Welcome to the Graptolite subsite on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Dichograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Dichograptina
Family:
Dichograptidae
Formal Genus Name and Reference:
Dichograptus SALTER, 1863a, p. 136
Type Species:
*Dichograpsus sedgwickii, SD GURLEY, 1896, p. 64
Images
(Click to enlarge in a new window)
Fig. 187,1a. * D. sedgwickii, lectotype (selected by Elles & Wood, 1902, explanation on pl. 10), BGS GSM 7650, Middle Skiddaw Slates, Braithwaite, Cumbria, UK, arrow indicates position of sicula, scale bar, 10 mm (Elles & Wood, 1902, pl. 10,3a), ——Fig. 187,1b. D. octobrachiatus (Hall, 1858), lectotype (selected by Williams & Stevens, 1988, p. 24), GSC 931i, Lévis, Quebec, Canada, scale bar, 10 mm (Hall, 1865, pl. 7,1)
Synonyms
Dichograpsus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Floian, Tshallograptus fruticosus Biozone)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Middle Ordovician (Dapingian, Isograptus maximodivergens Biozone)
Ending International Stage:
Dapingian
Fraction Up In Ending Stage:
100
Ending Date:
469.42
Description
Large multiramous horizontal to subhorizontal tubarium with two to three consecutive bifurcations starting from a tetragraptid proximal end and without distal dichotomies, central disk in some species but not in others, thecae simple with moderate overlap
References
Salter, J. W. 1863a. Note on the Skiddaw Slate fossils. Quarterly Journal of the Geological Society, London 19:135-140.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Dichograptina
Family:
Dichograptidae
Formal Genus Name and Reference:
Dichograptus SALTER, 1863a, p. 136
Type Species:
*Dichograpsus sedgwickii, SD GURLEY, 1896, p. 64
Images
(Click to enlarge in a new window)
Fig. 187,1a. * D. sedgwickii, lectotype (selected by Elles & Wood, 1902, explanation on pl. 10), BGS GSM 7650, Middle Skiddaw Slates, Braithwaite, Cumbria, UK, arrow indicates position of sicula, scale bar, 10 mm (Elles & Wood, 1902, pl. 10,3a), ——Fig. 187,1b. D. octobrachiatus (Hall, 1858), lectotype (selected by Williams & Stevens, 1988, p. 24), GSC 931i, Lévis, Quebec, Canada, scale bar, 10 mm (Hall, 1865, pl. 7,1)
Synonyms
Dichograpsus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Floian, Tshallograptus fruticosus Biozone)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Middle Ordovician (Dapingian, Isograptus maximodivergens Biozone)
Ending International Stage:
Dapingian
Fraction Up In Ending Stage:
100
Ending Date:
469.42
Description
Large multiramous horizontal to subhorizontal tubarium with two to three consecutive bifurcations starting from a tetragraptid proximal end and without distal dichotomies, central disk in some species but not in others, thecae simple with moderate overlap
References
Salter, J. W. 1863a. Note on the Skiddaw Slate fossils. Quarterly Journal of the Geological Society, London 19:135-140.