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Hantkenina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Hantkeninidae
Subfamily:
Hantkenininae
Formal Genus Name and Reference:
Hantkenina CUSHMAN, 1924, *419, p. 1
Type Species:
H. alabamensis, OD
Images
(Click to enlarge in a new window)
Fig. 532,1. * H. alabamensis, U.Eoc.(Jackson.), USA(Ala.), 1a,b, side, edge views, X27 (*164). -- Fig. 532,2. H. aragonensis Nuttall, Eoc., Mex., 2a,b, side, apert. view of paratype, X45 (*164). -- Fig. 532,3. H. dumblei Weinzierl & Applin, Eoc., USA(Tex.), side view of lectotype, X50 (*164).
Synonyms
Hantkenia
Geographic Distribution
N.Am.-Eu.-S.Am.-Afr.-M.East-Austra-lia-N.Z.-E.Indies(Borneo)
Age Range
Beginning Stage in Treatise Usage:
Eoc.(Ypres.)
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Eoc.(Wemmel.)
Ending International Stage:
Lutetian
Fraction Up In Ending Stage:
100
Ending Date:
41.03
Description
Test free, planispiral, involute, biconvex, biumbilicate, chambers rounded, ovate or radial elongate, generally with single relatively long, heavy spine at forward margin of each chamber on periphery and in the plane of coiling, although spines rarely are absent on one or more chambers, sutures depressed, radial, wall calcareous, finely perforate, radial in structure, surface finely hispid, especially in area just beneath aperture on previous whorl, primary aperture interiomarginal, equatorial, triradiate, 2 "rays" forming slit across base of final chamber face, third ray arising from center of this slit and extending up face toward peripheral spine, flaring slightly to become rounded at its upper end, vertical slit bordered laterally by apertural flanges which join above as narrow lip
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:
Hantkenina CUSHMAN, 1924, *419, p. 1
Type Species:
H. alabamensis, OD
Images
(Click to enlarge in a new window)
Fig. 532,1. * H. alabamensis, U.Eoc.(Jackson.), USA(Ala.), 1a,b, side, edge views, X27 (*164). -- Fig. 532,2. H. aragonensis Nuttall, Eoc., Mex., 2a,b, side, apert. view of paratype, X45 (*164). -- Fig. 532,3. H. dumblei Weinzierl & Applin, Eoc., USA(Tex.), side view of lectotype, X50 (*164).
Synonyms
Hantkenia
Geographic Distribution
N.Am.-Eu.-S.Am.-Afr.-M.East-Austra-lia-N.Z.-E.Indies(Borneo)
Age Range
Beginning Stage in Treatise Usage:
Eoc.(Ypres.)
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Eoc.(Wemmel.)
Ending International Stage:
Lutetian
Fraction Up In Ending Stage:
100
Ending Date:
41.03
Description
Test free, planispiral, involute, biconvex, biumbilicate, chambers rounded, ovate or radial elongate, generally with single relatively long, heavy spine at forward margin of each chamber on periphery and in the plane of coiling, although spines rarely are absent on one or more chambers, sutures depressed, radial, wall calcareous, finely perforate, radial in structure, surface finely hispid, especially in area just beneath aperture on previous whorl, primary aperture interiomarginal, equatorial, triradiate, 2 "rays" forming slit across base of final chamber face, third ray arising from center of this slit and extending up face toward peripheral spine, flaring slightly to become rounded at its upper end, vertical slit bordered laterally by apertural flanges which join above as narrow lip