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Coosia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Coosellidea
Formal Genus Name and Reference:
Coosia WALCOTT, 1911
Type Species:
C. superba
Images
(Click to enlarge in a new window)
IG. 230,2. *C. superba, Ala.; 2a,b, exoskel., dorsal, profile, XO.7 (488).
Synonyms
Geographic Distribution
North America
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(Dresbach.)
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian(Dresbach.)
Ending International Stage:
Paibian
Fraction Up In Ending Stage:
0
Ending Date:
494.95
Description
Glabella low, elongate, tapering to rounded front, lateral furrows obsolete on exterior, all other furrows faint, frontal area about 0.3 length of cranidium, border wider than preglabellar field, broad shallow anterior border furrow, eye ridges obsolete, fixigenae horizontal or slightly upsloping, with palpebral areas 0.3 of glabellar width, posterior areas 0.5 length (tr.) of occipital ring, librigenae not fully described in the provided text.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Marjumiacea
Family:
Coosellidea
Formal Genus Name and Reference:
Coosia WALCOTT, 1911
Type Species:
C. superba
Images
(Click to enlarge in a new window)
IG. 230,2. *C. superba, Ala.; 2a,b, exoskel., dorsal, profile, XO.7 (488).
Synonyms
Geographic Distribution
North America
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian(Dresbach.)
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian(Dresbach.)
Ending International Stage:
Paibian
Fraction Up In Ending Stage:
0
Ending Date:
494.95
Description
Glabella low, elongate, tapering to rounded front, lateral furrows obsolete on exterior, all other furrows faint, frontal area about 0.3 length of cranidium, border wider than preglabellar field, broad shallow anterior border furrow, eye ridges obsolete, fixigenae horizontal or slightly upsloping, with palpebral areas 0.3 of glabellar width, posterior areas 0.5 length (tr.) of occipital ring, librigenae not fully described in the provided text.