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• 
  Species:
  Liobagrus marginatus
  
  Caption: Albino - close-up of head
• 
  Species:
  Malapterurus electricus
  
  Caption: Albino - close-up of head
• 
  Species:
  Synodontis soloni
  
  Caption: Albino - close-up of head
• 
  Species:
  Bagrichthys hypselopterus
  
  Caption: Albino, close-up of head
• 
  Species:
  Eutropiichthys vacha
  
  Caption: Close-up of head
• 
  Species:
  Acrochordonichthys ischnosoma
  
  Caption: Close-up of head
• 
  Species:
  Acrochordonichthys strigosus
  
  Caption: Close-up of head
• 
  Species:
  Akysis prashadi
  
  Caption: Close-up of head
• 
  Species:
  Akysis prashadi
  
  Caption: Close-up of head
• 
  Species:
  Akysis recavus
  
  Caption: Close-up of head
• 
  Species:
  Akysis vespa
  
  Caption: Close-up of head
• 
  Species:
  Parakysis anomalopteryx
  
  Caption: Close-up of head
• 
  Species:
  Parakysis grandis
  
  Caption: Close-up of head
• 
  Species:
  Parakysis notialis
  
  Caption: Close-up of head
• 
  Species:
  Parakysis verrucosus
  
  Caption: Close-up of head
• 
  Species:
  Amblyceps cerinum
  
  Caption: Close-up of head
• 
  Species:
  Belonoglanis brieni
  
  Caption: Close-up of head
• 
  Species:
  Trachyglanis ineac
  
  Caption: Close-up of head
• 
  Species:
  Ariopsis felis
  
  Caption: Close-up of head
• 
  Species:
  Bagre marinus
  
  Caption: Close-up of head
• 
  Species:
  Bunocephalus coracoideus
  
  Caption: Close-up of head
• 
  Species:
  Bunocephalus coracoideus
  
  Caption: Close-up of head
• 
  Species:
  Bunocephalus verrucosus
  
  Caption: Close-up of head
• 
  Species:
  Platystacus cotylephorus
  
  Caption: Close-up of head
• 
  Species:
  Platystacus cotylephorus
  
  Caption: Close-up of head
• 
  Species:
  Pterobunocephalus depressus
  
  Caption: Close-up of head
• 
  Species:
  Xyliphius barbatus
  
  Caption: Close-up of head
• 
  Species:
  Xyliphius melanopterus
  
  Caption: Close-up of head
• 
  Species:
  Ageneiosus inermis
  
  Caption: Close-up of head
• 
  Species:
  Ageneiosus inermis
  
  Caption: Close-up of head
• 
  Species:
  Ageneiosus inermis
  
  Caption: Close-up of head
• 
  Species:
  Asterophysus batrachus
  
  Caption: Close-up of head
• 
  Species:
  Auchenipterichthys punctatus
  
  Caption: Close-up of head
• 
  Species:
  Auchenipterichthys punctatus
  
  Caption: Close-up of head
• 
  Species:
  Auchenipterus nuchalis
  
  Caption: Close-up of head
• 
  Species:
  Centromochlus schultzi
  
  Caption: Close-up of head
• 
  Species:
  Duringlanis romani
  
  Caption: Close-up of head
• 
  Species:
  Liosomadoras morrowi
  
  Caption: Close-up of head
• 
  Species:
  Spinipterus acsi
  
  Caption: Close-up of head
• 
  Species:
  Tatia gyrinus
  
  Caption: Close-up of head
• 
  Species:
  Tatia simplex
  
  Caption: Close-up of head
• 
  Species:
  Tetranematichthys wallacei
  
  Caption: Close-up of head
• 
  Species:
  Tetranematichthys wallacei
  
  Caption: Close-up of head
• 
  Species:
  Trachelyopterus fisheri
  
  Caption: Close-up of head
• 
  Species:
  Trachelyopterus galeatus
  
  Caption: Close-up of head
• 
  Species:
  Trachelyopterus sp. (2)
  
