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Ordosia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Cheilocephalidae
Formal Genus Name and Reference:
Ordosia LU, 1954
Type Species:
O. fimbricanda
Images
(Click to enlarge in a new window)
Fig. 233, 1. *O. fimbricauda, Inner Mongolia (Tsingshuiho dist.), a, b, cran., pyg., x5 (426).
Synonyms
Geographic Distribution
Up.M.Cam.(Kushanian), NE.Asia
Age Range
Beginning Stage in Treatise Usage:
Up.M.Cam.(Kushanian)
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Up.M.Cam.(Kushanian)
Ending International Stage:
Paibian
Fraction Up In Ending Stage:
0
Ending Date:
494.95
Description
Glabella moderately convex, truncate-tapering, with 2 or 3 pairs of short lateral furrows, narrow, restricted, concave preglabellar field, short occipital spine, faint eye ridges, eyes of medium size, opposite center of glabella, fixigenae with palpebral areas 0.75 of glabellar width, posterior areas narrow, long (tr.). Pygidium broadly semielliptical, axis about same in width as pleural fields, axis convex, tapered nearly full length, 7 or 8 axial rings, may have minute median axial nodes, 6 or 7 pleurae with distinct interpleural grooves and faint pleural furrows, border furrow narrow, distinct, border medium in width, concave. Surface smooth.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Cheilocephalidae
Formal Genus Name and Reference:
Ordosia LU, 1954
Type Species:
O. fimbricanda
Images
(Click to enlarge in a new window)
Fig. 233, 1. *O. fimbricauda, Inner Mongolia (Tsingshuiho dist.), a, b, cran., pyg., x5 (426).
Synonyms
Geographic Distribution
Up.M.Cam.(Kushanian), NE.Asia
Age Range
Beginning Stage in Treatise Usage:
Up.M.Cam.(Kushanian)
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Up.M.Cam.(Kushanian)
Ending International Stage:
Paibian
Fraction Up In Ending Stage:
0
Ending Date:
494.95
Description
Glabella moderately convex, truncate-tapering, with 2 or 3 pairs of short lateral furrows, narrow, restricted, concave preglabellar field, short occipital spine, faint eye ridges, eyes of medium size, opposite center of glabella, fixigenae with palpebral areas 0.75 of glabellar width, posterior areas narrow, long (tr.). Pygidium broadly semielliptical, axis about same in width as pleural fields, axis convex, tapered nearly full length, 7 or 8 axial rings, may have minute median axial nodes, 6 or 7 pleurae with distinct interpleural grooves and faint pleural furrows, border furrow narrow, distinct, border medium in width, concave. Surface smooth.