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Nisusia
Classification
Phylum:
Brachiopoda
Class:
Kutorginata
Order:
Kutorginida
Superfamily:
Nisusioidea
Family:
Nisusiidae
Formal Genus Name and Reference:
Nisusia WALCOTT, 1905, p. 247
Type Species:
Orthisina festinata BILLINGS, 1861b, p. 10, OD
Images
(Click to enlarge in a new window)
Synonyms
Geographic Distribution
USA, Canada, Greenland, Russia (Siberia), Kazakhstan, Australia
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian (Botomian)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
75
Beginning Date:
516.13
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
100
Ending Date:
497
Description
Shell ventribiconvex, transverse rectangular or semioval in outline, ornamented by costellae normally bearing numerous Eoconcha, no spines, ventral interarea apsacline, interior of both valves imperfectly known
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Kutorginata
Order:
Kutorginida
Superfamily:
Nisusioidea
Family:
Nisusiidae
Formal Genus Name and Reference:
Nisusia WALCOTT, 1905, p. 247
Type Species:
Orthisina festinata BILLINGS, 1861b, p. 10, OD
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
USA, Canada, Greenland, Russia (Siberia), Kazakhstan, Australia
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian (Botomian)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
75
Beginning Date:
516.13
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
100
Ending Date:
497
Description
Shell ventribiconvex, transverse rectangular or semioval in outline, ornamented by costellae normally bearing numerous Eoconcha, no spines, ventral interarea apsacline, interior of both valves imperfectly known