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Umbella
Classification
Phylum:
Trace Fossils and Problematica
Class:
Microproblematica
Formal Genus Name and Reference:
Umbella Maslov in Bykova & POLENOVA, 1955, p. 40
Type Species:
*U. bella, OD
Images
(Click to enlarge in a new window)
Synonyms
Umbellina
Geographic Distribution
N.Am.(USA), Eu.(Belg., USSR), Australia
Age Range
Beginning Stage in Treatise Usage:
Dev.
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Dev.
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Globular to ovoid, hollow calcite bodies, long diameter as much as 0.45 mm., short diameters 0.40 mm.; shell composed of radially oriented calcite fibers, ranging from 10 to 150 microns in thickness. [Originally regarded as foraminifer; by others believed to be related to Charophyta or of uncertain affinities; name possibly applied to two different kinds of organisms (see Treatise, p. C322; TEICHERT, 1965, p. 103; POYARKOV, 1966; VEEVERS, 1970, p. 180; PECK, 1974)] [Description prepared by CURT TEICHERT.]
References
Museum or Author Information
Classification
Phylum:
Trace Fossils and Problematica
Class:
Microproblematica
Formal Genus Name and Reference:
Umbella Maslov in Bykova & POLENOVA, 1955, p. 40
Type Species:
*U. bella, OD
Images
(Click to enlarge in a new window)Synonyms
Umbellina
Geographic Distribution
N.Am.(USA), Eu.(Belg., USSR), Australia
Age Range
Beginning Stage in Treatise Usage:
Dev.
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Dev.
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Globular to ovoid, hollow calcite bodies, long diameter as much as 0.45 mm., short diameters 0.40 mm.; shell composed of radially oriented calcite fibers, ranging from 10 to 150 microns in thickness. [Originally regarded as foraminifer; by others believed to be related to Charophyta or of uncertain affinities; name possibly applied to two different kinds of organisms (see Treatise, p. C322; TEICHERT, 1965, p. 103; POYARKOV, 1966; VEEVERS, 1970, p. 180; PECK, 1974)] [Description prepared by CURT TEICHERT.]