Insights into the evolution of freshwater sponges (Porifera: Demospongiae: Spongillina): Barcoding and phylogenetic data from Lake Tanganyika endemics indicate multiple invasions and unsettle existing taxonomy

► First molecular results on sponges from Lake Tanganyika show unique COI and ITS2 haplotypes. ► Two clades contain widely distributed genera and endemic lineage. ► Monophyly of Lake Tanganyika sponges rejected. ► Higher taxonomic structure for freshwater sponges called into question.