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Ammomarginulina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Lituolidae
Subfamily:
Lituolinae
Formal Genus Name and Reference:
Ammomarginulina Wiesner, 1931, *2063, p. 97
Type Species:
A. ensis, OD (M)
Images
(Click to enlarge in a new window)
Fig. 151,7. *A. ensis, Rec., Antarctic, holotype, X66 (*2063)
Synonyms
Geographic Distribution
Antarctic-Afr.-N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
Jur.
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test planispiral in early stage, later rectilinear, strongly compressed, sutures oblique, wall agglutinated, with very little cement, aperture terminal, eccentric, at dorsal angle of test. [MAYNC (*1240) stated that Ammobaculites compressa CUSHMAN & WATERS (M. Penn., Mich.) "should be referred to Ammomarginulina" and thus would extend the range of the genus to the Pennsylvanian. As A. compressa has neither the eccentric aperture at the dorsal angle nor the oblique sutures which characterize Ammomarginulina, we regard it as a true Ammobaculites.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Lituolidae
Subfamily:
Lituolinae
Formal Genus Name and Reference:
Ammomarginulina Wiesner, 1931, *2063, p. 97
Type Species:
A. ensis, OD (M)
Images
(Click to enlarge in a new window)
Fig. 151,7. *A. ensis, Rec., Antarctic, holotype, X66 (*2063)
Synonyms
Geographic Distribution
Antarctic-Afr.-N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
Jur.
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test planispiral in early stage, later rectilinear, strongly compressed, sutures oblique, wall agglutinated, with very little cement, aperture terminal, eccentric, at dorsal angle of test. [MAYNC (*1240) stated that Ammobaculites compressa CUSHMAN & WATERS (M. Penn., Mich.) "should be referred to Ammomarginulina" and thus would extend the range of the genus to the Pennsylvanian. As A. compressa has neither the eccentric aperture at the dorsal angle nor the oblique sutures which characterize Ammomarginulina, we regard it as a true Ammobaculites.]