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Diceratograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dicranograptidae
Formal Genus Name and Reference:
Diceratograptus MU, 1963a, p. 367 (p. 377, English text)
Type Species:
$* D$. mirus, OD
Images
(Click to enlarge in a new window)
Fig. 242,3. *D. mirus, syntype, top of Wufeng Shale, Tangya, Yichang, China, scale bar, 1 mm (Mu, 1963a, fig. 13b)
Synonyms
Geographic Distribution
China, Canada, USA
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Katian, Diceratograptus mirus subzone of 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, Diceratograptus mirus subzone of Paraorthograptus pacificus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
0
Ending Date:
445.21
Description
Two-stiped dicranograptids with heart-shaped axial cavity and distally separate stipes, supradorsal part of sicula visible between stipes, thecae strongly geniculate, number of spined proximal thecae and proximal development uncertain
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:
Diceratograptus MU, 1963a, p. 367 (p. 377, English text)
Type Species:
$* D$. mirus, OD
Images
(Click to enlarge in a new window)
Fig. 242,3. *D. mirus, syntype, top of Wufeng Shale, Tangya, Yichang, China, scale bar, 1 mm (Mu, 1963a, fig. 13b)
Synonyms
Geographic Distribution
China, Canada, USA
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Katian, Diceratograptus mirus subzone of 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, Diceratograptus mirus subzone of Paraorthograptus pacificus Biozone)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
0
Ending Date:
445.21
Description
Two-stiped dicranograptids with heart-shaped axial cavity and distally separate stipes, supradorsal part of sicula visible between stipes, thecae strongly geniculate, number of spined proximal thecae and proximal development uncertain
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.