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Discocyclina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Orbitoidacea
Family:
Discocyclinidae
Formal Genus Name and Reference:
Discocyclina GUMBEL, 1870, *840, p. 687
Type Species:
Orbitulites pratti MICHELIN, 1846, *1255, p. 278; SD GALLOWAY, 1928, *761, p. 56]
Images
(Click to enlarge in a new window)
Fig. 587,1. *D. (D.) pratti (Michelin), Eoc.(Auvers.), Eu., 1a, ext. view, X5 (*2042), 1b, equat. sec. with embryonic chambers, periembryonic chambers and equat. chambers, X40 (*2042), 1c, equat. chambers with proximally situated annular stolon, X85 (*1994)
Synonyms
Rhipidocyclina, Orbitoclypeus
Geographic Distribution
Eu.-Indo.-Pac. Reg.-N.Am.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test circular in plan, discoidal or lenticular, with or without raised radiating ribs; annular stolon proximally situated; radial chamber walls of equatorial chambers in adjacent annuli usually alternating in position.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Orbitoidacea
Family:
Discocyclinidae
Formal Genus Name and Reference:
Discocyclina GUMBEL, 1870, *840, p. 687
Type Species:
Orbitulites pratti MICHELIN, 1846, *1255, p. 278; SD GALLOWAY, 1928, *761, p. 56]
Images
(Click to enlarge in a new window)
Fig. 587,1. *D. (D.) pratti (Michelin), Eoc.(Auvers.), Eu., 1a, ext. view, X5 (*2042), 1b, equat. sec. with embryonic chambers, periembryonic chambers and equat. chambers, X40 (*2042), 1c, equat. chambers with proximally situated annular stolon, X85 (*1994)
Synonyms
Rhipidocyclina, Orbitoclypeus
Geographic Distribution
Eu.-Indo.-Pac. Reg.-N.Am.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test circular in plan, discoidal or lenticular, with or without raised radiating ribs; annular stolon proximally situated; radial chamber walls of equatorial chambers in adjacent annuli usually alternating in position.