| General information |
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Corydoras ehrhardti (Steindachner, 1910) |
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| Synonyms |
- |
| IUCN Red List status (2014) |
Least Concern (LC) |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Callichthyidae. |
| Geographical distribution |
Brazil |
| Occurrence |
native: Brazil |
| 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. |
| Karyological information |
| Record 1 |
| Geographical area of study |
Verde River (Tibagi basin-Upper Paraná River, Ponta Grossa, PR, Brazil. |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
24 |
| Diploid chromosome number |
44 |
| Karyotype formula |
18m+26sm |
| Fundamental arm number |
88 |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Large blocks of pericentromeric heterochromatin on metacentric pairs 3, 5, 6, and 8 and submetacentric pairs 10, 14, and 17 observed. |
| Reference |
PatrÃcia Barbosa P, Pucci MB, Nogaroto V, Almeida MC, Artoni RF, Vicari MR (2017). Karyotype analysis of three species of Corydoras (Siluriformes: Callichthyidae) from southern Brazil: rearranged karyotypes and cytotaxonomy. Neotropical Ichthyology, 15(1): e160056. |
| Record 2 |
| 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 |
| Diploid chromosome number |
44 |
| Karyotype formula |
18M+ 26SM |
| Fundamental arm number |
88 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| 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. |
| Reference |
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. |
| Cross Link |