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Parabolinella
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Olenacea
Family:
Olenidea
Formal Genus Name and Reference:
Parabolinella Brøgger, 1882
Type Species:
P. limitis, SD BASSLER, 1915
Images
(Click to enlarge in a new window)
Fig. 197, 9. * P. limitis, L.Ord. (Tremadoc.), Norway, ceph., x1 (18).", "Fig. 197, 6. P. triarthra (Callaway), L.Ord.(Tremadoc.), Eng., nearly whole dorsal exoskeleton, lacking librigenae, x1.7 (114)."
Synonyms
Geographic Distribution
Eu.-N.Am.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian?, L.Ord.(Tremadoc)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Upper Cambrian?, L.Ord.(Tremadoc)
Ending International Stage:
Tremadocian
Fraction Up In Ending Stage:
100
Ending Date:
477.08
Description
"regularly ovate exoskeleton", "much wider, semielliptical cephalon", "longer preglabellar field", "wider fixigenae", "prominent eye ridges", "diverging course of anterior sections of facial sutures from eyes to front border", "wide librigenae with straight genal spines", "thorax of 16 to 21 segments with axis narrower than pleural regions and short pleural spines", "smaller pygidium with 1 to 3 axial rings"
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Olenacea
Family:
Olenidea
Formal Genus Name and Reference:
Parabolinella Brøgger, 1882
Type Species:
P. limitis, SD BASSLER, 1915
Images
(Click to enlarge in a new window)
Fig. 197, 9. * P. limitis, L.Ord. (Tremadoc.), Norway, ceph., x1 (18).", "Fig. 197, 6. P. triarthra (Callaway), L.Ord.(Tremadoc.), Eng., nearly whole dorsal exoskeleton, lacking librigenae, x1.7 (114)."
Synonyms
Geographic Distribution
Eu.-N.Am.-S.Am.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian?, L.Ord.(Tremadoc)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Upper Cambrian?, L.Ord.(Tremadoc)
Ending International Stage:
Tremadocian
Fraction Up In Ending Stage:
100
Ending Date:
477.08
Description
"regularly ovate exoskeleton", "much wider, semielliptical cephalon", "longer preglabellar field", "wider fixigenae", "prominent eye ridges", "diverging course of anterior sections of facial sutures from eyes to front border", "wide librigenae with straight genal spines", "thorax of 16 to 21 segments with axis narrower than pleural regions and short pleural spines", "smaller pygidium with 1 to 3 axial rings"