General information |
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| Hypostomus cochliodon (Kner, 1854) | ||
| Common name | Cascudo | |
| Synonyms |
- |
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| IUCN Red List status (2014) | Not Reported |
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| Habitat | Freshwater |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Loricariidae. |
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| Geographical distribution | Brazil; Argentina |
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| Occurrence | Native: Brazil, Argentina |
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| Importance | ||
| Remarks | - |
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Karyological information |
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| Geographical area of study | Onça stream, a tributary of Taquari River, upper Paraguai River basin, Mato Grosso do Sul, Brazil. | |
| Source of chromosomes | Kidney cells. |
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| Number of specimens with sex | 16 (7 male, 8 female, 1 unidentified) |
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| Diploid chromosome number | 64 |
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| Karyotype formula | 16m+22sm+18st+8a |
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| Fundamental arm number | 120 |
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| Chromosome length | - |
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| Sex chromosome | No karyotypic differences between sexes. |
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| Chromosome staining/banding/FISH | Single AgNOR detected on long arm of acrocentric chromosome pair 29 at telomeric position. C- band heterochromatin blocks evidenced mainly in pericentromeric regions of metacentric and submetacentric chromosomes and on short arm of submetacentric and subtelocentric chromosomes. AgNOR region was C-banding positive. |
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| Reference(s) |
de Paiva S, Porto FE, Codognotto FJ, Fernandes CA, Rossi MMV, Borin-Carvalho LA, de Brito Portela-Castro AL, Zawadzki CH, Renesto E, Martins-Santos IC (2024). Allozyme and cytogenetic analysis in two species of Hypostomus (Siluriformes: Loricariidae) from the Paraguai River basin, Brazil: occurrence of B microchromosome and intrapopulation heterochromatic polymorphism in H. boulengeri. Neotropical Ichthyology, 22(2): e230117. |
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