Le, Thanh Hoa, Nguyen, Khue Thi, Pham, Linh Thi Khanh, Doan, Huong Thi Thanh, Roan, Do Thi, Le, Xuyen Thi Kim, Agatsuma, Takeshi, and Blair, David (2023) Mitogenomic and nuclear ribosomal transcription unit datasets support the synonymy of Paragonimus iloktsuenensis and P. ohirai (Paragonimidae: Platyhelminthes). Parasitology Research, 122. pp. 1531-1544.

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Abstract

The complete mitogenome (mtDNA) of nominal Paragonimus iloktsuenensis (Paragonimidae: Trematoda) and the nuclear ribosomal transcription unit (rTU) coding region (rTU*: from 5’-terminus of 18S to 3’-terminus of 28S rRNA gene, excluding the external spacer region) of this species and of P. ohirai were obtained and used to further support the previously suggested synonymy of these taxa in the P. ohirai complex. The complete mitogenome of P. iloktsuenensis was 14,827 bp long (GenBank: ON961029) and nearly identical to that of P. ohirai (14,818 bp; KX765277), with a 99.12% nucleotide identity. The rTU* was 7543 bp and 6932 bp in these two taxa, respectively. All genes and spacers in the rTU were identical in length, with exception of the first internal transcribed spacer, which contained multiple tandem repeat units (6.7 for P. iloktsuenensis and 5.7 for P. ohirai). There was near 100% identity for the rTU genes. The phylogenetic topology inferred from the mtDNA and from individual gene regions (partial cox1 of 387 bp and the ITS-2 of 282 bp − 285 bp) indicated a very close relationship consistent with synonymy of P. iloktsuenensis and P. ohirai. The datasets provided here will be useful for taxonomic reappraisal as well as studies of evolutionary and population genetics of the genus Paragonimus and family Paragonimidae.

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