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Gyroidinoides
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Osangulariidae
Formal Genus Name and Reference:
Gyroidinoides BROTZEN, 1942, *240, p. 19
Type Species:
Rotalina nitida Reuss, 1844, *1537, p. 21, OD
Images
(Click to enlarge in a new window)
Fig. 615,6. *G. nitida (Reuss), U. Cret.(Turon.), Sweden, 6a-c, opp. sides and edge view, X74 (*2117).
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, trochospiral, spiral side flattened, umbilical side elevated, periphery rounded, chambers rhomboidal in section, sutures radial to curved, flush to depressed; wall calcareous, perforate, bilamellar, granular in structure; aperture a continuous, low, interiomarginal slit extending from periphery to umbilicus, umbilical portion partially obscured by umbilical flap from each chamber.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Osangulariidae
Formal Genus Name and Reference:
Gyroidinoides BROTZEN, 1942, *240, p. 19
Type Species:
Rotalina nitida Reuss, 1844, *1537, p. 21, OD
Images
(Click to enlarge in a new window)
Fig. 615,6. *G. nitida (Reuss), U. Cret.(Turon.), Sweden, 6a-c, opp. sides and edge view, X74 (*2117).
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, trochospiral, spiral side flattened, umbilical side elevated, periphery rounded, chambers rhomboidal in section, sutures radial to curved, flush to depressed; wall calcareous, perforate, bilamellar, granular in structure; aperture a continuous, low, interiomarginal slit extending from periphery to umbilicus, umbilical portion partially obscured by umbilical flap from each chamber.