Phylogenetic analysis of coccidia (Apicomplexa: Eimeriorina) in the belica Leucaspius delineatus (Heckel, 1843)

Abstract

This study was aimed to carry out a comparative analysis and reconstruction of the phylogenetic position of coccidia from the intestine of the belica Leucaspius delineatus (Heckel, 1843) from the Irkutsk Reservoir. Determination and comparative analysis of the nucleotide sequences of the cox1 gene fragment, obtained and available in genetic databases, demonstrated paraphilia of the genera Eimeria and Goussia. The sequences in the phylogenetic tree formed a distinct cluster at the base of the tree. Thus, the hypothesis that fish coccidia were ancestors of coccidia of other vertebrates was indirectly confirmed. The need for additional research and revision of coccidia in fishes from the Angara River and Lake Baikal is discussed.