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Eochuangia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Cheilocephalidae
Formal Genus Name and Reference:
Eochuangia KOBAYASHI, 1935, 97
Type Species:
E. hana
Images
(Click to enlarge in a new window)
Fig. 232, 9. *E. hana, China, 9a, cran., 9b, librigena, 9c, d, pyg., all x1.5 (97).
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
M.Cam.(Taitzuian)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
0
Beginning Date:
494.95
Ending Stage in Treatise Usage:
M.Cam.(Taitzuian)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
0
Ending Date:
491.4
Description
Glabella low truncate-tapering, front nearly straight, with 2 pairs of faint lateral furrows, no preglabellar field, narrow palpebral furrows, diagonal eye ridges, eyes above medium size, slightly posterior to center of glabella, fixigenae with palpebral areas 0.5 of glabellar width, posterior areas very narrow, medium in length (tr.). Pygidium subtriangular, axis narrower than pleural fields, with 5 axial rings, 3 broad pleurae crossed by 1 or 2 narrow ridges and broad interpleural grooves (97).It was originally assigned to a Taitzuian regional stage that was considered by Kobayashi (1935, etc.) to be Middle Cambrian in Korea; but later work (give citation) has placed these into the Changshanian regional stage of Upper Cambrian (used here).
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Cheilocephalidae
Formal Genus Name and Reference:
Eochuangia KOBAYASHI, 1935, 97
Type Species:
E. hana
Images
(Click to enlarge in a new window)
Fig. 232, 9. *E. hana, China, 9a, cran., 9b, librigena, 9c, d, pyg., all x1.5 (97).
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
M.Cam.(Taitzuian)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
0
Beginning Date:
494.95
Ending Stage in Treatise Usage:
M.Cam.(Taitzuian)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
0
Ending Date:
491.4
Description
Glabella low truncate-tapering, front nearly straight, with 2 pairs of faint lateral furrows, no preglabellar field, narrow palpebral furrows, diagonal eye ridges, eyes above medium size, slightly posterior to center of glabella, fixigenae with palpebral areas 0.5 of glabellar width, posterior areas very narrow, medium in length (tr.). Pygidium subtriangular, axis narrower than pleural fields, with 5 axial rings, 3 broad pleurae crossed by 1 or 2 narrow ridges and broad interpleural grooves (97).It was originally assigned to a Taitzuian regional stage that was considered by Kobayashi (1935, etc.) to be Middle Cambrian in Korea; but later work (give citation) has placed these into the Changshanian regional stage of Upper Cambrian (used here).