Hypostomus yaku
| Hypostomus yaku | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Genus: | Hypostomus |
| Species: | H. yaku
|
| Binomial name | |
| Hypostomus yaku | |
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.[2] 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.[2]
Taxonomy
[edit]H. yaku can be distinguished from the other members of Hypostomus, some 180 plus species,[3] by the presence, in mature adults, of hypertrophied odontodes arranged randomly along its flanks and caudal peduncle.[2] 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).[2] 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)[4] and by smaller adult size (70.8mm SL versus 135 mm (5.3 in) SL in H. paulinus).[2]
References
[edit]- ^ 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.
- ^ a b c d e 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.
- ^ 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.
- ^ 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.
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