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Parakidograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Monograptoidea
Family:
Dimorphograptidae
Formal Genus Name and Reference:
Parakidograptus Li \& GE, 1981, p. 229
Type Species:
Diplograpsus acuminatus NICHOLSON, 1867a, p. 109, OD
Images
(Click to enlarge in a new window)
_ Fig. 287,3a-b. * P. acuminatus (Nicholson), 3a, praematurus (Davies, 1929), holotype, SM A10023, specimen showing obverse view and possible downward initial growth of th1, scale bar, 1 mm (adapted from Zalasiewicz, 2008c, Atlas, Folio 2.71).
Synonyms
Geographic Distribution
China, Australia (Victoria), UK, Czech Republic, Germany, Poland, Denmark, Sweden, Spain, Canada, USA
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Hirnantian, Metabolograptus persculptus Biozone)
Beginning International Stage:
Hirnantian
Fraction Up In Beginning Stage:
0
Beginning Date:
445.21
Ending Stage in Treatise Usage:
Silurian (Llandovery (Rhuddanian, Atavograptus atavus Biozone))
Ending International Stage:
Rhuddanian
Fraction Up In Ending Stage:
100
Ending Date:
440.49
Description
Biserial monograptoid with protracted proximal end and early upward growth of first two thecae, proximal end probably with pattern J astogeny, thecae slender and elongated, tubular, with straight, outward-inclined apertures, median septum complete
References
Li, Jijin, & Meiyu Ge. 1981. Development and systematic position of akidograptids. Acta Palaeontologica Sinica 20(3):225-234.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Monograptoidea
Family:
Dimorphograptidae
Formal Genus Name and Reference:
Parakidograptus Li \& GE, 1981, p. 229
Type Species:
Diplograpsus acuminatus NICHOLSON, 1867a, p. 109, OD
Images
(Click to enlarge in a new window)
_ Fig. 287,3a-b. * P. acuminatus (Nicholson), 3a, praematurus (Davies, 1929), holotype, SM A10023, specimen showing obverse view and possible downward initial growth of th1, scale bar, 1 mm (adapted from Zalasiewicz, 2008c, Atlas, Folio 2.71).
Synonyms
Geographic Distribution
China, Australia (Victoria), UK, Czech Republic, Germany, Poland, Denmark, Sweden, Spain, Canada, USA
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Hirnantian, Metabolograptus persculptus Biozone)
Beginning International Stage:
Hirnantian
Fraction Up In Beginning Stage:
0
Beginning Date:
445.21
Ending Stage in Treatise Usage:
Silurian (Llandovery (Rhuddanian, Atavograptus atavus Biozone))
Ending International Stage:
Rhuddanian
Fraction Up In Ending Stage:
100
Ending Date:
440.49
Description
Biserial monograptoid with protracted proximal end and early upward growth of first two thecae, proximal end probably with pattern J astogeny, thecae slender and elongated, tubular, with straight, outward-inclined apertures, median septum complete
References
Li, Jijin, & Meiyu Ge. 1981. Development and systematic position of akidograptids. Acta Palaeontologica Sinica 20(3):225-234.