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Triloculina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Miliolidae
Subfamily:
Quinqueloculininae
Formal Genus Name and Reference:
Triloculina D'ORBIGNY, 1826, *1391, p. 299
Type Species:
Miliolites trigonula Lamarck, 1804, *1085c, p. 351, SD CUSHMAN, 1917, *404f, p. 65
Images
(Click to enlarge in a new window)
Fig. 353,4. *T. trigonula (Lamarck), Eoc. (Lutet.), Eu.(Hauteville, Fr.), 4 a-c, opposite sides, apert. view, X31 (*2117). --Fig. 354. T. rotunda d'Orbigny, Rec., Atl.O.; biflagellate gamete with axostyle, X6,000 (*820a).
Synonyms
Renoidea
Geographic Distribution
cosmop.
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, with chambers each one-half coil in length, early chambers at least in microspheric generation in quinqueloculine arrangement, later triloculine, with successive chambers added in planes 120° apart, only final 3 chambers visible externally, wall calcareous, imperforate, porcelaneous, or rarely with surficial agglutinated layer, aperture terminal, typically with bifid tooth, gametes biflagellate, with axostyle. [Triloculina differs from Quinqueloculina in its later triloculine development, from Miliolinella in having a bifid tooth instead of a broad apertural flap, and from Cruciloculina in having a simple, rounded aperture with a bifid tooth.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Miliolina
Superfamily:
Miliolacea
Family:
Miliolidae
Subfamily:
Quinqueloculininae
Formal Genus Name and Reference:
Triloculina D'ORBIGNY, 1826, *1391, p. 299
Type Species:
Miliolites trigonula Lamarck, 1804, *1085c, p. 351, SD CUSHMAN, 1917, *404f, p. 65
Images
(Click to enlarge in a new window)
Fig. 353,4. *T. trigonula (Lamarck), Eoc. (Lutet.), Eu.(Hauteville, Fr.), 4 a-c, opposite sides, apert. view, X31 (*2117). --Fig. 354. T. rotunda d'Orbigny, Rec., Atl.O.; biflagellate gamete with axostyle, X6,000 (*820a).
Synonyms
Renoidea
Geographic Distribution
cosmop.
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, with chambers each one-half coil in length, early chambers at least in microspheric generation in quinqueloculine arrangement, later triloculine, with successive chambers added in planes 120° apart, only final 3 chambers visible externally, wall calcareous, imperforate, porcelaneous, or rarely with surficial agglutinated layer, aperture terminal, typically with bifid tooth, gametes biflagellate, with axostyle. [Triloculina differs from Quinqueloculina in its later triloculine development, from Miliolinella in having a bifid tooth instead of a broad apertural flap, and from Cruciloculina in having a simple, rounded aperture with a bifid tooth.]