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Oncograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Isograptidae
Formal Genus Name and Reference:
Oncograptus T. S. HALL, 1914, p. 109
Type Species:
* O. upsilon, M
Images
(Click to enlarge in a new window)
Fig. 210,1. *O. upsilon, holotype, NMV P31177, Victoria, Australia, scale bar 5 mm (new)
Synonyms
Geographic Distribution
Australia, New Zealand, China, USA, Canada, Argentina, Ireland
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (upper Dapingian, Oncograptus Biozone)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Middle Ordovician (lower Darriwilian, Levisograptus austrodentatus Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
0
Ending Date:
463.8
Description
Initially scandent, biserial isograptid, two distally diverging stipes with increasing thecal length and overlap, thecae simple tubes with distinct rutella, proximal development of derived-isograptid type, dextral, with origin of th $1^{1}$ low in prosicula
References
Hall, T. S. 1914. Victorian graptolites. Part 4. Some new or little known species. Proceedings of the Royal Society of Victoria (new series) 27:104-118.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Isograptidae
Formal Genus Name and Reference:
Oncograptus T. S. HALL, 1914, p. 109
Type Species:
* O. upsilon, M
Images
(Click to enlarge in a new window)
Fig. 210,1. *O. upsilon, holotype, NMV P31177, Victoria, Australia, scale bar 5 mm (new)
Synonyms
Geographic Distribution
Australia, New Zealand, China, USA, Canada, Argentina, Ireland
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (upper Dapingian, Oncograptus Biozone)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Middle Ordovician (lower Darriwilian, Levisograptus austrodentatus Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
0
Ending Date:
463.8
Description
Initially scandent, biserial isograptid, two distally diverging stipes with increasing thecal length and overlap, thecae simple tubes with distinct rutella, proximal development of derived-isograptid type, dextral, with origin of th $1^{1}$ low in prosicula
References
Hall, T. S. 1914. Victorian graptolites. Part 4. Some new or little known species. Proceedings of the Royal Society of Victoria (new series) 27:104-118.