Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Zootaxa 516-530 systematics taxonomy molecular phylogeny karyotype sex-chromosomes CAMEROUN 2013 fdi:010059890 ENG Zootaxa 1175-5326 ISI:000320320000006 4 10.11646/zootaxa.3670.4.6 https://www.documentation.ird.fr/hor/fdi:010059890 https://www.documentation.ird.fr/intranet/publi/depot/2013-09-05/010059890.pdf 3670 Horizon (IRD) Aphyosemion pamaense sp. nov. is described from the Pama River, a small tributary of the Nyong, in the surroundings of Pama, Cameroon. It belongs to the subgenus Chromaphyosemion Radda, 1971 and is distinguished from its relatives by a unique/diagnostic combination of characters: orange unpaired fins, an anal fin without spots, an orange throat and purple to blue-grey flanks. The new species is also genetically differentiated from all the other Chromaphyosemion species as revealed by mtDNA (cytochrome b) analysis and characterised by a unique karyotype showing tentative sex chromosomes with 2n=35 chromosomes in males versus 2n=36 in females. 034 UR226