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  Species: Aposturisoma myriodon
  Caption: Close up of dorsal view of head
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  Species: Synodontis granulosus
  Caption: Close-up dorsal view of head
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  Species: Peckoltia braueri
  Caption: Close-up dorsal view of head showing pattern variances
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  Species: Trachelyopterus sp. (2)
  Caption: Close-up of dorsal view of head
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  Species: Chaca bankanensis
  Caption: Close-up of dorsal view of head
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  Species: Chaca chaca
  Caption: Close-up of dorsal view of head
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  Species: Dolichancistrus fuesslii
  Caption: Close-up of dorsal view of head
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  Species: Rineloricaria melini
  Caption: Close-up of dorsal view of head
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  Species: Brachyplatystoma tigrinum
  Caption: Close-up of dorsal view of head
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  Species: Breitensteinia insignis
  Caption: Dorsal view of head
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  Species: Breitensteinia insignis
  Caption: Dorsal view of head
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  Species: Cathorops aguadulce
  Caption: Dorsal view of head
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  Species: Cathorops belizensis
  Caption: Dorsal view of head
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  Species: Cathorops higuchii
  Caption: Dorsal view of head
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  Species: Cathorops kailolae
  Caption: Dorsal view of head
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  Species: Cathorops melanopus
  Caption: Dorsal view of head
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  Species: Osteogeneiosus militaris
  Caption: Dorsal view of head
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  Species: Astroblepus pholeter
  Caption: Dorsal view of head
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  Species: Trachelyopterus ceratophysus
  Caption: Dorsal view of head
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  Species: Hemibagrus olyroides
  Caption: Dorsal view of head
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  Species: Pseudomystus stenogrammus
  Caption: Dorsal view of head
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  Species: Clariallabes melas
  Caption: Dorsal view of head
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  Species: Dolichallabes microphthalmus
  Caption: Dorsal view of head
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  Species: Gymnallabes typus
  Caption: Dorsal view of head
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  Species: Gymnallabes typus
  Caption: Dorsal view of head
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  Species: Chrysichthys delhezi
  Caption: Dorsal view of head
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  Species: Chrysichthys laticeps
  Caption: Dorsal view of head
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  Species: Chrysichthys longibarbis
  Caption: Dorsal view of head
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  Species: Chrysichthys punctatus
  Caption: Dorsal view of head
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  Species: Chrysichthys thonneri
  Caption: Dorsal view of head
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  Species: Parauchenoglanis punctatus
  Caption: Dorsal view of head
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  Species: Hemidoras stenopeltis
  Caption: Dorsal view of head
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  Species: Ancistrus cryptophthalmus
  Caption: Dorsal view of head
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  Species: Ancistrus macrophthalmus
  Caption: Dorsal view of head
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  Species: Hypostomus latifrons
  Caption: Dorsal view of head
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  Species: Hypostomus sp. (L087)
  Caption: Dorsal view of head
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  Species: Loricaria luciae
  Caption: Dorsal view of head
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  Species: Loricariichthys platymetopon
  Caption: Dorsal view of head
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  Species: Panaqolus nocturnus
  Caption: Dorsal view of head
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  Species: Peckoltia lujani
  Caption: Dorsal view of head
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  Species: Rineloricaria sp. (5)
  Caption: Dorsal view of head
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  Species: Scobinancistrus aureatus
  Caption: Dorsal view of head
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  Species: Synodontis aterrimus
  Caption: Dorsal view of head
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  Species: Synodontis velifer
  Caption: Dorsal view of head
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  Species: Platysilurus mucosus
  Caption: Dorsal view of head
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  Species: Platystomatichthys sturio
  Caption: Dorsal view of head
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  Species: Pseudoplatystoma reticulatum
  Caption: Dorsal view of head
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  Species: Silurus glanis
  Caption: Dorsal view of head
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  Species: Bagarius yarrelli
  Caption: Dorsal view of head
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  Species: Microglanis reikoae
  Caption: Dorsal view of head, showing distinctive nostrils
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  Species: Astroblepus cacharas
  Caption: Holotype, dorsal view of head
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  Species: Spectracanthicus punctatissimus
  Caption: L030 dorsal view of head
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  Species: Spectracanthicus punctatissimus
  Caption: L030 dorsal view of head
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  Species: Spectracanthicus punctatissimus
  Caption: L030 dorsal view of head