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Olentella
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Ptychopariina
Superfamily:
Dikelocephalacea
Family:
Pterocephaliidae
Formal Genus Name and Reference:
Olentella IVSHIN, 1956
Type Species:
O. olentensis
Images
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Synonyms
Geographic Distribution
SW.Sib.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
100
Ending Date:
486.85
Description
Glabella low, elongate-tapering, lateral furrows obsolete, eye ridges faint, frontal area 0.3 of glabellar length (sag.), anterior border furrow narrow, distinct, eyes medium in size, nearly opposite center of glabella, fixigenae horizontal, with palpebral areas 0.5 of glabellar width, posterior areas triangular, medium in width (exsag.). Pygidium broad, transverse, with convex axis and pleural fields subequal in width, 3 axial rings and long terminal, 3 or 4 pleurae, pleural furrows broad, border medium width. Surface unknown.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Ptychopariina
Superfamily:
Dikelocephalacea
Family:
Pterocephaliidae
Formal Genus Name and Reference:
Olentella IVSHIN, 1956
Type Species:
O. olentensis
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
SW.Sib.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
100
Ending Date:
486.85
Description
Glabella low, elongate-tapering, lateral furrows obsolete, eye ridges faint, frontal area 0.3 of glabellar length (sag.), anterior border furrow narrow, distinct, eyes medium in size, nearly opposite center of glabella, fixigenae horizontal, with palpebral areas 0.5 of glabellar width, posterior areas triangular, medium in width (exsag.). Pygidium broad, transverse, with convex axis and pleural fields subequal in width, 3 axial rings and long terminal, 3 or 4 pleurae, pleural furrows broad, border medium width. Surface unknown.