General information |
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| Corydoras ehrhardti (Steindachner, 1910) | ||
| Synonyms |
- |
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| IUCN Red List status (2014) | Least Concern (LC) |
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| Habitat | Freshwater |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Callichthyidae. |
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| Geographical distribution | Brazil |
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| Occurrence | Native: Brazil |
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| Importance | ||
| Remarks | FISH with 18S & 5S rDNA probes showed a syntenic location on terminal and proximal positions of long arm of metacentric pair 3. Telomeric probe (TTAGGG)n showed uniform signals on telomeres of all chromosomes. |
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Karyological information |
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| Geographical area of study | Upper Tibagi river basin (Lagoa Dourada, Ponta Grossa, State of Parana, Brazil) | |
| Source of chromosomes | ||
| Number of specimens with sex | 9 males; 10 females |
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| Diploid chromosome number | 44 |
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| Karyotype formula | 18M+ 26SM |
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| Fundamental arm number | 88 |
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| Chromosome length | Not reported |
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| Sex chromosome | Not reported |
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| Chromosome staining/banding/FISH | The constitutive heterochromatin was distributed in large heterochromatic blocks in the pericentromeric region in homologous chromosomes. The silver-stained nucleolar organizer regions (Ag-NORs) were evident in a single metacentric pair in a terminal position of the long arm and confirmed by in situ hybridization with 18S rDNA probes. |
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| Reference(s) |
Artoni RF, Terêncio ML, Vicari MR, Matiello MCA, Cestari MM and Bertollo LAC (2006). Cytogenetics of two sympatric Corydoras species (pisces, siluriformes, challichtyidae) of Southern Brazil. Brazilian Journal of Biology 66(1b): 29-41. |
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