Heterotis niloticus ';
General information
 
Heterotis niloticus (Cuvier, 1829)
 
 
Common nameAfrican bonytongue
Synonyms
-
IUCN Red List status (2014)
Least Concern (LC)
Habitat
Freshwater
Systematics
-
Geographical distribution
Madagascar; Kenya; Nigeria; Cameroon; Ghana; Sudan; Ivory Coast; Senegal; Benin; Burkina Faso; Central African Republic; Chad; Democratic Republic of the Congo; Republic of the Congo; Ethiopia; Gabon; Gambia; Mali; Niger; Togo
Occurrence Introduced: Madagascar, Central African Republic, Democratic Republic of the Congo, Republic of the Congo, Gabon, Togo
Native: Kenya, Nigeria, Cameroon, Ghana, Sudan, Ivory Coast, Senegal, Benin, Burkina Faso, Chad, Ethiopia, Gambia, Mali, Niger
Importance
Remarks
FISH with 5S rDNA probe shows bright signals in pericentromeric region of chromosome pair 6. 18S rDNA probe identified single locus with very intense signal located in distal p arm of pair 15 which corresponds to Ag-NOR site.
Karyological information
Geographical area of study Oluwa River, Africa.
Source of chromosomes
Spleen
Number of specimens with sex
8 (4 male, 4 female)
Diploid chromosome number
40
Karyotype formula
40m/sm
Fundamental arm number
80
Chromosome length
Sex chromosome
No sex-related heteromorphisms detected.
Chromosome staining/banding/FISH
C-positive bands found to reside preferentially in centromeric/pericentromeric regions of all chromosomes. Conspicuous terminal and interstitial C-bands observed in pairs 2, 3, 6, 8, 13, 15, 16, 18, 19, and 20. C-bands on pairs 15 corresponds to Ag-NOR location. Multiple CMA3-positive bands detected in genomes, particularly nearby the telomeric region of five chromosome pairs (9, 11, 12, 15, 18), in addition to Ag-NOR sites.
Reference(s)
de Oliveira EA, Bertollo LAC, Rab P, Ezaz T, Yano CF, Hatanaka T, et al. (2019) Cytogenetics, genomics and biodiversity of the South American and African Arapaimidae fish family (Teleostei, Osteoglossiformes). PLoS ONE 14(3): e0214225.