Lamprologini, Poll, 1986

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 : 38

Tribe Lamprologini

We analysed the lamprologine species, endemic to Lake Tanganyika, Altolamprologus compressiceps (Boulenger, 1898) , Julidochromis transcriptus Matthes, 1959 , Neolamprologus tetracanthus (Boulenger, 1899) and Neolamprologus brevis (Boulenger, 1899) . The karyotypes of the lamprologini investigated here display 2n = 42 chromosomes. The karyotypes of A. compressiceps , J. transcriptus , and N. tetracanthus are composed of 10 m /sm and 32 st/t (FN = 52) whereas the karyotype of N. brevis consists of 14 m /sm and 28 st/t (FN = 56) (Tab. I). All karyotypes of these four species show a single, very large pair of m-sm chromosomes and a single, also large pair of acrocentric chromosomes. In addition, we localized the 18S rRNA genes in the terminal region of short arm of a small st/a chromosome pair in these four species ( Fig. 2 ).

Figures

Figure 2. – Karyotypes of Malagasy and African cichlids after conventional fluorescence in situ hybridization coun- terstained with DAPI (blue). m/sm pairs are separated on the first line of each karyotype. The 18S rRNA probed chromosomes are shown (red). Scale bar = 5 µm.