Hypoptopoma
genus of fishes
Hypoptopoma is a genus of freshwater ray-finned fishes belonging to the family Loricariidae, the mailed catfishes, and the subfamily Hypoptopomatinae, the cascudinhos. The catfishes in this genus are found in South America.
Taxonomy
Hypoptopoma was first proposed as a monospecific genus in 1868 by the German-born British ichthyologist and herpetologist Albert Günther when he described Hypoptopoma thoracatum. Günther gave H. thoracatum's type locality as Xeberos in the upper Amazon of Peru. This genus is the type genus of the subfamily Hypoptopomatinae, which is classified in family Loricariidae in the Neotropical catfish suborder Loricarioidei.
Species
Hypoptopoma contains the following valid species:
Hypoptopoma baileyi Aquino & Schaefer, 2010
Hypoptopoma bianale Aquino & Schaefer, 2010
Hypoptopoma brevirostratum Aquino & Schaefer, 2010
Hypoptopoma elongatum Aquino & Schaefer, 2010
Hypoptopoma guianense Boeseman, 1974
Hypoptopoma gulare Cope, 1878
Hypoptopoma incognitum Aquino & Schaefer, 2010
Hypoptopoma inexspectatum (Holmberg, 1893)
Hypoptopoma machadoi Aquino & Schaefer, 2010
Hypoptopoma muzuspi Aquino & Schaefer, 2010
Hypoptopoma psilogaster Fowler, 1915
Hypoptopoma steindachneri Boulenger, 1895
Hypoptopoma thoracatum Günther, 1868
Distribution
Hypoptopoma species inhabit the drainage basins to the east of the Andes, except for river systems draining to the Atlantic between the mouth of the Amazon River in Brazil and the Paraná River in Argentina.
References
Further reading
Aquino, A. E.; Schaefer, S. A. (2010). "Systematics of the genus Hypoptopoma Günther, 1868 (Siluriformes, Loricariidae)" (PDF). Bulletin of the American Museum of Natural History. 336: 1–110.
Begin with the source’s own compact description: “Hypoptopoma” is genus of fishes. The dossier treats that line as a proposition to test through Hypoptopoma, genus and fishes, not as a finished interpretation.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated May 21, 2026. The linked authority identifier is Q5023733. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1868, 2010, 1974 and 1878.
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This entry incorporates text from “Hypoptopoma” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.