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• 
  Species:
  Ancistrus sp. (3)
  
  Caption: Close-up of head of male
• 
  Species:
  Hemiancistrus sp. (L128)
  
  Caption: Close-up of head of male
• 
  Species:
  Hypancistrus sp. (L066)
  
  Caption: Close-up of head of male
• 
  Species:
  Hypancistrus sp. (L070)
  
  Caption: Close-up of head of male
• 
  Species:
  Leporacanthicus cf. galaxias`venezuela`
  
  Caption: Close-up of head of male
• 
  Species:
  Leporacanthicus cf. galaxias(l240)
  
  Caption: Close-up of head of male
• 
  Species:
  Leporacanthicus galaxias
  
  Caption: Close-up of head of male
• 
  Species:
  Panaqolus albivermis
  
  Caption: Close-up of head of male
• 
  Species:
  Peckoltia sp. `RIO TOCANTINS`
  
  Caption: Close-up of head of male
• 
  Species:
  Rineloricaria sp. (7)
  
  Caption: Close-up of head of male
• 
  Species:
  Rineloricaria sp. (L010A)
  
  Caption: Close-up of head of male
• 
  Species:
  Synodontis schoutedeni
  
  Caption: Close-up of head of male
• 
  Species:
  Scobinancistrus aureatus
  
  Caption: Head of male
• 
  Species:
  Ancistrus sp. `RIO FORMOSO II`
  
  Caption: Head of male in Rio Formoso
• 
  Species:
  Corumbataia acanthodela
  
  Caption: Hypertrophied odontodes on head of male