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Charchaqia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Asaphidae
Formal Genus Name and Reference:
Charchaqia TROEDSSON, 1937
Type Species:
*C. norini
Images
(Click to enlarge in a new window)
Fig. 265, 1. *C. norini, la, b, ceph., pyg., x3 (414n)"
Synonyms
Charchaquia
Geographic Distribution
C.Asia(E.T'ienShan)-?China
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Anterior sections of facial sutures running more or less in exsagittal direction to external cephalic margin, their continuation along which or on doublure being unknown (?marginal), cephalon with narrow, deeply concave border, cephalic axis more or less parallel-sided, smooth, prominent, without glabellar tubercle, frontal area moderately broad, eyes small, well in front of transverse mid-line of cranidium, posterior border furrow distinct, genal angles produced into spines. Hypostoma unknown. Thoracic axis narrow, prominent. Pygidium without border, with narrow, prominent, long axis, pleural fields with distinct interpleural and faint pleural furrows. May be an early member of Isotelinae.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Asaphidae
Formal Genus Name and Reference:
Charchaqia TROEDSSON, 1937
Type Species:
*C. norini
Images
(Click to enlarge in a new window)
Fig. 265, 1. *C. norini, la, b, ceph., pyg., x3 (414n)"
Synonyms
Charchaquia
Geographic Distribution
C.Asia(E.T'ienShan)-?China
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Anterior sections of facial sutures running more or less in exsagittal direction to external cephalic margin, their continuation along which or on doublure being unknown (?marginal), cephalon with narrow, deeply concave border, cephalic axis more or less parallel-sided, smooth, prominent, without glabellar tubercle, frontal area moderately broad, eyes small, well in front of transverse mid-line of cranidium, posterior border furrow distinct, genal angles produced into spines. Hypostoma unknown. Thoracic axis narrow, prominent. Pygidium without border, with narrow, prominent, long axis, pleural fields with distinct interpleural and faint pleural furrows. May be an early member of Isotelinae.