Lophiosilurus alexandri ';
General information
 
Lophiosilurus alexandri Steindachner, 1876
 
 
Common namePacamão
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
Remarks
Nil
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(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.