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Hypostomus yaku

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Species of fish

Hypostomus yaku
Conservation status

Critically Endangered  (IUCN 3.1)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Loricariidae
Genus: Hypostomus
Species: H. yaku
Binomial name
Hypostomus yaku
Martins, Langeani & Zawadzki, 2014

Hypostomus yaku is a species of South American armoured catfish from the family Loricariidae. It is only known from the Rio Quente, a small thermal stream in the Rio Paranaíba drainage of the upper Paraná basin, Brazil. H. yaku is unusual when compared to other species of Hypostomus in that it tolerates warm water up to 34 °C (93 °F) and only attains a relatively small size, growing to 70.8 mm (2.79 in) SL.

Taxonomy

H. yaku can be distinguished from the other members of Hypostomus, some 180 plus species, by the presence, in mature adults, of hypertrophied odontodes arranged randomly along its flanks and caudal peduncle. This characteristic is also found in species of other Hypostominae genera, Aphanotorulus, Peckoltia and Squaliforma, but can be distinguished by several keys (see Martins et al. 2014). H. yaku is most similar to two other species found in the same region, H. nigromaculatus and H. paulinus, but can differentiated by a lack of dark spots (versus presence in H. nigromaculatus) and by smaller adult size (70.8mm SL versus 135 mm (5.3 in) SL in H. paulinus).

References

  1. Lyons, T.J. (2021). "Hypostomus yaku". IUCN Red List of Threatened Species. 2021: e.T173832004A173832008. doi:10.2305/IUCN.UK.2021-3.RLTS.T173832004A173832008.en. Retrieved 24 February 2024.
  2. ^ Martins, F.O.; Langeani, F. & Zawadzki, C.H. (2014). "A new spiny species of Hypostomus Lacépède (Loricariidae: Hypostominae) from thermal waters, upper rio Paraná basin, central Brazil". Neotropical Ichthyology. 12 (4): 729–736. doi:10.1590/1982-0224-20140035. hdl:11449/117915.
  3. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Hypostomus". Catalog of Fishes. California Academy of Sciences. Retrieved 3 January 2015.
  4. Ito, K.F.; Renesto, E. & Zawadzki, C.H. (2009). "Biochemical comparison of two Hypostomus populations (Siluriformes, Loricariidae) from the Atlântico Stream of the upper Paraná River basin, Brazil". Genetics and Molecular Biology. 32 (1): 51–57. doi:10.1590/s1415-47572009000100008. PMC 3032963. PMID 21637646.
Taxon identifiers
Hypostomus yaku
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