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Changia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychaspidacea
Family:
Ptychaspididae
Formal Genus Name and Reference:
Changia SUN, 1924
Type Species:
C. chinensis
Images
(Click to enlarge in a new window)
Fig. 238, 1. *C. chinensis, China(Shantung), 1 a, b, ceph., pyg., x1 (478).
Synonyms
Geographic Distribution
Upper Cambrian(Fengshan.), E. Asia
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(Fengshan.)
Beginning International Stage:
Jiangshanian
Fraction Up In Beginning Stage:
0
Beginning Date:
491.4
Ending Stage in Treatise Usage:
Upper Cambrian(Fengshan.)
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Glabella rectangular, front straight, posterior part low, anterior lobe swollen, with 3 pairs of lateral furrows, frontal area 0.25 of length (sag.) of cranidium, anterior border furrow obsolete, eyes of medium size, opposite center of glabella, fixigenae upsloping, with palpebral areas 0.5 of glabellar width, posterior areas 0.75 of length (tr.) of occipital ring, librigenae with obsolete lateral border furrows and medium-length slender genal spines. Pygidium semicircular, with short postaxial ridge extending to margin, 4 axial rings and terminal with 1 or 2 faint axial rings, 4 or 5 pleurae, with shallow pleural furrows, border furrow obsolete. Surface smooth
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychaspidacea
Family:
Ptychaspididae
Formal Genus Name and Reference:
Changia SUN, 1924
Type Species:
C. chinensis
Images
(Click to enlarge in a new window)
Fig. 238, 1. *C. chinensis, China(Shantung), 1 a, b, ceph., pyg., x1 (478).
Synonyms
Geographic Distribution
Upper Cambrian(Fengshan.), E. Asia
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(Fengshan.)
Beginning International Stage:
Jiangshanian
Fraction Up In Beginning Stage:
0
Beginning Date:
491.4
Ending Stage in Treatise Usage:
Upper Cambrian(Fengshan.)
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Glabella rectangular, front straight, posterior part low, anterior lobe swollen, with 3 pairs of lateral furrows, frontal area 0.25 of length (sag.) of cranidium, anterior border furrow obsolete, eyes of medium size, opposite center of glabella, fixigenae upsloping, with palpebral areas 0.5 of glabellar width, posterior areas 0.75 of length (tr.) of occipital ring, librigenae with obsolete lateral border furrows and medium-length slender genal spines. Pygidium semicircular, with short postaxial ridge extending to margin, 4 axial rings and terminal with 1 or 2 faint axial rings, 4 or 5 pleurae, with shallow pleural furrows, border furrow obsolete. Surface smooth