
The phylogenetic relationships of the monogeneric rissooid family Emmericiidae Brusina, 1870 are unclear. The single genus Emmericia Brusina, 1870 occurs along the Adriatic coast from NE Italy to southern Croatia. It is characterised by the peculiar anatomy of the male genitalia (tri-lobed penis, bifurcate flagellum and penial gland). Mitochondrial cytochrome oxidase subunit I (COI) gene sequences, analysed together with nuclear 18S ribosomal RNA gene sequences, showed Bithyniidae and Bythinellidae as the sister taxa of the Emmericiidae, and confirmed the homology of the flagellum and penial gland in the Emmericiidae, Bythinellidae, Amnicolidae and Bithyniidae.
flagellum, 18S rRNA, Bayesian analysis, penial gland, homology, cytochrome oxidase, molecular phylogeny
flagellum, 18S rRNA, Bayesian analysis, penial gland, homology, cytochrome oxidase, molecular phylogeny
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