miogypsina from the Oligocene of Mexico: Same, v. 7, p. 175-177, pl. 24.