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Cassigerinella
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Hantkeninidae
Subfamily:
Cassigerinellinae
Formal Genus Name and Reference:
Cassigerinella POKORNÝ, 1955, *1475, p. 136
Type Species:
C. boudecensis, OD
Images
(Click to enlarge in a new window)
Fig. 532,5. *C. boudecensis, M.Oligo., Eu.(Czech.), Sa-c, opposite sides and edge view showing biserial enrolled test and arched aperture, X219 (*164)"
Synonyms
Geographic Distribution
Eu.-N. Am.-Carib.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Oligo.
Beginning International Stage:
Rupelian
Fraction Up In Beginning Stage:
0
Beginning Date:
33.9
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Test free, robust, early portion planispiral and similar to Hastigerina, later with biserially arranged chambers continuing to spiral in same plane, biumbilicate, periphery broadly rounded, chambers globular to ovate and only few pairs arranged as in Cassidulina to each whorl of test, sutures distinct, depressed, radial to curved, wall calcareous, perforate, radial in structure, surface smooth to pitted, aperture interiomarginal, an extraumbilical arch alternating in position from one side to next in successive chambers. [Differs from Cassidulina in having a perforate radial rather than granular wall structure and in having an early planispiral stage.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Globigerinacea
Family:
Hantkeninidae
Subfamily:
Cassigerinellinae
Formal Genus Name and Reference:
Cassigerinella POKORNÝ, 1955, *1475, p. 136
Type Species:
C. boudecensis, OD
Images
(Click to enlarge in a new window)
Fig. 532,5. *C. boudecensis, M.Oligo., Eu.(Czech.), Sa-c, opposite sides and edge view showing biserial enrolled test and arched aperture, X219 (*164)"
Synonyms
Geographic Distribution
Eu.-N. Am.-Carib.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Oligo.
Beginning International Stage:
Rupelian
Fraction Up In Beginning Stage:
0
Beginning Date:
33.9
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Test free, robust, early portion planispiral and similar to Hastigerina, later with biserially arranged chambers continuing to spiral in same plane, biumbilicate, periphery broadly rounded, chambers globular to ovate and only few pairs arranged as in Cassidulina to each whorl of test, sutures distinct, depressed, radial to curved, wall calcareous, perforate, radial in structure, surface smooth to pitted, aperture interiomarginal, an extraumbilical arch alternating in position from one side to next in successive chambers. [Differs from Cassidulina in having a perforate radial rather than granular wall structure and in having an early planispiral stage.]