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  Species: Acestridium dichromum
  Caption: Close-up of ventral view of head
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  Species: Aposturisoma myriodon
  Caption: Close-up of ventral view of head
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  Species: Metaloricaria paucidens
  Caption: Close-up of ventral view of head
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  Species: Synodontis polli
  Caption: Close-up of ventral view of head
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  Species: Astroblepus cacharas
  Caption: Holotype, ventral view of head
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  Species: Auchenipterichthys punctatus
  Caption: Ventral view of head
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  Species: Dentectus barbarmatus
  Caption: Ventral view of head
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  Species: Hemiancistrus cf. punctulatus
  Caption: Ventral view of head
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  Species: Hypancistrus inspector
  Caption: Ventral view of head
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  Species: Hypancistrus sp. (L173)
  Caption: Ventral view of head
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  Species: Hypancistrus sp. (L236)
  Caption: Ventral view of head
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  Species: Hypancistrus sp. (L260)
  Caption: Ventral view of head
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  Species: Hypancistrus sp. (L500)
  Caption: Ventral view of head
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  Species: Panaqolus claustellifer
  Caption: Ventral view of head
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  Species: Panaqolus nocturnus
  Caption: Ventral view of head
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  Species: Peckoltia sp. (L140)
  Caption: Ventral view of head
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  Species: Spatuloricaria sp. `RIO SAN ALEJANDRO`
  Caption: Ventral view of head
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  Species: Spectracanthicus murinus
  Caption: Ventral view of head
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  Species: Synodontis velifer
  Caption: Ventral view of head
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  Species: Brachyplatystoma capapretum
  Caption: Ventral view of head
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  Species: Iheringichthys syi
  Caption: Ventral view of head