Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Nonionella
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Nonionidae
Subfamily:
Nonioninae
Formal Genus Name and Reference:
Nonionella CUSHMAN, 1926, *426, p. 64
Type Species:
N. miocenica, OD
Images
(Click to enlarge in a new window)
Fig. 613,1. *N. miocenica, Mio., USA(Calif.), la-c, opp. sides and edge view, X101 (*2117).
Synonyms
Nonionella
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, trochospiral, slightly compressed, periphery rounded, spiral side partially evolute with umbonal boss, opposite side involute with final chamber overhanging umbilical region and may appear to form distinct umbilical flap, chambers relatively numerous, broad, low, wall calcareous, perforate, granular in structure, aperture interiomarginal, a low arch near periphery extending somewhat onto umbilical side. [Differs from Nonion in being asymmetrical and trochospiral, and in possessing an asymmetrically developed final chamber.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Nonionidae
Subfamily:
Nonioninae
Formal Genus Name and Reference:
Nonionella CUSHMAN, 1926, *426, p. 64
Type Species:
N. miocenica, OD
Images
(Click to enlarge in a new window)
Fig. 613,1. *N. miocenica, Mio., USA(Calif.), la-c, opp. sides and edge view, X101 (*2117).
Synonyms
Nonionella
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test free, trochospiral, slightly compressed, periphery rounded, spiral side partially evolute with umbonal boss, opposite side involute with final chamber overhanging umbilical region and may appear to form distinct umbilical flap, chambers relatively numerous, broad, low, wall calcareous, perforate, granular in structure, aperture interiomarginal, a low arch near periphery extending somewhat onto umbilical side. [Differs from Nonion in being asymmetrical and trochospiral, and in possessing an asymmetrically developed final chamber.]