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Pterograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Dichograptina
Family:
Pterograptidae
Formal Genus Name and Reference:
Pterograptus HOLM, 1881a, p. 74
Type Species:
*P. elegans, M
Images
(Click to enlarge in a new window)
Fig. 200,1a–c. *P. elegans; 1a–1b, holotype, PMO 2697, Oslo Region, Norway, scale bars, 10 mm (Holm, 1881a, fig. 2–3); 1c, GSC 102784, flattened and bleached proximal end showing artus-type development, scale bar, 0.5 mm (Maletz, 1994a, fig. 1). ——Fig. 200,1d. P. lyricus kebLe & harris, 1934, paratype, NMV P13755, showing zigzag pattern of main stipe, Victoria, Australia, scale bar, 1 mm (new). ——Fig. 200,1e. P. scanicus hoLM, 1881a, reconstruction, scale bar, 10 mm (Bulman, 1970, fig. 77)
Synonyms
Geographic Distribution
UK, France, Germany, Portugal, Sweden, Norway, Canada, USA, Argentina, China, Australia, New Zealand.
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (upper Darriwilian, Pterograptus elegans Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
50
Beginning Date:
463.8
Ending Stage in Treatise Usage:
Middle Ordovician (upper Darriwilian, Pterograptus elegans Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Pterograptid with long slender sicula, prosicula expanded, origin of th1¹ on metasicula, th1¹ dicalycal (artus-type development); alternating cladial branches on each theca of the two main stipes; main stipes declined to deflexed.
References
Holm, Gerhard. 1881a. Pterograptus, ett nytt graptolitslägte. Öfversigt af Konglika Vetenskaps-Akademiens Förhandlingar 38(4):71-84.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Dichograptina
Family:
Pterograptidae
Formal Genus Name and Reference:
Pterograptus HOLM, 1881a, p. 74
Type Species:
*P. elegans, M
Images
(Click to enlarge in a new window)
Fig. 200,1a–c. *P. elegans; 1a–1b, holotype, PMO 2697, Oslo Region, Norway, scale bars, 10 mm (Holm, 1881a, fig. 2–3); 1c, GSC 102784, flattened and bleached proximal end showing artus-type development, scale bar, 0.5 mm (Maletz, 1994a, fig. 1). ——Fig. 200,1d. P. lyricus kebLe & harris, 1934, paratype, NMV P13755, showing zigzag pattern of main stipe, Victoria, Australia, scale bar, 1 mm (new). ——Fig. 200,1e. P. scanicus hoLM, 1881a, reconstruction, scale bar, 10 mm (Bulman, 1970, fig. 77)
Synonyms
Geographic Distribution
UK, France, Germany, Portugal, Sweden, Norway, Canada, USA, Argentina, China, Australia, New Zealand.
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (upper Darriwilian, Pterograptus elegans Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
50
Beginning Date:
463.8
Ending Stage in Treatise Usage:
Middle Ordovician (upper Darriwilian, Pterograptus elegans Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Pterograptid with long slender sicula, prosicula expanded, origin of th1¹ on metasicula, th1¹ dicalycal (artus-type development); alternating cladial branches on each theca of the two main stipes; main stipes declined to deflexed.
References
Holm, Gerhard. 1881a. Pterograptus, ett nytt graptolitslägte. Öfversigt af Konglika Vetenskaps-Akademiens Förhandlingar 38(4):71-84.