  Caption: Close-up of head
• 
  Species:
  Tympanopleura cf. rondoni
  
  Caption: Close-up of head
• 
  Species:
  Auchenoglanis wittei
  
  Caption: Close-up of head
• 
  Species:
  Notoglanidium macrostoma
  
  Caption: Close-up of head
• 
  Species:
  Notoglanidium macrostoma
  
  Caption: Close-up of head
• 
  Species:
  Notoglanidium thomasi
  
  Caption: Close-up of head
• 
  Species:
  Parauchenoglanis punctatus
  
  Caption: Close-up of head
• 
  Species:
  Austroglanis gilli
  
  Caption: Close-up of head
• 
  Species:
  Bagrichthys macracanthus
  
  Caption: Close-up of head
• 
  Species:
  Batasio fasciolatus
  
  Caption: Close-up of head
• 
  Species:
  Batasio fasciolatus
  
  Caption: Close-up of head
• 
  Species:
  Hemibagrus microphthalmus
  
  Caption: Close-up of head
• 
  Species:
  Hemibagrus wyckii
  
  Caption: Close-up of head
• 
  Species:
  Hemibagrus wyckii
  
  Caption: Close-up of head
• 
  Species:
  Hyalobagrus flavus
  
  Caption: Close-up of head
• 
  Species:
  Leiocassis bekantan
  
  Caption: Close-up of head
• 
  Species:
  Mystus aff. gulio
  
  Caption: Close-up of head
• 
  Species:
  Mystus aff. gulio
  
  Caption: Close-up of head
• 
  Species:
  Mystus ankutta
  
  Caption: Close-up of head
• 
  Species:
  Mystus bocourti
  
  Caption: Close-up of head
• 
  Species:
  Mystus carcio
  
  Caption: Close-up of head
• 
  Species:
  Nanobagrus immaculatus
  
  Caption: Close-up of head
• 
  Species:
  Pseudomystus cf. stenomus
  
  Caption: Close-up of head
• 
  Species:
  Pseudomystus funebris
  
  Caption: Close-up of head
• 
  Species:
  Pseudomystus stenogrammus
  
  Caption: Close-up of head
• 
  Species:
  Sperata aor
  
  Caption: Close-up of head
• 
  Species:
  Tachysurus sinensis
  
  Caption: Close-up of head
• 
  Species:
  Brochis (sub-clade 2) pantanalensis
  
  Caption: Close-up of head
• 
  Species:
  Brochis (sub-clade 3) crimmeni
  
  Caption: Close-up of head
• 
  Species:
  Brochis (sub-clade 3) robineae
  
  Caption: Close-up of head
• 
  Species:
  Brochis (sub-clade 3) sp. (C141)
  
  Caption: Close-up of head
• 
  Species:
  Corydoras blochi
  
  Caption: Close-up of head
• 
  Species:
  Corydoras narcissus
  
  Caption: Close-up of head
• 
  Species:
  Corydoras semiaquilus
  
  Caption: Close-up of head
• 
  Species:
  Corydoras vittatus
  
  Caption: Close-up of head
• 
  Species:
  Dianema urostriatum
  
  Caption: Close-up of head
• 
  Species:
  Hoplisoma brevirostre
  
  Caption: Close-up of head
• 
  Species:
  Hoplisoma julii
  
  Caption: Close-up of head
• 
  Species:
  Hoplisoma sipaliwini
  
  Caption: Close-up of head
• 
  Species:
  Hoplisoma sp. (Cw159)
  
  Caption: Close-up of head
• 
  Species:
  Hoplisoma sp. (Cw159)
  
  Caption: Close-up of head
• 
  Species:
  Hoplisoma tukano
  
  Caption: Close-up of head
• 
  Species:
  Megalechis thoracata
  
  Caption: Close-up of head
• 
  Species:
  Osteogaster aenea
  
  Caption: Close-up of head
• 
  Species:
  Osteogaster schultzei
  
  Caption: Close-up of head
• 
  Species:
  Osteogaster sp. (Cw009)
  
  Caption: Close-up of head
• 
  Species:
  Osteogaster zygata
  
  Caption: Close-up of head
• 
  Species:
  Cetopsis coecutiens
  
  Caption: Close-up of head
• 
  Species:
  Cetopsis parma
  
  Caption: Close-up of head
• 
  Species:
  Bathyclarias foveolatus
  
  Caption: Close-up of head
• 
  Species:
  Bathyclarias foveolatus
  
  Caption: Close-up of head
• 
  Species:
  Channallabes apus
  
  Caption: Close-up of head
• 
  Species:
  Channallabes apus
  
  Caption: Close-up of head
• 
  Species:
  Channallabes sp. (1)
  
  Caption: Close-up of head
• 
  Species:
  Channallabes sp. (1)
  
