Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Orbitolinella
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Dicyclinidae
Subfamily:
Dicyclininae
Formal Genus Name and Reference:
Orbitolinella HENSON, 1948, *902, p. 90
Type Species:
O. depressa, OD
Images
(Click to enlarge in a new window)
Fig. 213,1-3. *O. depressa, 1, subaxial sec. of syntype, X38, 2, oblique tang. sec. showing more numerous partitions in outer layer (at top of figure), X60, 3, oblique transv. sec. of syntype intersecting 6 chambers at outer edge and showing reticulate appearance of central part, X30 (*2115)
Synonyms
Geographic Distribution
Asia(Qatar Penin., Arabia)
Age Range
Beginning Stage in Treatise Usage:
U. Cret.(Cenoman.)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
U.Cret.(Turon.)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
100
Ending Date:
89.39
Description
Test conical, chambers arranged as in Orbitolina and subdivided by numerous subepidermal partitions, perpendicular to septa and outer walls and those of succeeding chambers in alignment, partitions becoming irregular toward center of chamber, forming reticulate zone, intercameral communication by means of pores in radial and inner reticulate zones but not in marginal area, wall granular or agglutinated calcareous, with vitreous layer over oral face (possibly originally pseudochitinoid).
References
Henson, F. R. S., 1948, Foraminifera of the genus Trocholina in the Middle East: Ann. \& Mag. Nat. History, ser. 11, v. 14 (1947), p. 445-459, pl. 11-13.-(901) 1948, New Trochamminidae and Verneuilinidae from the Middle East: Same, ser. 11, v. 14 (1947), p. 605-630, pl. 14-18.-(902) 1948, Larger imperforate Foraminifera of southwestern Asia, Families Lituolidae, Orbitolinidae and Meandropsinidae: British Museum (Nat. History), Mon., p. 1-127, pl. 1-16, fig. 1-16.——(903) 1950, Middle eastern Tertiary Peneroplidae (Foraminifera), with remarks on the phylogeny and taxonomy of the family: $70 \mathrm{p} ., 10 \mathrm{pl} ., 3$ text-fig., West Yorkshire Printing Co. (Wakefield, England).
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Dicyclinidae
Subfamily:
Dicyclininae
Formal Genus Name and Reference:
Orbitolinella HENSON, 1948, *902, p. 90
Type Species:
O. depressa, OD
Images
(Click to enlarge in a new window)
Fig. 213,1-3. *O. depressa, 1, subaxial sec. of syntype, X38, 2, oblique tang. sec. showing more numerous partitions in outer layer (at top of figure), X60, 3, oblique transv. sec. of syntype intersecting 6 chambers at outer edge and showing reticulate appearance of central part, X30 (*2115)
Synonyms
Geographic Distribution
Asia(Qatar Penin., Arabia)
Age Range
Beginning Stage in Treatise Usage:
U. Cret.(Cenoman.)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
U.Cret.(Turon.)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
100
Ending Date:
89.39
Description
Test conical, chambers arranged as in Orbitolina and subdivided by numerous subepidermal partitions, perpendicular to septa and outer walls and those of succeeding chambers in alignment, partitions becoming irregular toward center of chamber, forming reticulate zone, intercameral communication by means of pores in radial and inner reticulate zones but not in marginal area, wall granular or agglutinated calcareous, with vitreous layer over oral face (possibly originally pseudochitinoid).
References
Henson, F. R. S., 1948, Foraminifera of the genus Trocholina in the Middle East: Ann. \& Mag. Nat. History, ser. 11, v. 14 (1947), p. 445-459, pl. 11-13.-(901) 1948, New Trochamminidae and Verneuilinidae from the Middle East: Same, ser. 11, v. 14 (1947), p. 605-630, pl. 14-18.-(902) 1948, Larger imperforate Foraminifera of southwestern Asia, Families Lituolidae, Orbitolinidae and Meandropsinidae: British Museum (Nat. History), Mon., p. 1-127, pl. 1-16, fig. 1-16.——(903) 1950, Middle eastern Tertiary Peneroplidae (Foraminifera), with remarks on the phylogeny and taxonomy of the family: $70 \mathrm{p} ., 10 \mathrm{pl} ., 3$ text-fig., West Yorkshire Printing Co. (Wakefield, England).