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Acanthograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Dendroidea
Superfamily:
Unknown
Family:
Callograptidae
Formal Genus Name and Reference:
Acanthograptus SPENCER, 1878, p. 461
Type Species:
*Acanthograpsus granti, M
Images
(Click to enlarge in a new window)
Fig. 151, 1a. *A. granti, Hamilton, Ontario, Canada, type specimen whereabouts unknown, scale bar, 10 mm (Ruedemann, 1908, pl. 6,4), ——Fig. 151, 16. A. arborescens (Bouček, 1957), specimen showing branching pattern, scale bar, 10 mm (Bull, 1987, fig. 10b), -Fig. 151, 1c. A. musciformis (Wiman, 1901), reconstruction of distal part of stipe showing thecal growth, scale bar, 1 mm (Bulman, 1970, fig. 21,1b)
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Cambrian (Miaolingian, Drumian, Goniagnostus nathorsti Biozone)
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
Silurian (Ludlow, Gorstian, Saetograptus chimaera Biozone)
Ending International Stage:
Gorstian
Fraction Up In Ending Stage:
0
Ending Date:
425.01
Description
Erect, possibly bushy or fan-shaped callograptid with complex development of stipes, apertural parts of slender isolated autothecal tubes, inclined to main stipes
References
Spencer, J. W. 1878. Graptolites of the Niagara Formation. Canadian Naturalist and Geologist 8:457-463.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Dendroidea
Superfamily:
Unknown
Family:
Callograptidae
Formal Genus Name and Reference:
Acanthograptus SPENCER, 1878, p. 461
Type Species:
*Acanthograpsus granti, M
Images
(Click to enlarge in a new window)
Fig. 151, 1a. *A. granti, Hamilton, Ontario, Canada, type specimen whereabouts unknown, scale bar, 10 mm (Ruedemann, 1908, pl. 6,4), ——Fig. 151, 16. A. arborescens (Bouček, 1957), specimen showing branching pattern, scale bar, 10 mm (Bull, 1987, fig. 10b), -Fig. 151, 1c. A. musciformis (Wiman, 1901), reconstruction of distal part of stipe showing thecal growth, scale bar, 1 mm (Bulman, 1970, fig. 21,1b)
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Cambrian (Miaolingian, Drumian, Goniagnostus nathorsti Biozone)
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
Silurian (Ludlow, Gorstian, Saetograptus chimaera Biozone)
Ending International Stage:
Gorstian
Fraction Up In Ending Stage:
0
Ending Date:
425.01
Description
Erect, possibly bushy or fan-shaped callograptid with complex development of stipes, apertural parts of slender isolated autothecal tubes, inclined to main stipes
References
Spencer, J. W. 1878. Graptolites of the Niagara Formation. Canadian Naturalist and Geologist 8:457-463.