  Caption: Close-up of head
• 
  Species:
  Clarias alluaudi
  
  Caption: Close-up of head
• 
  Species:
  Clarias batrachus
  
  Caption: Close-up of head
• 
  Species:
  Clarias gariepinus
  
  Caption: Close-up of head
• 
  Species:
  Clarias platycephalus
  
  Caption: Close-up of head
• 
  Species:
  Encheloclarias medialis
  
  Caption: Close-up of head
• 
  Species:
  Gymnallabes typus
  
  Caption: Close-up of head
• 
  Species:
  Gymnallabes typus
  
  Caption: Close-up of head
• 
  Species:
  Gymnallabes typus
  
  Caption: Close-up of head
• 
  Species:
  Horaglanis populi
  
  Caption: Close-up of head
• 
  Species:
  Chrysichthys dendrophorus
  
  Caption: Close-up of head
• 
  Species:
  Phyllonemus filinemus
  
  Caption: Close-up of head
• 
  Species:
  Cranoglanis bouderius
  
  Caption: Close-up of head
• 
  Species:
  Diplomystes camposensis
  
  Caption: Close-up of head
• 
  Species:
  Agamyxis pectinifrons
  
  Caption: Close-up of head
• 
  Species:
  Amblydoras nauticus
  
  Caption: Close-up of head
• 
  Species:
  Anadoras grypus
  
  Caption: Close-up of head
• 
  Species:
  Anadoras weddellii
  
  Caption: Close-up of head
• 
  Species:
  Centrodoras brachiatus
  
  Caption: Close-up of head
• 
  Species:
  Centrodoras brachiatus
  
  Caption: Close-up of head
• 
  Species:
  Doras carinatus
  
  Caption: Close-up of head
• 
  Species:
  Hassar wilderi
  
  Caption: Close-up of head
• 
  Species:
  Hemidoras stenopeltis
  
  Caption: Close-up of head
• 
  Species:
  Orinocodoras eigenmanni
  
  Caption: Close-up of head
• 
  Species:
  Oxydoras niger
  
  Caption: Close-up of head
• 
  Species:
  Oxydoras niger
  
  Caption: Close-up of head
• 
  Species:
  Platydoras armatulus
  
  Caption: Close-up of head
• 
  Species:
  Platydoras costatus
  
  Caption: Close-up of head
• 
  Species:
  Pterodoras granulosus
  
  Caption: Close-up of head
• 
  Species:
  Pterodoras granulosus
  
  Caption: Close-up of head
• 
  Species:
  Rhinodoras armbrusteri
  
  Caption: Close-up of head
• 
  Species:
  Rhinodoras boehlkei
  
  Caption: Close-up of head
• 
  Species:
  Rhinodoras sp. `MANACACIAS`
  
  Caption: Close-up of head
• 
  Species:
  Tenellus cristinae
  
  Caption: Close-up of head
• 
  Species:
  Tenellus leporhinus
  
  Caption: Close-up of head
• 
  Species:
  Chasmocranus tapanahoniensis
  
  Caption: Close-up of head
• 
  Species:
  Gladioglanis anacanthus
  
  Caption: Close-up of head
• 
  Species:
  Gladioglanis machadoi
  
  Caption: Close-up of head
• 
  Species:
  Goeldiella eques
  
  Caption: Close-up of head
• 
  Species:
  Pimelodella sp. `COLOMBIA`
  
  Caption: Close-up of head
• 
  Species:
  Pimelodella sp. (2)
  
  Caption: Close-up of head
• 
  Species:
  Pimelodella sp. (3)
  
  Caption: Close-up of head
• 
  Species:
  Rhamdella aymarae
  
  Caption: Close-up of head
• 
  Species:
  Rhamdia quelen
  
  Caption: Close-up of head
• 
  Species:
  Ameiurus natalis
  
  Caption: Close-up of head
• 
  Species:
  Ictalurus furcatus
  
  Caption: Close-up of head
• 
  Species:
  Ictalurus punctatus
  
  Caption: Close-up of head
• 
  Species:
  Noturus flavipinnis
  
  Caption: Close-up of head
• 
  Species:
  Noturus insignis
  
  Caption: Close-up of head
• 
  Species:
  Pylodictis olivaris
  
  Caption: Close-up of head
• 
  Species:
  Acanthicus adonis
  
  Caption: Close-up of head
• 
  Species:
  Acanthicus adonis
  
  Caption: Close-up of head
• 
  Species:
  Acanthicus hystrix
  
  Caption: Close-up of head
• 
  Species:
  Acestridium dichromum
  
  Caption: Close-up of head
• 
  Species:
  Acestridium gymnogaster
  
  Caption: Close-up of head
• 
  Species:
  Ancistomus sp. (L147)
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus aff. ranunculus
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus aguaboensis
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. `LOWER RIO NEGRO`
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. `RIO PARAGUAY`
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. `RIO TOCANTINS`
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. (2)
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. (L100)
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. (L107)
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. (L107)
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus sp. (L327)
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus temminckii
  
