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Glossograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Glossograptidae
Formal Genus Name and Reference:
Glossograptus Emmons, 1855, p. 108, HALL, 1865, p. 59
Type Species:
G. ciliatus
Images
(Click to enlarge in a new window)
Fig. 220,2a. *G. ciliatus, NYSM 7202, Normanskill Shale, Glenmont, New York, scale bar, 5 mm (Ruedemann, 1908, pl. 27,1), Fig. 220,2b. G. acanthus Elles \& Wood, 1908, NIGP 116481, specimen showing glossograptid bulge, Chenjiawu, Jiangxi, China, scale bar, 1 mm (Ni \& Cooper, 1994, fig. 1), ——Fig. 220,2c. G. ovatus (TUllberg, 1880a), holotype, LO 408T, scale bar, 1 mm (Tullberg, 1880a, pl. 11,1)
Synonyms
Lonchograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Levisograptus austrodentatus Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Upper Ordovician (Katian, Dicellograptus ornatus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
0
Ending Date:
445.21
Description
Monopleural, scandent glossograptid formed through dextral torsion of stipes around sicula, typically with considerable glossograptid bulge, paired lateral apertural spines on sicula and variably developed on later thecae, thecal rutella extended and commonly modified, origin of th $1^{1}$ through resorption foramen in middle to lower part of prosicula, proximal development type isograptid, dextral
References
Emmons, Ebenezer. 1855. American Geology, Containing a Statement of the Principles of the Science, with Full Illustrations of the Characteristic American Fossils, Also an Atlas and a Geological Map of the United States. Part 2. The Taconic System. J. Munsell. Albany. 251 p., 18 pl.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Glossograptidae
Formal Genus Name and Reference:
Glossograptus Emmons, 1855, p. 108, HALL, 1865, p. 59
Type Species:
G. ciliatus
Images
(Click to enlarge in a new window)
Fig. 220,2a. *G. ciliatus, NYSM 7202, Normanskill Shale, Glenmont, New York, scale bar, 5 mm (Ruedemann, 1908, pl. 27,1), Fig. 220,2b. G. acanthus Elles \& Wood, 1908, NIGP 116481, specimen showing glossograptid bulge, Chenjiawu, Jiangxi, China, scale bar, 1 mm (Ni \& Cooper, 1994, fig. 1), ——Fig. 220,2c. G. ovatus (TUllberg, 1880a), holotype, LO 408T, scale bar, 1 mm (Tullberg, 1880a, pl. 11,1)
Synonyms
Lonchograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Levisograptus austrodentatus Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Upper Ordovician (Katian, Dicellograptus ornatus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
0
Ending Date:
445.21
Description
Monopleural, scandent glossograptid formed through dextral torsion of stipes around sicula, typically with considerable glossograptid bulge, paired lateral apertural spines on sicula and variably developed on later thecae, thecal rutella extended and commonly modified, origin of th $1^{1}$ through resorption foramen in middle to lower part of prosicula, proximal development type isograptid, dextral
References
Emmons, Ebenezer. 1855. American Geology, Containing a Statement of the Principles of the Science, with Full Illustrations of the Characteristic American Fossils, Also an Atlas and a Geological Map of the United States. Part 2. The Taconic System. J. Munsell. Albany. 251 p., 18 pl.