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Ptychoparella
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychopariacea
Family:
Ptychopariidae
Formal Genus Name and Reference:
Ptychoparella POULSEN, 1927
Type Species:
P. brevicauda
Images
(Click to enlarge in a new window)
Fig. 170, 9. *P. brevicauda, Cape Frederick VII F., 9a, cran., x2, 9 b, pyg., x3.5\\left(172^{*}\\right)
Synonyms
Geographic Distribution
Greenl.
Age Range
Beginning Stage in Treatise Usage:
M.Cam.
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
40
Beginning Date:
512.3
Ending Stage in Treatise Usage:
M.Cam.
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
50
Ending Date:
498.75
Description
Cranidium like that of Ptychoparia but pygidium very short, with well-developed border and very short axis containing only 4 segments
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychopariacea
Family:
Ptychopariidae
Formal Genus Name and Reference:
Ptychoparella POULSEN, 1927
Type Species:
P. brevicauda
Images
(Click to enlarge in a new window)
Fig. 170, 9. *P. brevicauda, Cape Frederick VII F., 9a, cran., x2, 9 b, pyg., x3.5\\left(172^{*}\\right)
Synonyms
Geographic Distribution
Greenl.
Age Range
Beginning Stage in Treatise Usage:
M.Cam.
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
40
Beginning Date:
512.3
Ending Stage in Treatise Usage:
M.Cam.
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
50
Ending Date:
498.75
Description
Cranidium like that of Ptychoparia but pygidium very short, with well-developed border and very short axis containing only 4 segments