  Caption: Close-up of head
• 
  Species:
  Ancistrus triradiatus
  
  Caption: Close-up of head
• 
  Species:
  Aphanotorulus ammophilus
  
  Caption: Close-up of head
• 
  Species:
  Aphanotorulus ammophilus
  
  Caption: Close-up of head
• 
  Species:
  Aphanotorulus emarginatus
  
  Caption: Close-up of head
• 
  Species:
  Baryancistrus demantoides
  
  Caption: Close-up of head
• 
  Species:
  Baryancistrus sp. (L019)
  
  Caption: Close-up of head
• 
  Species:
  Baryancistrus sp. (L142)
  
  Caption: Close-up of head
• 
  Species:
  Chaetostoma dupouii
  
  Caption: Close-up of head
• 
  Species:
  Chaetostoma sp. `COLOMBIA`
  
  Caption: Close-up of head
• 
  Species:
  Chaetostoma sp. (5)
  
  Caption: Close-up of head
• 
  Species:
  Chaetostoma sp. (5)
  
  Caption: Close-up of head
• 
  Species:
  Cordylancistrus tayrona
  
  Caption: Close-up of head
• 
  Species:
  Corumbataia tocantinensis
  
  Caption: Close-up of head
• 
  Species:
  Crossoloricaria cephalaspis
  
  Caption: Close-up of head
• 
  Species:
  Crossoloricaria variegata
  
  Caption: Close-up of head
• 
  Species:
  Dekeyseria picta
  
  Caption: Close-up of head
• 
  Species:
  Dolichancistrus fuesslii
  
  Caption: Close-up of head
• 
  Species:
  Dolichancistrus fuesslii
  
  Caption: Close-up of head
• 
  Species:
  Farlowella amazonum
  
  Caption: Close-up of head
• 
  Species:
  Farlowella hahni
  
  Caption: Close-up of head
• 
  Species:
  Farlowella myriodon
  
  Caption: Close-up of head
• 
  Species:
  Farlowella paraguayensis
  
  Caption: Close-up of head
• 
  Species:
  Farlowella vittata
  
  Caption: Close-up of head
• 
  Species:
  Farlowella vittata
  
  Caption: Close-up of head
• 
  Species:
  Harttia punctata
  
  Caption: Close-up of head
• 
  Species:
  Hemiancistrus sp. (L128)
  
  Caption: Close-up of head
• 
  Species:
  Hemiancistrus sp. (L128)
  
  Caption: Close-up of head
• 
  Species:
  Hemiodontichthys acipenserinus
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus contradens
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus furunculus
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus inspector
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus inspector
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus inspector
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus sp. `LOWER RIO XINGU`
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus sp. (L136)
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus sp. (L174)
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus sp. (L260)
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus sp. (L333)
  
  Caption: Close-up of head
• 
  Species:
  Hypancistrus sp. (L527)
  
  Caption: Close-up of head
• 
  Species:
  Hypoptopoma cf. inexspectatum
  
  Caption: Close-up of head
• 
  Species:
  Hypoptopoma inexspectatum
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus aspidolepis
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus basilisko
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus bolivianus
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus isbrueckeri
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus micromaculatus
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus plecostomus
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus regani
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus regani
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus scaphyceps
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus sertanejo
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus soniae
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus sp. (L231)
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus sp. (L245)
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus sp. (L360)
  
  Caption: Close-up of head
• 
  Species:
  Hypostomus ternetzi
  
  Caption: Close-up of head
• 
  Species:
  Lasiancistrus heteracanthus
  
  Caption: Close-up of head
• 
  Species:
  Lasiancistrus sp. (L033)
  
  Caption: Close-up of head
• 
  Species:
  Leporacanthicus cf. galaxias(l240)
  
  Caption: Close-up of head
• 
  Species:
  Leporacanthicus galaxias
  
  Caption: Close-up of head
• 
  Species:
  Leporacanthicus heterodon
  
  Caption: Close-up of head
• 
  Species:
  Leporacanthicus joselimai
  
  Caption: Close-up of head
• 
  Species:
  Leporacanthicus sp. (L263)
  
  Caption: Close-up of head
• 
  Species:
  Lithoxancistrus orinoco
  
  Caption: Close-up of head
• 
  Species:
  Loricaria luciae
  
  Caption: Close-up of head
• 
  Species:
  Loricaria nimairaco
  
  Caption: Close-up of head
• 
  Species:
  Loricariichthys anus
  
  Caption: Close-up of head
• 
  Species:
  Loricariichthys anus
  
  Caption: Close-up of head
• 
  Species:
  Loricariichthys platymetopon
  
  Caption: Close-up of head
• 
  Species:
  Megalancistrus parananus
  
  Caption: Close-up of head
• 
  Species:
  Metaloricaria paucidens
  
  Caption: Close-up of head
• 
  Species:
  Nannoptopoma sp. (LDA110)
  
