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Scientific NamePhenacorhamdia tenebrosa    (Schubart, 1964)
Common Name
Type LocalityRio Mogi Guaçu, Brazil.
Synonym(s)Heptapterus tenebrosus, Imparfinis tenebrosus
EtymologyPhenacorhamdia from phenax, imposter or cheat and Rhamdia, a related genus, i.e., a false Rhamdia, presumably referring to similarity to that genus. From the Greek, hepta, meaning seven and pteron meaning fin.
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Size67mm or 2.6" SL. Find near, nearer or same sized spp.
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DistributionSouth America
São Francisco, Upper São Francisco, Paraopeba (click on these areas to find other species found there)
La Plata, Paraná, Paranapanema, Upper Paranapanema (click on these areas to find other species found there)
São Francisco, Middle São Francisco, Carinhanha (click on these areas to find other species found there)
La Plata, Paraná, Upper Paraná, Pardo (Mato Grosso do Sul), Mogi Guaçu (click on these areas to find other species found there)

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IUCN Red List Category
Least Concern
, a distribution map is available on the IUCN species page. Last assessed 2018.
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BreedingUnreported in the aquarium.
Breeding ReportsThere is no breeding report.
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ReferenceBoletim do Museu Nacional do Rio de Janeiro, Zoologia, Nova Série No. 244, pp 9, Figs. 3-4.
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Look up PlanetCatfish.comLook up P. tenebrosa on PlanetCatfish.com
Look up on FishbaseLook up P. tenebrosa on Fishbase
Look up on Encyclopedia of LifeLook up P. tenebrosa on Encyclopedia of Life
Look up on Global Biodiversity Information FacilityLook up P. tenebrosa on Global Biodiversity Information Facility
Phenacorhamdia tenebrosa QR codeLFS label creator
ARN ref:1.30.148.7198
Last UpdateMon Dec 08, 2025 3:13 pm (Species record created: Thu Jan 01, 1970 1:00 am)