General information |
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| Lophiosilurus alexandri Steindachner, 1876 | ||
| Common name | Pacamão | |
| Synonyms |
Xiphorhamphus lacustris Lutken, 1875 |
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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; Pseudopimelodidae. |
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| Geographical distribution | Brazil |
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| Occurrence | Endemic: Brazil |
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| Importance | Food |
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| Remarks | Nil |
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Karyological information |
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| Geographical area of study | Tres Marias region; Sao Francisco River basin, Brazil | |
| Source of chromosomes | Not reported |
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| Number of specimens with sex | 56 (03 males; 04 females; 49 undetermined) |
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| Diploid chromosome number | 54 |
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| Karyotype formula | 16m+18sm+10st+10a |
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| Fundamental arm number | 98 |
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| Chromosome length | Not reported |
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| Sex chromosome | Not reported |
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| 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. |
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| Reference(s) |
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. |
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