  Caption: Close-up of head
• 
  Species:
  Otocinclus cocama
  
  Caption: Close-up of head
• 
  Species:
  Otocinclus flexilis
  
  Caption: Close-up of head
• 
  Species:
  Otocinclus vittatus
  
  Caption: Close-up of head
• 
  Species:
  Otothyropsis piribebuy
  
  Caption: Close-up of head
• 
  Species:
  Oxyropsis wrightiana
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus albivermis
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus albivermis
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus cf. nocturnus
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus maccus
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L002)
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L002)
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L397)
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L448)
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L453)
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L453)
  
  Caption: Close-up of head
• 
  Species:
  Panaqolus sp. (L458)
  
  Caption: Close-up of head
• 
  Species:
  Panaque armbrusteri
  
  Caption: Close-up of head
• 
  Species:
  Paraloricaria commersonoides
  
  Caption: Close-up of head
• 
  Species:
  Paraloricaria vetula
  
  Caption: Close-up of head
• 
  Species:
  Parancistrus sp. (LDA046)
  
  Caption: Close-up of head
• 
  Species:
  Parotocinclus jumbo
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia brevis
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia compta
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia compta
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia sabaji
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia sabaji
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia sp. `RIO NEGRO`
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia sp. (L205)
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia sp. (L209)
  
  Caption: Close-up of head
• 
  Species:
  Peckoltia sp. (L387)
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus cf. leopardus
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus cf. spinosus
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus cf. spinosus
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus leopardus
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus pirarara
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus sp. (L273)
  
  Caption: Close-up of head
• 
  Species:
  Pseudacanthicus sp. (LDA105)
  
  Caption: Close-up of head
• 
  Species:
  Pseudancistrus depressus
  
  Caption: Close-up of head
• 
  Species:
  Pseudancistrus genisetiger
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon aff. apithanos
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon aff. apithanos
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon almendarizi
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon almendarizi
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon almendarizi
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon lamina
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon laticeps
  
  Caption: Close-up of head
• 
  Species:
  Pseudohemiodon unillano
  
  Caption: Close-up of head
• 
  Species:
  Pseudolithoxus anthrax
  
  Caption: Close-up of head
• 
  Species:
  Pseudolithoxus dumus
  
  Caption: Close-up of head
• 
  Species:
  Pseudolithoxus nicoi
  
  Caption: Close-up of head
• 
  Species:
  Pterosturisoma microps
  
  Caption: Close-up of head
• 
  Species:
  Pterosturisoma microps
  
  Caption: Close-up of head
• 
  Species:
  Pterygoplichthys pardalis
  
  Caption: Close-up of head
• 
  Species:
  Pterygoplichthys pardalis
  
  Caption: Close-up of head
• 
  Species:
  Pterygoplichthys parnaibae
  
  Caption: Close-up of head
• 
  Species:
  Pterygoplichthys sp. (L164)
  
  Caption: Close-up of head
• 
  Species:
  Pterygoplichthys weberi
  
  Caption: Close-up of head
• 
  Species:
  Rhinotocinclus chromodontus
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria aff. latirostris
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria cacerensis
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria eigenmanni
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria felipponei
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria lanceolata
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria melini
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria parva
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria sp. (2)
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria sp. (3)
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria sp. (4)
  
  Caption: Close-up of head
• 
  Species:
  Rineloricaria thrissoceps
  
  Caption: Close-up of head
• 
  Species:
  Scobinancistrus cf. pariolispos
  
  Caption: Close-up of head
• 
  Species:
  Scobinancistrus raonii
  
  Caption: Close-up of head
• 
  Species:
  Scobinancistrus raonii
  
  Caption: Close-up of head
• 
  Species:
  Scobinancistrus raonii
  
  Caption: Close-up of head
• 
  Species:
  Spatuloricaria sp. `RIO SAN ALEJANDRO`
  
  Caption: Close-up of head
• 
  Species:
  Spatuloricaria sp. (1)
  
  Caption: Close-up of head
• 
  Species:
  Spatuloricaria sp. (LDA115)
  
  Caption: Close-up of head
• 
  Species:
  Spatuloricaria sp. (LDA115)
  
