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• 
  Species:
  Baryancistrus sp. (L142)
  
  Caption: Close-up of males pectoral fin ray
• 
  Species:
  Duringlanis perugiae
  
  Caption: Close-up of pectoral fin ray
• 
  Species:
  Liosomadoras oncinus
  
  Caption: Close-up of pectoral fin ray
• 
  Species:
  Callichthys callichthys
  
  Caption: Close-up of pectoral fin ray
• 
  Species:
  Erethistes pusillus
  
  Caption: Example of divergent spines on outside edge of pectoral fin ray
• 
  Species:
  Parancistrus sp. (LDA046)
  
  Caption: Pectoral fin ray
• 
  Species:
  Synodontis angelicus
  
  Caption: Pectoral fin ray
• 
  Species:
  Hyalobagrus flavus
  
  Caption: Sketch of pectoral fin ray
• 
  Species:
  Hyalobagrus leiacanthus
  
  Caption: Sketch of pectoral fin ray
• 
  Species:
  Hyalobagrus ornatus
  
  Caption: Sketch of pectoral fin ray