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Cycloclypeus
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Rotaliacea
Family:
Nummulitidae
Subfamily:
Cycloclypeinae
Formal Genus Name and Reference:
Cycloclypeus W. B. CARPENTER, 1856, *271a, p. 555
Type Species:
C. mammilatus CARTER, 1861, *287a, p. 461; SD (SM) CARTER, 1861, *287a, p. 461
Images
(Click to enlarge in a new window)
Fig. 521,1. *C. (C.) carpenteri, Rec., Bikini Atoll; la, med. sec., X32; 1b, transv. sec., X16 (*2113c)
Synonyms
Heteroclypeus
Geographic Distribution
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Microspheric generation initially like Heterostegina; megalospheric generation initially with bilocular embryonic chambers followed by heterostegine-like periembryonic chambers; later chambers in both generations annular, divided into rectangular chamberlets. [CARPENTER validly described Cycloclypeus in 1856 but included it in no named species. When CARTER (1861) referred his new species C. mammilatus to Cycloclypeus, this was the first specific taxon assigned and thus automatically was established as type-species-Ed.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Rotaliacea
Family:
Nummulitidae
Subfamily:
Cycloclypeinae
Formal Genus Name and Reference:
Cycloclypeus W. B. CARPENTER, 1856, *271a, p. 555
Type Species:
C. mammilatus CARTER, 1861, *287a, p. 461; SD (SM) CARTER, 1861, *287a, p. 461
Images
(Click to enlarge in a new window)
Fig. 521,1. *C. (C.) carpenteri, Rec., Bikini Atoll; la, med. sec., X32; 1b, transv. sec., X16 (*2113c)
Synonyms
Heteroclypeus
Geographic Distribution
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Microspheric generation initially like Heterostegina; megalospheric generation initially with bilocular embryonic chambers followed by heterostegine-like periembryonic chambers; later chambers in both generations annular, divided into rectangular chamberlets. [CARPENTER validly described Cycloclypeus in 1856 but included it in no named species. When CARTER (1861) referred his new species C. mammilatus to Cycloclypeus, this was the first specific taxon assigned and thus automatically was established as type-species-Ed.]