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• 
  Species:
  Ancistrus centrolepis
  
  Caption: Baudo River, Choco, Colombia. Ventral view.
• 
  Species:
  Rhadinoloricaria stewarti
  
  Caption: Holotype, ventral view.
• 
  Species:
  Rhinotocinclus bockmanni
  
  Caption: Holotype, ventral view. Female, 21.9mm SL
• 
  Species:
  Trichomycterus rosablanca
  
  Caption: Holotype, ventral view. Photo by Felipe Villegas
• 
  Species:
  Ancistrus patronus
  
  Caption: Holotype, ventral view. Photo: Nathan Lujan
• 
  Species:
  Heptapterus carnatus
  
  Caption: Holotype. Ventral view. Bar = 1cm
• 
  Species:
  Heptapterus exilis
  
  Caption: Holotype. Ventral view. Bar = 1cm
• 
  Species:
  Astroblepus sabalo
  
  Caption: Intromittent organ of sexually mature male. (A) Lateral view. (B) Ventral view. af, anal fin.
• 
  Species:
  Exostoma sawmteai
  
  Caption: Ventral view.
• 
  Species:
  Acanthicus hystrix
  
  Caption: Ventral view. Rio Tocantins, near town of Estreito, Maranhão state, Brazil