Common name: bagre
Synonyms and Other Names: Rhamdia oaxacae, R. riojae, R. sapo, bagre negro, bagre-guarié, jandiá, jundiá, jundiá-tinga, mandi, mandi-guaru, sapipoca.
available through www.itis.gov
Identification: Silfvergrip (1996) reviewed and revised the genus Rhamdia. He included diagnostic characteristics for the genus and for R. quelen. Additional information is available in Bockmann and Guazzelli (2003). Also included were illustrations and photographs of this species. This catfish, along with illustrations, is included in identification keys of Britski et al. (1984).
Size: 47 cm TL
Native Range: Tropical America. From southern Mexico to central Argentina (Silfvergrip 1996).
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Rhamdia quelen are found here.
Table last updated 12/2/2023
† Populations may not be currently present.
Ecology: Found in creeks, lakes and rivers, preferring a sandy or muddy bottom covered with detritus (i.e., dead leaves and wood). Nocturnal omnivore, foraging for small fishes, crustaceans, zooplankton, and insects (Burgess 1989; Boujard et al 1997; Le Bail et al. 2000).
Means of Introduction: Probable aquarium release.
Status: Failed in Florida: a single individual was the only specimen ever reported.
Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.
References: (click for full references)
Bockmann, F.A., and G.M. Guazzelli. 2003. Heptapteridae (Heptapterids). 406-431 in
R.E. Reis, S.O. Kullander, and C.J. Ferraris, Jr., eds. Checklist of the freshwater fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.
Boujard, T., M. Pascal, F.J. Meunier, and P.-Y. Le Bail. 1997. Poissons de Guyane. Guide écologique de l"Approuague et de la réserve des Nouragues. Institut National de la Recherche Agronomique, Paris, France.
Britski, H.A., Y. Sato, and A.B.S. Rosa. 1984. Manual de identificação de peixes da região de Tres Marias (com chaves de identificação para os peixes da Bacia do São Francisco). Camara dos Deputados and Companhia de Desenvolvimento do Vale do São Francisco (CODEVASF), Brasília, Brasil.
Burgess, W.E. 1989. An atlas of freshwater and marine catfishes: a preliminary survey of the Siluriformes. Tropical Fish Hobbyist Publications, Inc., Neptune City, NJ.
Le Bail, P.-Y., P. Keith, and P. Planquette. 2000. Atlas des poissons d'eau douce de Guyane (tome 2, fascicule II). Publications scientifiques du Muséum national d'Histoire naturelle, Paris, France.
Silfvergrip, A.M.C. 1996. A systematic revision of the Neotropical catfish genus Rhamdia (Teleostei, Pimelodidae). Swedish Museum of Natural History, Stockholm, Sweden.
Leo Nico, Matt Neilson, and Bill Loftus
Revision Date: 6/29/2023
Peer Review Date: 10/5/2012
Leo Nico, Matt Neilson, and Bill Loftus, 2023, Rhamdia quelen (Quoy and Gaimard, 1824): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=839, Revision Date: 6/29/2023, Peer Review Date: 10/5/2012, Access Date: 12/3/2023
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.