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Nicholsonograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Sinograptidae
Formal Genus Name and Reference:
Nicholsonograptus Bouček & PŘIBYL, 1952a, p. 14
Type Species:
Didymograpsus fasciculatus NICHOLSON, 1869, p. 241, OD
Images
(Click to enlarge in a new window)
Fig. 177,3. *N. fasciculatus (Nicholson), LO 3315T, holotype of Azygograptus falciformis Eкström, 1937, Röstånga, Scania, Sweden, scale bar, 1 mm (new)
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Nicholsonograptus fasciculatus Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Nicholsonograptus fasciculatus Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
0
Ending Date:
458.18
Description
sinograptid with a single, strongly S-shaped stipe, thecae with prothecal folds and distally increasing thecal overlap, thecae with distinct geniculum and introverted apertures, thecal apertures elaborated as in Holmograptus, typically with long ventral spines, sicular aperture with ventral rutellum and even longer dorsal, typically curved rutellum
References
Bouček, Bedřich, & Alois Přibyl. 1952a. Taxonomie a kmenovy vyoj nekterych ordovickych graptolitu. Rozpravy ceske Akademie Ved. Umeni, Prague 2 (61)20:1-18 (for 1951). Also published separately in English: Taxonomy and phylogeny of some Ordovician graptolites. Bulletin International de l'Academie Tchèque des Sciences (for 1951) (Rozpravy II. Trudy Česke akademie) 52(20):1-17.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Sinograptidae
Formal Genus Name and Reference:
Nicholsonograptus Bouček & PŘIBYL, 1952a, p. 14
Type Species:
Didymograpsus fasciculatus NICHOLSON, 1869, p. 241, OD
Images
(Click to enlarge in a new window)
Fig. 177,3. *N. fasciculatus (Nicholson), LO 3315T, holotype of Azygograptus falciformis Eкström, 1937, Röstånga, Scania, Sweden, scale bar, 1 mm (new)
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Nicholsonograptus fasciculatus Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Nicholsonograptus fasciculatus Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
0
Ending Date:
458.18
Description
sinograptid with a single, strongly S-shaped stipe, thecae with prothecal folds and distally increasing thecal overlap, thecae with distinct geniculum and introverted apertures, thecal apertures elaborated as in Holmograptus, typically with long ventral spines, sicular aperture with ventral rutellum and even longer dorsal, typically curved rutellum
References
Bouček, Bedřich, & Alois Přibyl. 1952a. Taxonomie a kmenovy vyoj nekterych ordovickych graptolitu. Rozpravy ceske Akademie Ved. Umeni, Prague 2 (61)20:1-18 (for 1951). Also published separately in English: Taxonomy and phylogeny of some Ordovician graptolites. Bulletin International de l'Academie Tchèque des Sciences (for 1951) (Rozpravy II. Trudy Česke akademie) 52(20):1-17.