  Caption: Close-up of head
• 
  Species:
  Spectracanthicus murinus
  
  Caption: Close-up of head
• 
  Species:
  Spectracanthicus punctatissimus
  
  Caption: Close-up of head
• 
  Species:
  Sturisoma barbatum
  
  Caption: Close-up of head
• 
  Species:
  Sturisoma nigrirostrum
  
  Caption: Close-up of head
• 
  Species:
  Sturisoma nigrirostrum
  
  Caption: Close-up of head
• 
  Species:
  Sturisoma nigrirostrum
  
  Caption: Close-up of head
• 
  Species:
  Sturisoma nigrirostrum
  
  Caption: Close-up of head
• 
  Species:
  Sturisomatichthys leightoni
  
  Caption: Close-up of head
• 
  Species:
  Malapterurus electricus
  
  Caption: Close-up of head
• 
  Species:
  Chiloglanis polypogon
  
  Caption: Close-up of head
• 
  Species:
  Chiloglanis pretoriae
  
  Caption: Close-up of head
• 
  Species:
  Euchilichthys guentheri
  
  Caption: Close-up of head
• 
  Species:
  Microsynodontis polli
  
  Caption: Close-up of head
• 
  Species:
  Mochokiella paynei
  
  Caption: Close-up of head
• 
  Species:
  Mochokiella paynei
  
  Caption: Close-up of head
• 
  Species:
  Synodontis acanthomias
  
  Caption: Close-up of head
• 
  Species:
  Synodontis batesii
  
  Caption: Close-up of head
• 
  Species:
  Synodontis caudalis
  
  Caption: Close-up of head
• 
  Species:
  Synodontis clarias
  
  Caption: Close-up of head
• 
  Species:
  Synodontis clarias
  
  Caption: Close-up of head
• 
  Species:
  Synodontis decorus
  
  Caption: Close-up of head
• 
  Species:
  Synodontis eupterus
  
  Caption: Close-up of head
• 
  Species:
  Synodontis irsacae
  
  Caption: Close-up of head
• 
  Species:
  Synodontis katangae
  
  Caption: Close-up of head
• 
  Species:
  Synodontis lucipinnis
  
  Caption: Close-up of head
• 
  Species:
  Synodontis macropunctatus
  
  Caption: Close-up of head
• 
  Species:
  Synodontis ocellifer
  
  Caption: Close-up of head
• 
  Species:
  Synodontis orientalis
  
  Caption: Close-up of head
• 
  Species:
  Synodontis pardalis
  
  Caption: Close-up of head
• 
  Species:
  Synodontis petricola
  
  Caption: Close-up of head
• 
  Species:
  Synodontis robbianus
  
  Caption: Close-up of head
• 
  Species:
  Synodontis rukwaensis
  
  Caption: Close-up of head
• 
  Species:
  Synodontis schoutedeni
  
  Caption: Close-up of head
• 
  Species:
  Synodontis soloni
  
  Caption: Close-up of head
• 
  Species:
  Synodontis sorex
  
  Caption: Close-up of head
• 
  Species:
  Synodontis sp. `LOWER GUINEA`
  
  Caption: Close-up of head
• 
  Species:
  Synodontis sp. hybrid(4)
  
