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In this study, mitochondrial genomes (mitogenomes) of seven cichlid species (   Lamprologus   kungweensis   ,    L.   meleagris   ,    L.   ornatipinnis   ,    Neolamprologus   brevis   ,    N.   caudopunctatus   ,    N.   leleupi   , and    N.   similis   ) are characterized for the first time. The newly sequenced mitogenomes contained 37 typical genes [13 protein-coding genes ( PCGs ), two ribosomal RNA genes ( rRNAs ) and 22 transfer RNA genes ( tRNAs )]. The mitogenomes were 16,562 ~ 16,587 bp in length with an A + T composition of 52.1~58.8%. The cichlid mitogenomes had a comparable nucleotide composition, A + T content was higher than the G + C content. The AT-skews of most mitogenomes were inconspicuously positive and the GC-skews were negative, indicating higher occurrences of C than G. Most  PCGs  started with the conventional start codon, ATN. There was no essential difference in the codon usage patterns of these seven species. Using Ka/Ks, we found the fastest-evolving gene were  atp8 . But the results of p-distance indicated that the fastest-evolving gene was  nad6.  Phylogenetic analysis revealed that    L.   meleagris    did not cluster with    Lamprologus    species, but with species from the genus    Neolamprologus   . The novel information obtained about these mitogenomes will contribute to elucidating the complex relationships among cichlid species.

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﻿Comparison of seven complete mitochondrial genomes from    Lamprologus    and    Neolamprologus    (  Chordata  ,   Teleostei  ,   Perciformes  ) and the phylogenetic implications for   Cichlidae

﻿Comparison of seven complete mitochondrial genomes from Lamprologus and Neolamprologus ( Chordata , Teleostei , Perciformes ) and the phylogenetic implications for Cichlidae

Comparison of seven complete mitochondrial genomes from Lamprologus and Neolamprologus ( Chordata , Teleostei , Perciformes ) and the phylogenetic implications for Cichlidae