Hemichromini

Ozouf-Costaz, Catherine, Coutanceau, Jean-Pierre, Bonillo, Céline, Mercot, Hervé, Fermon, Yves & Guidi-Rontani, Chantal, 2017, New insights into the chromosomal differentiation patterns among cichlids from Africa and Madagascar, Cybium 41 (1), pp. 35-43 : 39

Tribe Hemichromini

Hemichromini are also members of ancient African cichlid lineages and their precise phylogenetic position remains uncertain ( Genner et al., 2007). Hemichromis fasciatus , has a wide West African distribution. Its karyotype (2n = 46) is characterized by a large metacentric pair, which certainly arise from a centric fusion between two acrocentric chromosomes, and a large acrocentric pair, possibly of similar origin as the large acrocentric pair described in C. guntheri guntheri . It also shows two pairs of small metacentric chromosomes, arising from pericentric inversions in small acrocentrics. The karyotype of another species of Hemichromini , H. bimaculatus (2n = 44), has been published ( Poletto et al., 2010). This species also possesses a typical, large acrocentric pair, and two large metacentric pairs only. The large acrocentric pair is possibly conserved between the two species. However, both species show different patterns of chromosomal rearrangements. They involve only centric fusion for H. bimaculatus and both centric fusions and pericentric inversions for H. fasciatus .