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Lichengia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychaspidacea
Family:
Saukiidae
Formal Genus Name and Reference:
Lichengia KOBAYASHI, 1942
Type Species:
L. onigawara
Images
(Click to enlarge in a new window)
Fig. 239, 5. '"L. onigawal"a, China (Shansi); 5a,b, cran., pyg., X 1.5 (a,419; b,478).
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(Francon.)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
73.3
Beginning Date:
494.95
Ending Stage in Treatise Usage:
Upper Cambrian(Francon.)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
87.5
Ending Date:
491.4
Description
Glabella moderately convex, quadrate, base broadly expanded and front slightly rounded, with 3 pairs of lateral furrows, posterior pair deep, complete, 2nd short, diagonal, anterior pair very faint: eye ridges faint, preglabellar field very narrow, anterior border furrow deep at sides, obsolete at center, anterior border of medium width, downsloping; fixigenae with posterior areas unknown. Pygidium transverse elliptical, sides curving abruptly backward, posterior margin nearly straight with slight median inward bend; axis convex, wider than pleural fields, tapering 0.6 of its length, with narrow post-axial ridge extending nearly to margin, 3 axial rings and terminal with 1 or 2 faint rings; pleural fields low, merging into medium-width concave border, 3 pairs of intcrplcural grooves and parallel shallow pleural furrows. Surface granulose.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychaspidacea
Family:
Saukiidae
Formal Genus Name and Reference:
Lichengia KOBAYASHI, 1942
Type Species:
L. onigawara
Images
(Click to enlarge in a new window)
Fig. 239, 5. '"L. onigawal"a, China (Shansi); 5a,b, cran., pyg., X 1.5 (a,419; b,478).
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(Francon.)
Beginning International Stage:
Paibian
Fraction Up In Beginning Stage:
73.3
Beginning Date:
494.95
Ending Stage in Treatise Usage:
Upper Cambrian(Francon.)
Ending International Stage:
Jiangshanian
Fraction Up In Ending Stage:
87.5
Ending Date:
491.4
Description
Glabella moderately convex, quadrate, base broadly expanded and front slightly rounded, with 3 pairs of lateral furrows, posterior pair deep, complete, 2nd short, diagonal, anterior pair very faint: eye ridges faint, preglabellar field very narrow, anterior border furrow deep at sides, obsolete at center, anterior border of medium width, downsloping; fixigenae with posterior areas unknown. Pygidium transverse elliptical, sides curving abruptly backward, posterior margin nearly straight with slight median inward bend; axis convex, wider than pleural fields, tapering 0.6 of its length, with narrow post-axial ridge extending nearly to margin, 3 axial rings and terminal with 1 or 2 faint rings; pleural fields low, merging into medium-width concave border, 3 pairs of intcrplcural grooves and parallel shallow pleural furrows. Surface granulose.