  Caption: Close-up of head
• 
  Species:
  Synodontis tanganyicae
  
  Caption: Close-up of head
• 
  Species:
  Synodontis vanderwaali
  
  Caption: Close-up of head
• 
  Species:
  Synodontis victoriae
  
  Caption: Close-up of head
• 
  Species:
  Synodontis xiphias
  
  Caption: Close-up of head
• 
  Species:
  Pangasianodon gigas
  
  Caption: Close-up of head
• 
  Species:
  Pangasius sanitwongsei
  
  Caption: Close-up of head
• 
  Species:
  Aguarunichthys torosus
  
  Caption: Close-up of head
• 
  Species:
  Brachyplatystoma filamentosum
  
  Caption: Close-up of head
• 
  Species:
  Calophysus macropterus
  
  Caption: Close-up of head
• 
  Species:
  Calophysus macropterus
  
  Caption: Close-up of head
• 
  Species:
  Leiarius marmoratus
  
  Caption: Close-up of head
• 
  Species:
  Leiarius pictus
  
  Caption: Close-up of head
• 
  Species:
  Luciopimelodus pati
  
  Caption: Close-up of head
• 
  Species:
  Parapimelodus sp. `MANAUS`
  
  Caption: Close-up of head
• 
  Species:
  Pimelodus ornatus
  
  Caption: Close-up of head
• 
  Species:
  Platysilurus mucosus
  
  Caption: Close-up of head
• 
  Species:
  Pseudoplatystoma fasciatum
  
  Caption: Close-up of head
• 
  Species:
  Pseudoplatystoma reticulatum
  
  Caption: Close-up of head
• 
  Species:
  Pseudoplatystoma reticulatum
  
  Caption: Close-up of head
• 
  Species:
  Neosilurus ater
  
  Caption: Close-up of head
• 
  Species:
  Neosilurus brevidorsalis
  
  Caption: Close-up of head
• 
  Species:
  Neosilurus brevidorsalis
  
  Caption: Close-up of head
• 
  Species:
  Plotosus papuensis
  
  Caption: Close-up of head
• 
  Species:
  Plotosus papuensis
  
  Caption: Close-up of head
• 
  Species:
  Lophiosilurus alexandri
  
  Caption: Close-up of head
• 
  Species:
  Pseudopimelodus mangurus
  
  Caption: Close-up of head
• 
  Species:
  Rhyacoglanis pulcher
  
  Caption: Close-up of head
• 
  Species:
  Rita kuturnee
  
  Caption: Close-up of head
• 
  Species:
  Pareutropius buffei
  
  Caption: Close-up of head
• 
  Species:
  Belodontichthys dinema
  
  Caption: Close-up of head
• 
  Species:
  Ceratoglanis scleronema
  
  Caption: Close-up of head
• 
  Species:
  Kryptopterus vitreolus
  
  Caption: Close-up of head
• 
  Species:
  Ompok pabo
  
  Caption: Close-up of head
• 
  Species:
  Pterocryptis anomala
  
  Caption: Close-up of head
• 
  Species:
  Pterocryptis anomala
  
  Caption: Close-up of head
• 
  Species:
  Pterocryptis berdmorei
  
  Caption: Close-up of head
• 
  Species:
  Pterocryptis berdmorei
  
  Caption: Close-up of head
• 
  Species:
  Pterocryptis furnessi
  
  Caption: Close-up of head
• 
  Species:
  Silurus biwaensis
  
  Caption: Close-up of head
• 
  Species:
  Silurus triostegus
  
  Caption: Close-up of head
• 
  Species:
  Wallago attu
  
  Caption: Close-up of head
• 
  Species:
  Wallago attu
  
  Caption: Close-up of head
• 
  Species:
  Bagarius lica
  
  Caption: Close-up of head
• 
  Species:
  Bagarius lica
  
  Caption: Close-up of head
• 
  Species:
  Creteuchiloglanis kamengensis
  
  Caption: Close-up of head
• 
  Species:
  Erethistes mesembrinus
  
  Caption: Close-up of head
• 
  Species:
  Gagata cenia
  
  Caption: Close-up of head
• 
  Species:
  Gagata gagata
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax anamalaiensis
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax chavomensis
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax decussatus
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax indicus
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax lanceatus
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax radiolus
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax rugimentum
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax rugimentum
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax telchitta
  
  Caption: Close-up of head
• 
  Species:
  Glyptothorax zanaensis
  
  Caption: Close-up of head
• 
  Species:
  Gogangra viridescens
  
  Caption: Close-up of head
• 
  Species:
  Oreoglanis macroptera
  
  Caption: Close-up of head
• 
  Species:
  Pseudecheneis longipectoralis
  
  Caption: Close-up of head
• 
  Species:
  Pseudecheneis sp. (1)
  
  Caption: Close-up of head
• 
  Species:
  Pseudolaguvia ferula
  
  Caption: Close-up of head
• 
  Species:
  Pseudolaguvia ferula
  
  Caption: Close-up of head
• 
  Species:
  Pseudolaguvia flavida
  
  Caption: Close-up of head
• 
  Species:
  Henonemus triacanthopomus
  
  Caption: Close-up of head
• 
  Species:
  Ituglanis amazonicus
  
  Caption: Close-up of head
• 
  Species:
  Pareiodon microps
  
  Caption: Close-up of head
• 
  Species:
  Pseudostegophilus maculatus
  
  Caption: Close-up of head
• 
  Species:
  Sarcoglanis simplex
  
  Caption: Close-up of head
• 
  Species:
  Trichomycterus alternatus
  
  Caption: Close-up of head
• 
  Species:
  Trichomycterus brasiliensis
  
  Caption: Close-up of head
• 
  Species:
  Trichomycterus brasiliensis
  
  Caption: Close-up of head
• 
  Species:
  Trichomycterus sp. `JIBOIA`
  
  Caption: Close-up of head
• 
  Species:
  Vandellia cirrhosa
  
  Caption: Close-up of head
• 
  Species:
  Farlowella sp. (1)
  
  Caption: Close-up of head - female
• 
  Species:
  Pseudacanthicus sp. (LDA105)
  
