General information
Astyanax eigenmanniorum (Cope, 1894)  
   
Common nameLambari
Synonyms
Tetragonopterus eigenmanniorum Cope, 1894
IUCN Red List status (2014)
Not Reported
Habitat
Freshwater
Systematics
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae.
Geographical distribution Brazil; Argentina; Uruguay
Occurrence native: Brazil; native: Argentina; native: Uruguay
Importance Food
Karyological information
Record 1
Geographical area of study Saco da Alemoa, Eldorado do Sul/Hydrographic system from Laguna dos Patos, Brazil
Source of chromosomes Air drying technique and lymphocyte culture
Number of specimens with sex 11 ( 02 males; 09 females)
Diploid chromosome number 48
Karyotype formula 10m+16sm+10st+12a
Fundamental arm number 84
Chromosome length Not reported
Sex chromosome Not detected
Chromosome staining/banding/FISH C-banding pericentromeric; Ag-NORs on short arms of 3 chromosome pairs; FISH showed variation of ribosomal sites.
Reference Piscor D,Alves AL, Parise-Maltempi PP (2015).Chromosomal Microstructure Diversity in Three Astyanax (Characiformes, Characidae) Species: Comparative Analysis of the Chromosomal Locations of the 18S and 5S rDNAs.Zebrafish, 12(1):81-90.
Record 2
Geographical area of study Aquariophiles, Brazil
Source of chromosomes Not reported
Number of specimens with sex 03 ( 01 male;02 females)
Diploid chromosome number 50
Karyotype formula 8m+22sm +12st +8a
Fundamental arm number 92
Chromosome length Not reported
Sex chromosome Not reported
Chromosome staining/banding/FISH Ag-NORs in the terminal regions of the short arms of pair 24 and on the long arm of one homolog of pair 6; GC-rich regions were detected in six chromosomes ;18S rDNA sites occurred on the short arms of pairs 1, 14, and 24, and on the long arms of pairs 5 and 6, always in the terminal region ; 5S rDNA sites were located near the centromeres of pairs 2 and 22
Reference Piscor D,Alves AL, Parise-Maltempi PP (2015).Chromosomal Microstructure Diversity in Three Astyanax (Characiformes, Characidae) Species: Comparative Analysis of the Chromosomal Locations of the 18S and 5S rDNAs.Zebrafish, 12(1):81-90.
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