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Nonion
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Nonionidae
Subfamily:
Nonioninae
Formal Genus Name and Reference:
Nonion de MONTFORT, 1808, *1305, p. 210
Type Species:
Nautilus incrassatus Fichtel & MOLL, 1798, *716, p. 38, OD
Images
(Click to enlarge in a new window)
Fig. 612,1. *N. incrassatus (Fichtel & Moll), Mio., Albania, 1a,b, side, edge views, X100 (*2019).
Synonyms
Nonionia
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
U.Cret., Paleoc.
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, planispiral and involute, slightly compressed, biumbonate, periphery rounded, peripheral outline lobulate, chambers numerous, increasing gradually in size as added, sutures distinct, depressed, radial, slightly curved, wall calcareous, finely perforate, granular in structure, surface smooth, umbonal region filled with secondarily deposited calcite, either as granules or solid boss, aperture an arched, equatorial, interiomarginal slit. [Differs from Melonis in having a filled, rather than open, umbilicus, thinner and more finely perforate and monolamellar walls (*1530). Many species previously included in Nonion should be referred to Melonis
or Florilus.)
References
Montfort, Denys de, 1808, Conchyliologie systématique et classification methodique des coquilles: v. 1, 1xxxvii+409 p.
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:
Nonion de MONTFORT, 1808, *1305, p. 210
Type Species:
Nautilus incrassatus Fichtel & MOLL, 1798, *716, p. 38, OD
Images
(Click to enlarge in a new window)
Fig. 612,1. *N. incrassatus (Fichtel & Moll), Mio., Albania, 1a,b, side, edge views, X100 (*2019).
Synonyms
Nonionia
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
U.Cret., Paleoc.
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, planispiral and involute, slightly compressed, biumbonate, periphery rounded, peripheral outline lobulate, chambers numerous, increasing gradually in size as added, sutures distinct, depressed, radial, slightly curved, wall calcareous, finely perforate, granular in structure, surface smooth, umbonal region filled with secondarily deposited calcite, either as granules or solid boss, aperture an arched, equatorial, interiomarginal slit. [Differs from Melonis in having a filled, rather than open, umbilicus, thinner and more finely perforate and monolamellar walls (*1530). Many species previously included in Nonion should be referred to Melonis
or Florilus.)
References
Montfort, Denys de, 1808, Conchyliologie systématique et classification methodique des coquilles: v. 1, 1xxxvii+409 p.