  Caption: Close-up of head (adult)
• 
  Species:
  Pterygoplichthys gibbiceps
  
  Caption: Close-up of head (adult)
• 
  Species:
  Neblinichthys pilosus
  
  Caption: Close-up of head (dorsal)
• 
  Species:
  Ancistrus sp. `RIO CHIRGUA`
  
  Caption: Close-up of head (front)
• 
  Species:
  Neblinichthys pilosus
  
  Caption: Close-up of head (lateral)
• 
  Species:
  Spatuloricaria caquetae
  
  Caption: Close-up of head (male)
• 
  Species:
  Brachyplatystoma rousseauxii
  
  Caption: Close-up of head (nose damaged)
• 
  Species:
  Neblinichthys pilosus
  
  Caption: Close-up of head (ventral)
• 
  Species:
  Chauliocheilos saxatilis
  
  Caption: Close-up of head / male lip morphology
• 
  Species:
  Leiarius pictus
  
  Caption: Close-up of head and dorsal fin
• 
  Species:
  Synodontis longirostris
  
  Caption: Close-up of head and humeral process-250 mm SL
• 
  Species:
  Hypancistrus vandragti
  
  Caption: Close-up of head and opercular odontodes
• 
  Species:
  Otothyris lophophanes
  
  Caption: Close-up of head and suckermouth
• 
  Species:
  Hypancistrus sp. (L066)
  
  Caption: Close-up of head of female
• 
  Species:
  Hypancistrus sp. (L070)
  
  Caption: Close-up of head of female
• 
  Species:
  Panaqolus albivermis
  
  Caption: Close-up of head of female
• 
  Species:
  Leporacanthicus cf. galaxias(l241)
  
  Caption: Close-up of head of juvenile
• 
  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:
  Ancistrus sp. (3)
  
  Caption: Close-up of head of piebald male
• 
  Species:
  Parakysis notialis
  
  Caption: Close-up of head on view
• 
  Species:
  Tatia reticulata
  
  Caption: Close-up of head on view
• 
  Species:
  Megalodoras uranoscopus
  
  Caption: Close-up of head showing
• 
  Species:
  Pseudotanganikallabes prognatha
  
  Caption: Close-up of head showing extended lower lip
• 
  Species:
  Dekeyseria scaphirhynchus
  
  Caption: Close-up of head showing grooves
• 
  Species:
  Synodontis multipunctatus
  
  Caption: Close-up of head showing humeral process
• 
  Species:
  Auchenoglanis senegali
  
  Caption: Close-up of head-110 mm SL
• 
  Species:
  Auchenoglanis cf. occidentalis
  
  Caption: Close-up of head-28 cm TL
• 
  Species:
  Sturisomatichthys panamensis
  
  Caption: Close-up of head-Southern Panama
• 
  Species:
  Astroblepus caquetae
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Ancistrus lineolatus
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Chaetostoma platyrhynchus
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Chaetostoma sp. (6)
  
  Caption: Close-up of head, dorsal view
• 
  Species:
  Chaetostoma vagum
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Hypostomus argus
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Hypostomus niceforoi
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Hypostomus oculeus
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Rineloricaria felipponei
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Rineloricaria pareiacantha
  
  Caption: Close-up of head, Dorsal view
• 
  Species:
  Hypancistrus sp. (L066)
  
  Caption: Close-up of head, male
• 
  Species:
  Astroblepus caquetae
  
  Caption: Close-up of head, Ventral view
• 
  Species:
  Hypoptopoma inexspectatum
  
  Caption: Close-up of head, ventral view
• 
  Species:
  Otocinclus mariae
  
  Caption: Close-up of head, ventral view
• 
  Species:
  Oxyropsis wrightiana
  
  Caption: Close-up of head; Dorsal view
• 
  Species:
  Rineloricaria stewarti
  
  Caption: Close-up of head; Dorsal view
• 
  Species:
  Hypostomus cf. paulinus
  
  Caption: Close-up of head. Dorsal view
• 
  Species:
  Pseudacanthicus pirarara
  
  Caption: Female - close-up of head
• 
  Species:
  Scobinancistrus sp. (L253)
  
  Caption: Female - close-up of head
• 
  Species:
  Chaetostoma sacramento
  
  Caption: L455, close-up of head
• 
  Species:
  Chaetostoma sacramento
  
  Caption: L457, close-up of head
• 
  Species:
  Rineloricaria teffeana
  
  Caption: Male - close-up of head
• 
  Species:
  Scobinancistrus sp. (L253)
  
  Caption: Male - close-up of head
• 
  Species:
  Spatuloricaria sp. (LDA115)
  
  Caption: Male, close-up of head
• 
  Species:
  Glanidium ribeiroi
  
  Caption: Preserved specimen - close-up of head
• 
  Species:
  Lasiancistrus caucanus
  
  Caption: Preserved specimen - close-up of head