General

• Gratacap (1901: 365), as Pupa armifera
  

AB:     Bibliography for AB

• Dall (1905: 27), as Bifidaria armifera
  
• Pilsbry (1948: 875)
  

MB:     Bibliography for MB

• Dall (1905: 27), as Bifidaria armifera
  
• Hanham (1899: 2), as Bifidaria armifera
  

ON:     Bibliography for ON

• Goodrich (1916: 530), as Bifidaria armifera
  
• Grimm (1996: )
  
• Herrington, Oughton (1940: 43)
  
• Oughton (1948: 50), as Gastrocopta amifera
  
• Robertson, Blakeslee (1948: 35)
  
• Walker (1917: 43), as Bifidaria armifera
  
• Walker (1922: 132)
  

QC:     Bibliography for QC

• Hanham (1897: 101), as Pupa armifera
  
• Hanham (1898: 110), as Pupa armifera
  
• La Rocque (1962: 37)
  
• Pilsbry (1948: 875)
  
• Pilsbry, Vanatta (1900: 607), as Bifidaria armifera