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Normalograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Normalograptidae
Formal Genus Name and Reference:
Normalograptus LEGRAND, 1987, p. 62
Type Species:
* Climacograptus scalaris normalis LAPWORTH, 1877, p. 138, OD
Images
(Click to enlarge in a new window)
Fig. 252, 1 a-b. * N. normalis (LaPworth), holotype, BU 1136, Parakidograptus acuminatus Biozone, Dob's Linn, Southern Uplands, Scotland, UK, scale bars, 1 mm (Blackett \& Zalasiewicz, 2008, Atlas, Folio 2.61)
Synonyms
Geographic Distribution
world-wide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (upper Darriwilian, Pterograptus elegans Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
463.8
Ending Stage in Treatise Usage:
Silurian (Llandovery (Telychian, Spirograptus turriculatus Biozone))
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
0
Ending Date:
432.93
Description
Normalograptids with pattern H astogeny, unornamented geniculate thecae with straight or concave interthecal septa throughout tubarium, complete median septum, slightly undulate to straight, may be delayed, genicular hoods common
References
Legrand, Philippe. 1987. Modo de desarrollo del suborden Diplograptina (Graptolithina) en el Ordovicico superior y en el Silurico. Implicaciones taxonomicas. Revista Espanola de Paleontologia 2:59-64.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Normalograptidae
Formal Genus Name and Reference:
Normalograptus LEGRAND, 1987, p. 62
Type Species:
* Climacograptus scalaris normalis LAPWORTH, 1877, p. 138, OD
Images
(Click to enlarge in a new window)
Fig. 252, 1 a-b. * N. normalis (LaPworth), holotype, BU 1136, Parakidograptus acuminatus Biozone, Dob's Linn, Southern Uplands, Scotland, UK, scale bars, 1 mm (Blackett \& Zalasiewicz, 2008, Atlas, Folio 2.61)
Synonyms
Geographic Distribution
world-wide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (upper Darriwilian, Pterograptus elegans Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
463.8
Ending Stage in Treatise Usage:
Silurian (Llandovery (Telychian, Spirograptus turriculatus Biozone))
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
0
Ending Date:
432.93
Description
Normalograptids with pattern H astogeny, unornamented geniculate thecae with straight or concave interthecal septa throughout tubarium, complete median septum, slightly undulate to straight, may be delayed, genicular hoods common
References
Legrand, Philippe. 1987. Modo de desarrollo del suborden Diplograptina (Graptolithina) en el Ordovicico superior y en el Silurico. Implicaciones taxonomicas. Revista Espanola de Paleontologia 2:59-64.