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Tangyagraptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dicranograptidae
Formal Genus Name and Reference:
Tangyagraptus MU, 1963a, p. 359 (p. 377, English text)
Type Species:
*T. typicus, OD
Images
(Click to enlarge in a new window)
Fig. 243,4a–d. *T. typicus, top of Wufeng Shale, Tangya, Yichang, China; 4a, NIGP WM 185, holotype; 4b–d, paratypes showing astogeny; scale bars, 1 mm (Mu, 1963a, fig. 10).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Katian, Paraorthograptus pacificus Biozone)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
0
Beginning Date:
452.75
Ending Stage in Treatise Usage:
Upper Ordovician (Katian, Paraorthograptus pacificus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
0
Ending Date:
445.21
Description
Reclined, two-stiped dicranograptid with unpaired cladia originating on one side of both stipes, proximal development unknown, proximal end with prominent apertural spines on first thecal pair, prominent sicula may be resorbed in mature specimens
References
Mu, An-Tze. 1963a. On the complication of the graptolite rhabdosome. Acta Palaeontologica Sinica 11:346-377. In Chinese with English summary, p. 374-377.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dicranograptidae
Formal Genus Name and Reference:
Tangyagraptus MU, 1963a, p. 359 (p. 377, English text)
Type Species:
*T. typicus, OD
Images
(Click to enlarge in a new window)
Fig. 243,4a–d. *T. typicus, top of Wufeng Shale, Tangya, Yichang, China; 4a, NIGP WM 185, holotype; 4b–d, paratypes showing astogeny; scale bars, 1 mm (Mu, 1963a, fig. 10).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Katian, Paraorthograptus pacificus Biozone)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
0
Beginning Date:
452.75
Ending Stage in Treatise Usage:
Upper Ordovician (Katian, Paraorthograptus pacificus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
0
Ending Date:
445.21
Description
Reclined, two-stiped dicranograptid with unpaired cladia originating on one side of both stipes, proximal development unknown, proximal end with prominent apertural spines on first thecal pair, prominent sicula may be resorbed in mature specimens
References
Mu, An-Tze. 1963a. On the complication of the graptolite rhabdosome. Acta Palaeontologica Sinica 11:346-377. In Chinese with English summary, p. 374-377.