| General information |
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Pseudotocinclus tietensis (Ihering, 1907) |
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| Common name | Cascudinho |
| Synonyms |
- |
| IUCN Red List status (2014) |
Vulnerable (VU) |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Loricariidae. |
| Geographical distribution |
Brazil |
| Occurrence |
endemic: Brazil |
| Remarks |
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| Karyological information |
| Geographical area of study |
Tiete River at Paranapiacaba, Sao Paulo, Brazil |
| Source of chromosomes |
Kidney and gills |
| Number of specimens with sex |
9 males and 4 females |
| Diploid chromosome number |
54 |
| Karyotype formula |
26m+20sm+6st ( plus 1m/sm in male and 1sm/sm in female) |
| Fundamental arm number |
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| Chromosome length |
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| Sex chromosome |
XX/XY |
| Chromosome staining/banding/FISH |
AgNORs was located interstitially on the long arm of largest metacentric pair. |
| Reference |
Andreata AA, de Almeida-Toledo LF, Oliveira C, de Almeida Toledo Filho S (1992). Chromosome studies in Hypoptopomatinae (Pisces, Siluriformes, Loricariidae): I. XX/XY sex chromosome heteromorphism in Pseudotocinclus tietensis. Cytologia, 57: 369-372.
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| Cross Link |