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	Corymbograptus
          
            Classification
            
                  Phylum:  
              
                Hemichordata              
            
            
                  Class:  
              
                Pterobranchia              
            
            
                  Order:  
              
                Graptoloidea              
            
            
                  Superfamily:  
              
                Unknown              
            
            
                  Family:  
              
                Phyllograptidae              
            
            
                  Formal Genus Name and Reference:  
              
                Corymbograptus Obut & SOBOLEVSKAYA, 1964, p. 27              
            
            
                  Type Species:  
              
                *Didymograpsus v-fractus SALTER, 1863a, p. 138, OD              
              
            
            Images
                        (Click to enlarge in a new window)
            
            
                
                  Fig. 193,3a-b. * C. v-fractus (Salter), 3a, neotype, BU 1005a, Baltograptus jacksoni Biozone, Buttermere, Skiddaw Slates, Cumbria, UK (Rushton, 2011, fig. 1A), 3b, BU 1005b, proximal end of larger specimen, scale bars, 1 mm (Rushton, 2011, fig. 1D), ——Fig. 193,3c-d. C. v-fractus tullbergi (Monsen, 1937), drawings from latex cast, counterpart of holotype, PMO K0484, reverse view (c) and PMO 59957 obverse view (d), Oslo Region, Norway, scale bars 1 mm (new), ——Fig. 193,3e. C. retroflexus (Perner, 1895), OMR 54919, proximal end in reverse view, Drahouš, Czech Republic, scale bar, 1 mm (new)                
            
            
            Synonyms
            
              
                              
            
            
            Geographic Distribution
            
              
                China, UK, Czech Republic, Norway, Sweden, Canada, USA, Argentina, ?Bolivia              
              
            
            Age Range
            
                  Beginning Stage in Treatise Usage:  
              
                Lower Ordovician (Floian, Cymatograptus protobalticus Biozone)              
            
            
                  Beginning International Stage:  
              
                Floian              
            
            
                  Fraction Up In Beginning Stage:  
              
                0              
            
            
                  Beginning Date:  
              
                477.08              
            
            
                  Ending Stage in Treatise Usage:  
              
                Middle Ordovician (Darriwilian, Corymbograptus retroflexus Biozone)              
            
            
                  Ending International Stage:  
              
                Darriwilian              
            
            
                  Fraction Up In Ending Stage:  
              
                0              
            
            
                  Ending Date:  
              
                458.18              
              
            
            Description
            
              
                Deflexed, two-stiped phyllograptid with distally distinctly widening stipes, proximal development isograptid, dextral, low prosicular origin of th $1^{1}$, crossing canals low on sicula, sicula long and slender as in Tshallograptus with mitre-shaped prosicula              
              
            
            
            References
            
              
                Obut, A. M., & R. F. Sobolevskaya. 1964. Graptolity ordovika Taimyra. Nauka. Moskva. 91 p. In Russian.              
            
            
            Museum or Author Information
            
          
        
Classification
                  Phylum:  
              
            
                Hemichordata              
            
                  Class:  
              
            
                Pterobranchia              
            
                  Order:  
              
            
                Graptoloidea              
            
                  Superfamily:  
              
            
                Unknown              
            
                  Family:  
              
            
                Phyllograptidae              
            
                  Formal Genus Name and Reference:  
              
            
                Corymbograptus Obut & SOBOLEVSKAYA, 1964, p. 27              
            
                  Type Species:  
              
            
            
                *Didymograpsus v-fractus SALTER, 1863a, p. 138, OD              
              Images
(Click to enlarge in a new window)
                  Fig. 193,3a-b. * C. v-fractus (Salter), 3a, neotype, BU 1005a, Baltograptus jacksoni Biozone, Buttermere, Skiddaw Slates, Cumbria, UK (Rushton, 2011, fig. 1A), 3b, BU 1005b, proximal end of larger specimen, scale bars, 1 mm (Rushton, 2011, fig. 1D), ——Fig. 193,3c-d. C. v-fractus tullbergi (Monsen, 1937), drawings from latex cast, counterpart of holotype, PMO K0484, reverse view (c) and PMO 59957 obverse view (d), Oslo Region, Norway, scale bars 1 mm (new), ——Fig. 193,3e. C. retroflexus (Perner, 1895), OMR 54919, proximal end in reverse view, Drahouš, Czech Republic, scale bar, 1 mm (new)                
            Synonyms
Geographic Distribution
                China, UK, Czech Republic, Norway, Sweden, Canada, USA, Argentina, ?Bolivia              
              Age Range
                  Beginning Stage in Treatise Usage:  
              
            
                Lower Ordovician (Floian, Cymatograptus protobalticus Biozone)              
            
                  Beginning International Stage:  
              
            
                Floian              
            
                  Fraction Up In Beginning Stage:  
              
            
                0              
            
                  Beginning Date:  
              
            
                477.08              
            
                  Ending Stage in Treatise Usage:  
              
            
                Middle Ordovician (Darriwilian, Corymbograptus retroflexus Biozone)              
            
                  Ending International Stage:  
              
            
                Darriwilian              
            
                  Fraction Up In Ending Stage:  
              
            
                0              
            
                  Ending Date:  
              
            
            
                458.18              
              Description
                Deflexed, two-stiped phyllograptid with distally distinctly widening stipes, proximal development isograptid, dextral, low prosicular origin of th $1^{1}$, crossing canals low on sicula, sicula long and slender as in Tshallograptus with mitre-shaped prosicula              
              References
                Obut, A. M., & R. F. Sobolevskaya. 1964. Graptolity ordovika Taimyra. Nauka. Moskva. 91 p. In Russian.              
            