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	Platygoniatites
          
            Classification
            
                  Phylum:  
              
                Mollusca              
            
            
                  Class:  
              
                Cephalopoda              
            
            
                  Order:  
              
                Goniatitida              
            
            
                  Superfamily:  
              
                Goniatitoidea              
            
            
                  Family:  
              
                Delepinoceratidae              
            
            
                  Formal Genus Name and Reference:  
              
                Platygoniatites RUZHENTSEV, 1956a, p. 158              
            
            
                  Type Species:  
              
                P. molaris, OD              
              
            
            Images
                        (Click to enlarge in a new window)
            
            
                
                  Fig. 34, 2a-f. *P. molaris, Dombar Hills, South Urals, Kazakhstan, lower Serpukhovian, a-b, PIN 455/210, X 1, c-d, PIN 455/212, X 1, e, holotype, suture, PIN 455/209, whorl height at 31.5 , whorl width 25 mm, X 1 (Ruzhentsev & Bogoslovskaia, 1971), f, cross section, Dombar Hills, PIN 455/214, X 2 (Ruzhentsev, 1956a)., Fig. 35, 2a. *P. karpinskii, Chumaza River, South Urals, Bashkortostan, lower Bashkirian, Russia, whorl height at 8 mm , whorl width 10.5 mm , PIN 455/28786, X 4.3 (Ruzhentsev & Bogoslovskaia, 1978).                
            
            
            Synonyms
            
              
                Altayceras              
            
            
            Geographic Distribution
            
              
                Spain, Portugal, Russia (Novaia Zemlia), Russia and Kazakhstan (South Urals), China (Guangxi, Ningxia, Xinjiang), Tajikistan (Darvaz), USA (Nevada)              
              
            
            Age Range
            
                  Beginning Stage in Treatise Usage:  
              
                Mississippian (uppermost Visean)              
            
            
                  Beginning International Stage:  
              
                Visean              
            
            
                  Fraction Up In Beginning Stage:  
              
                83              
            
            
                  Beginning Date:  
              
                333.13              
            
            
                  Ending Stage in Treatise Usage:  
              
                Mississippian (Serpukhovian)              
            
            
                  Ending International Stage:  
              
                Serpukhovian              
            
            
                  Fraction Up In Ending Stage:  
              
                100              
            
            
                  Ending Date:  
              
                323.4              
              
            
            Description
            
              
                Sides of ventral and adventitious lobes with tendency toward processes, but not yet tridentate, Some forms with triangular coiling on immature stages              
              
            
            
            References
            
              
                              
            
            
            Museum or Author Information
            
          
        
Classification
                  Phylum:  
              
            
                Mollusca              
            
                  Class:  
              
            
                Cephalopoda              
            
                  Order:  
              
            
                Goniatitida              
            
                  Superfamily:  
              
            
                Goniatitoidea              
            
                  Family:  
              
            
                Delepinoceratidae              
            
                  Formal Genus Name and Reference:  
              
            
                Platygoniatites RUZHENTSEV, 1956a, p. 158              
            
                  Type Species:  
              
            
            
                P. molaris, OD              
              Images
(Click to enlarge in a new window)
                  Fig. 34, 2a-f. *P. molaris, Dombar Hills, South Urals, Kazakhstan, lower Serpukhovian, a-b, PIN 455/210, X 1, c-d, PIN 455/212, X 1, e, holotype, suture, PIN 455/209, whorl height at 31.5 , whorl width 25 mm, X 1 (Ruzhentsev & Bogoslovskaia, 1971), f, cross section, Dombar Hills, PIN 455/214, X 2 (Ruzhentsev, 1956a)., Fig. 35, 2a. *P. karpinskii, Chumaza River, South Urals, Bashkortostan, lower Bashkirian, Russia, whorl height at 8 mm , whorl width 10.5 mm , PIN 455/28786, X 4.3 (Ruzhentsev & Bogoslovskaia, 1978).                
            Synonyms
                Altayceras              
            Geographic Distribution
                Spain, Portugal, Russia (Novaia Zemlia), Russia and Kazakhstan (South Urals), China (Guangxi, Ningxia, Xinjiang), Tajikistan (Darvaz), USA (Nevada)              
              Age Range
                  Beginning Stage in Treatise Usage:  
              
            
                Mississippian (uppermost Visean)              
            
                  Beginning International Stage:  
              
            
                Visean              
            
                  Fraction Up In Beginning Stage:  
              
            
                83              
            
                  Beginning Date:  
              
            
                333.13              
            
                  Ending Stage in Treatise Usage:  
              
            
                Mississippian (Serpukhovian)              
            
                  Ending International Stage:  
              
            
                Serpukhovian              
            
                  Fraction Up In Ending Stage:  
              
            
                100              
            
                  Ending Date:  
              
            
            
                323.4              
              Description
                Sides of ventral and adventitious lobes with tendency toward processes, but not yet tridentate, Some forms with triangular coiling on immature stages              
              
