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Globoconusa
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Globigerinidae
Subfamily:
Globigerininae
Formal Genus Name and Reference:
Globoconusa KHALILOV, 1956, *1037, p. 249
Type Species:
G. conusa (=Globigerina daubjergensis BRÖNNIMANN, 1953, *230, p. 340), OD
Images
(Click to enlarge in a new window)
Fig. 538,1,2. *G. daubjergensis (BRONNIMANN), Sweden (1), USA(Tex.) (2); 1a-e, opposite sides and edge of low-spired hypotype; 2a-e, opposite sides and edge of high-spired hypotype, X146 (*1174)
Synonyms
Geographic Distribution
Eu.-N.Am.-Carib.-USSR-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.(Dan.)
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Paleoc.(Dan.)
Ending International Stage:
Danian
Fraction Up In Ending Stage:
100
Ending Date:
61.66
Description
Test small, trochospiral, similar to Globigerina, but commonly with strongly convex spiral side, chambers inflated and globular, increasing rapidly in size, wall characteristically spinose, aperture a small rounded umbilical opening, with one or more tiny secondary sutural openings on spiral side against early whorl. [The type-species, G. conllsa, was described from the Danian of Azerbaidzhan, but is apparently conspecific with Globigerina dallbjergensis, originally described from Denmark, but of world-wide occurrence in Danian strata. Although Globoconusa was described as high-spired, the type-species is quite variable as to height of spire.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Globigerinidae
Subfamily:
Globigerininae
Formal Genus Name and Reference:
Globoconusa KHALILOV, 1956, *1037, p. 249
Type Species:
G. conusa (=Globigerina daubjergensis BRÖNNIMANN, 1953, *230, p. 340), OD
Images
(Click to enlarge in a new window)
Fig. 538,1,2. *G. daubjergensis (BRONNIMANN), Sweden (1), USA(Tex.) (2); 1a-e, opposite sides and edge of low-spired hypotype; 2a-e, opposite sides and edge of high-spired hypotype, X146 (*1174)
Synonyms
Geographic Distribution
Eu.-N.Am.-Carib.-USSR-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.(Dan.)
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Paleoc.(Dan.)
Ending International Stage:
Danian
Fraction Up In Ending Stage:
100
Ending Date:
61.66
Description
Test small, trochospiral, similar to Globigerina, but commonly with strongly convex spiral side, chambers inflated and globular, increasing rapidly in size, wall characteristically spinose, aperture a small rounded umbilical opening, with one or more tiny secondary sutural openings on spiral side against early whorl. [The type-species, G. conllsa, was described from the Danian of Azerbaidzhan, but is apparently conspecific with Globigerina dallbjergensis, originally described from Denmark, but of world-wide occurrence in Danian strata. Although Globoconusa was described as high-spired, the type-species is quite variable as to height of spire.]