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Pseudazygograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dicranograptidae
Formal Genus Name and Reference:
Pseudazygograptus Mu, Lee, & GEH, 1960, p. 37
Type Species:
*Azygograptus incurvus ЕКSTRÖM, 1937, p. 33, OD
Images
(Click to enlarge in a new window)
Fig. 242,4a-b. * P. incurvus (Екström), 4 a, syntype, LO 3322T, fragment, Scania, Sweden (new), 4b, OSU 32911, proximal end, Athens Shale, Alabama, USA (Finney, 1980, fig. 9B). Scale bars, 1 mm
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Jiangxigraptus vagus Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Upper Ordovician (Sandbian, Nemagraptus gracilis Biozone)
Ending International Stage:
Sandbian
Fraction Up In Ending Stage:
0
Ending Date:
452.75
Description
Single-stiped dicranograptid with variously oriented stipe, from horizontal to strongly reflexed, thecae slender, geniculate and frequently with genicular hoods, apertures with slight lateral lobes or straight
References
Mu, An-Tze, & C. K. Lee. 1960. Graptolites. Science Press. Beijing. 115 p. In Chinese.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dicranograptidae
Formal Genus Name and Reference:
Pseudazygograptus Mu, Lee, & GEH, 1960, p. 37
Type Species:
*Azygograptus incurvus ЕКSTRÖM, 1937, p. 33, OD
Images
(Click to enlarge in a new window)
Fig. 242,4a-b. * P. incurvus (Екström), 4 a, syntype, LO 3322T, fragment, Scania, Sweden (new), 4b, OSU 32911, proximal end, Athens Shale, Alabama, USA (Finney, 1980, fig. 9B). Scale bars, 1 mm
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Jiangxigraptus vagus Biozone)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Upper Ordovician (Sandbian, Nemagraptus gracilis Biozone)
Ending International Stage:
Sandbian
Fraction Up In Ending Stage:
0
Ending Date:
452.75
Description
Single-stiped dicranograptid with variously oriented stipe, from horizontal to strongly reflexed, thecae slender, geniculate and frequently with genicular hoods, apertures with slight lateral lobes or straight
References
Mu, An-Tze, & C. K. Lee. 1960. Graptolites. Science Press. Beijing. 115 p. In Chinese.