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Desmograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Dendroidea
Superfamily:
Unknown
Family:
Callograptidae
Formal Genus Name and Reference:
Desmograptus Hopkinson in Hopkinson & LAPWORTH, 1875, p. 668
Type Species:
*D. (D.) cancellatus, M
Images
(Click to enlarge in a new window)
Fig. 152,1a. *D. cancellatus, holotype, SM A17507, scale bar, 10 mm (Bulman, 1970, fig. 16,2)., ——Fig. 152,1b, D. bulbosus (Spencer, 1878), holotype, Silurian, Niagara Limestone, Hamilton, Ontario, Canada, scale bar, 10 mm (Spencer, 1884, pl. 4,4)., _-Fig. 152,1c-d. D. nathorsti (Poulsen, 1924), holotype, Katian, Bornholm, Denmark. scale bars, 10 \mathrm{~mm}, 1 mm , respectively (Poulsen, 1924, fig. 2a-b).
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Tremadocian)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Devonian
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
0
Ending Date:
359.3
Description
Tubarium may be conical or fan-shaped, simple to compound stipes, regular, dominant anastomosis, dissepiments rare, autothecae tubular, denticulate to isolate aperturally, bithecae much smaller
References
Hopkinson, John, & Charles Lapworth. 1875. Descriptions of the graptolites of the Arenig and Llandeilo rocks of St. David's. Quarterly Journal of the Geological Society of London 31:631-672, pl. 33-37.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Dendroidea
Superfamily:
Unknown
Family:
Callograptidae
Formal Genus Name and Reference:
Desmograptus Hopkinson in Hopkinson & LAPWORTH, 1875, p. 668
Type Species:
*D. (D.) cancellatus, M
Images
(Click to enlarge in a new window)
Fig. 152,1a. *D. cancellatus, holotype, SM A17507, scale bar, 10 mm (Bulman, 1970, fig. 16,2)., ——Fig. 152,1b, D. bulbosus (Spencer, 1878), holotype, Silurian, Niagara Limestone, Hamilton, Ontario, Canada, scale bar, 10 mm (Spencer, 1884, pl. 4,4)., _-Fig. 152,1c-d. D. nathorsti (Poulsen, 1924), holotype, Katian, Bornholm, Denmark. scale bars, 10 \mathrm{~mm}, 1 mm , respectively (Poulsen, 1924, fig. 2a-b).
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Tremadocian)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Devonian
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
0
Ending Date:
359.3
Description
Tubarium may be conical or fan-shaped, simple to compound stipes, regular, dominant anastomosis, dissepiments rare, autothecae tubular, denticulate to isolate aperturally, bithecae much smaller
References
Hopkinson, John, & Charles Lapworth. 1875. Descriptions of the graptolites of the Arenig and Llandeilo rocks of St. David's. Quarterly Journal of the Geological Society of London 31:631-672, pl. 33-37.