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Dikelocephalites
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Dikelocephalacea
Family:
Pterocephaliidae
Formal Genus Name and Reference:
Dikelocephalites SUN, 1935
Type Species:
D. flabelliformis
Images
(Click to enlarge in a new window)
Fig. 193, 1. *D. flabelliformis, NE.Asia, cran., X1 (289).
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
U. Cam.(Daizanian) [= or middle Upper Cambrian of Eastern Asia]
Beginning International Stage:
Jiangshanian
Fraction Up In Beginning Stage:
0
Beginning Date:
494.2
Ending Stage in Treatise Usage:
U. Cam.(Daizanian)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
100
Ending Date:
491
Description
Glabella tapering, frontal area 0.3 of length (sag.) of cranidium, flat to slightly concave, anterior border furrow obsolete, eye ridges faint, eyes of medium size, opposite center of glabella, fixigenae horizontal, narrow, with palpebral areas little over 0.3 of glabellar width, posterior areas straplike, long (tr.), librigenae broadly triangular, with short genal spine. Pygidium semicircular, axis convex, narrower than pleural fields, tapered about 0.5 of its length, with 3 or 4 axial rings and terminal, pleurae 3 or 4 , interpleural grooves faint to obsolete, with short, faint pleural furrows and broad flat border. Surface ?granulose (289).
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Dikelocephalacea
Family:
Pterocephaliidae
Formal Genus Name and Reference:
Dikelocephalites SUN, 1935
Type Species:
D. flabelliformis
Images
(Click to enlarge in a new window)
Fig. 193, 1. *D. flabelliformis, NE.Asia, cran., X1 (289).
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
U. Cam.(Daizanian) [= or middle Upper Cambrian of Eastern Asia]
Beginning International Stage:
Jiangshanian
Fraction Up In Beginning Stage:
0
Beginning Date:
494.2
Ending Stage in Treatise Usage:
U. Cam.(Daizanian)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
100
Ending Date:
491
Description
Glabella tapering, frontal area 0.3 of length (sag.) of cranidium, flat to slightly concave, anterior border furrow obsolete, eye ridges faint, eyes of medium size, opposite center of glabella, fixigenae horizontal, narrow, with palpebral areas little over 0.3 of glabellar width, posterior areas straplike, long (tr.), librigenae broadly triangular, with short genal spine. Pygidium semicircular, axis convex, narrower than pleural fields, tapered about 0.5 of its length, with 3 or 4 axial rings and terminal, pleurae 3 or 4 , interpleural grooves faint to obsolete, with short, faint pleural furrows and broad flat border. Surface ?granulose (289).