| General information |
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Lophiosilurus alexandri Steindachner, 1876 |
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| Common name | Pacamão |
| Synonyms |
Xiphorhamphus lacustris Lutken, 1875 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Pseudopimelodidae. |
| Geographical distribution |
Brazil |
| Occurrence |
endemic: Brazil |
| Importance |
Food |
| Karyological information |
| Geographical area of study |
Tres Marias region; Sao Francisco River basin, Brazil |
| Source of chromosomes |
Not reported |
| Number of specimens with sex |
56 (03 males; 04 females; 49 undetermined) |
| Diploid chromosome number |
54 |
| Karyotype formula |
16m+18sm+10st+10a |
| Fundamental arm number |
98 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
Ag-NORs were located terminally on the long arms of a subtelocentric chromosome pair. Constitutive heterochromatin was detected on the centromeric and telomeric regions of most of the chromosomes; CMA3 sites and 18S rDNA sites were coincident to those obtained by silver staining; 5S rRNA genes were detected on the short arms of a acrocentric chromosome pair. |
| Reference |
Marques MBDA, Moreira-Filho O, Garcia C, Margarido VP (2008). Cytogenetic analyses of two endemic fish species from the Sao Francisco River basin: Conorhynchus conirostris and Lophiosilurus alexandri (Siluriformes). Genetics and Molecular Biology, 31(1): 215-221. |
| Cross Link |