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Cribrononion
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Rotaliacea
Family:
Elphidiidae
Subfamily:
Elphidiinae
Formal Genus Name and Reference:
Cribrononion Thalmann, 1947, *1899c, p. 312
Type Species:
Nonionina heteropora EGGER, 1857, *657, p. 300, OD
Images
(Click to enlarge in a new window)
Fig. 509,1. °C. heleropomm (EGGER), Mio., Eu.(Bav.); 1a,b, side, edge views, showing pustulose apertural face, not an areal aperture, X60 (°700). -- Fig. 509 ,2,3. C. clarum (KRASHENINIKOV), M . Mio. (U.Torton.), Eu. (Ukraine); ?a,b, side and edge views of holotype showing arched slitlike foramen; 3, sec., X80 (*1054).--FIG. 509,4. C. eichwaldi (BOGDANOVICH), M.Mio.(U.Torton.), Eu.(Ukraine); 4a,b, side, edge news, X80 (*1054). -- Fig.. 509,5. C. incertum (WILLIAMSON), Rec., Arctic(lceland); axial sec. showing basal multiple foramen and canal system, enlarged (*946)
Synonyms
Nonion
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Mio.
Beginning International Stage:
Aquitanian
Fraction Up In Beginning Stage:
0
Beginning Date:
23.04
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test planispiral, bilaterally symmetrical, involute, chambers simple, sutures excavated to open into intraseptal canal, connecting to spiral canal at each side in umbilical region, no retral processes, but solid and imperforate septal bridges may occur; wall calcareous, coarsely perforate, radial in structure; aperture a single opening or row of pores at base of apertural face, single slitlike foramen in earlier septa possibly due to later resorption.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Rotaliacea
Family:
Elphidiidae
Subfamily:
Elphidiinae
Formal Genus Name and Reference:
Cribrononion Thalmann, 1947, *1899c, p. 312
Type Species:
Nonionina heteropora EGGER, 1857, *657, p. 300, OD
Images
(Click to enlarge in a new window)
Fig. 509,1. °C. heleropomm (EGGER), Mio., Eu.(Bav.); 1a,b, side, edge views, showing pustulose apertural face, not an areal aperture, X60 (°700). -- Fig. 509 ,2,3. C. clarum (KRASHENINIKOV), M . Mio. (U.Torton.), Eu. (Ukraine); ?a,b, side and edge views of holotype showing arched slitlike foramen; 3, sec., X80 (*1054).--FIG. 509,4. C. eichwaldi (BOGDANOVICH), M.Mio.(U.Torton.), Eu.(Ukraine); 4a,b, side, edge news, X80 (*1054). -- Fig.. 509,5. C. incertum (WILLIAMSON), Rec., Arctic(lceland); axial sec. showing basal multiple foramen and canal system, enlarged (*946)
Synonyms
Nonion
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Mio.
Beginning International Stage:
Aquitanian
Fraction Up In Beginning Stage:
0
Beginning Date:
23.04
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test planispiral, bilaterally symmetrical, involute, chambers simple, sutures excavated to open into intraseptal canal, connecting to spiral canal at each side in umbilical region, no retral processes, but solid and imperforate septal bridges may occur; wall calcareous, coarsely perforate, radial in structure; aperture a single opening or row of pores at base of apertural face, single slitlike foramen in earlier septa possibly due to later resorption.