Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Cribrohantkenina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Hantkeninidae
Subfamily:
Hantkenininae
Formal Genus Name and Reference:
Cribrohantkenina Thalmann, 1942, *1901, p. 812, 815, 819
Type Species:
Hantkenina (C.) bermudezi (=Hantkenina inflata HOWE, 1928, *968A, p. 14), OD
Images
(Click to enlarge in a new window)
Fig. 532,4. *C. inflata (HOWE), Jackson, USA (Ala.); 4a,b, side, apert. views, X50 (*164)
Synonyms
Geographic Distribution
N. Am.-W. Indies(Cuba)-Afr.
Age Range
Beginning Stage in Treatise Usage:
U.Eoc.
Beginning International Stage:
Priabonian
Fraction Up In Beginning Stage:
0
Beginning Date:
37.71
Ending Stage in Treatise Usage:
U.Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test free, planispiral, biumbilicate, chambers subglobular, with prominent peripheral spine at forward margin of each chamber, succeeding chambers attached near base of spines, may partially or completely envelop spine of preceding chamber, sutures distinct, depressed, radial, wall calcareous, perforate, surface smooth, finely punctate, or finely spinose, primary aperture interiomarginal, equatorial, secondary multiple areal aperture consisting of small rounded or elongate openings above primary interiomarginal aperture, in well-developed specimens terminal portion of chamber may form a protruding "pore-plate," which lacks fine perforations in area between apertural pores and may cover primary interiomarginal aperture, attaching to peripheral margin of previous whorl, primary interiomarginal aperture and secondary areal apertures commonly bordered by distinct protruding lips, and multiple secondary openings may rarely be filled by later-formed shell growth. [Differs from Hantkenina in having the secondary multiple areal aperture in the region between the final spine and the primary interiomarginal aper-
ture.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Hantkeninidae
Subfamily:
Hantkenininae
Formal Genus Name and Reference:
Cribrohantkenina Thalmann, 1942, *1901, p. 812, 815, 819
Type Species:
Hantkenina (C.) bermudezi (=Hantkenina inflata HOWE, 1928, *968A, p. 14), OD
Images
(Click to enlarge in a new window)
Fig. 532,4. *C. inflata (HOWE), Jackson, USA (Ala.); 4a,b, side, apert. views, X50 (*164)
Synonyms
Geographic Distribution
N. Am.-W. Indies(Cuba)-Afr.
Age Range
Beginning Stage in Treatise Usage:
U.Eoc.
Beginning International Stage:
Priabonian
Fraction Up In Beginning Stage:
0
Beginning Date:
37.71
Ending Stage in Treatise Usage:
U.Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test free, planispiral, biumbilicate, chambers subglobular, with prominent peripheral spine at forward margin of each chamber, succeeding chambers attached near base of spines, may partially or completely envelop spine of preceding chamber, sutures distinct, depressed, radial, wall calcareous, perforate, surface smooth, finely punctate, or finely spinose, primary aperture interiomarginal, equatorial, secondary multiple areal aperture consisting of small rounded or elongate openings above primary interiomarginal aperture, in well-developed specimens terminal portion of chamber may form a protruding "pore-plate," which lacks fine perforations in area between apertural pores and may cover primary interiomarginal aperture, attaching to peripheral margin of previous whorl, primary interiomarginal aperture and secondary areal apertures commonly bordered by distinct protruding lips, and multiple secondary openings may rarely be filled by later-formed shell growth. [Differs from Hantkenina in having the secondary multiple areal aperture in the region between the final spine and the primary interiomarginal aper-
ture.]