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Aojia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Pagodiidea
Formal Genus Name and Reference:
Aojia Resser & Endo, in Endo & RESSER, 1937
Type Species:
A. spinosa
Images
(Click to enlarge in a new window)
Fig. 231, 3. *A. spinosa, Manch., 3a, cran., x6, 3 b, c, pyg., x6 (37).
Synonyms
Aojia
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
M.Cam.(Taitzuian)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
73.3
Beginning Date:
494.95
Ending Stage in Treatise Usage:
M.Cam.(Taitzuian)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
87.5
Ending Date:
491.4
Description
Glabella parallel-sided, front broadly rounded, with 2 pairs of short faint lateral furrows, occipital spine, palpebral furrows, and faint eye ridges present, eyes above medium size, fixigenae horizontal, with palpebral areas about 0.3 of glabellar width, posterior areas small, triangular. Pygidium transverse, with axis twice width of pleural fields, 3 or 4 axial rings and pleurae, border furrow very faint, narrow border may have anterior pair of small spines.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:
Pagodiidea
Formal Genus Name and Reference:
Aojia Resser & Endo, in Endo & RESSER, 1937
Type Species:
A. spinosa
Images
(Click to enlarge in a new window)
Fig. 231, 3. *A. spinosa, Manch., 3a, cran., x6, 3 b, c, pyg., x6 (37).
Synonyms
Aojia
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
M.Cam.(Taitzuian)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
73.3
Beginning Date:
494.95
Ending Stage in Treatise Usage:
M.Cam.(Taitzuian)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
87.5
Ending Date:
491.4
Description
Glabella parallel-sided, front broadly rounded, with 2 pairs of short faint lateral furrows, occipital spine, palpebral furrows, and faint eye ridges present, eyes above medium size, fixigenae horizontal, with palpebral areas about 0.3 of glabellar width, posterior areas small, triangular. Pygidium transverse, with axis twice width of pleural fields, 3 or 4 axial rings and pleurae, border furrow very faint, narrow border may have anterior pair of small spines.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).