A phylogenetic assessment of Pronoprymna spp. (Digenea: Faustulidae) and Pacific and Antarctic representatives of the genus Steringophorus Odhner, 1905 (Digenea: Fellodistomidae), with description of a new species

• Main Authors: S. G. Sokolov (10978563), S. V. Shchenkov (10978566), I. I. Gordeev (10978569)
• Format: Dataset
• Language: unknown
• Published: 2021
• Subjects: Microbiology; Genetics; Molecular Biology; Physiology; Evolutionary Biology; Ecology; Inorganic Chemistry; Plant Biology; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; Digenea; Gymnophalloidea; marine environment; 28S rDNA; nd1 mtDNA; Antarctic; Okhotsk; Pacific; Antarc*
• Online Access: https://doi.org/10.6084/m9.figshare.14790069.v1

In this study, we elucidated the phylogenetic position of a Pacific species Pronoprymna petrowi , a Caspian species Pronoprymna ventricosa , an Antarctic species of the genus Steringophorus, S. liparidis , and a new species of the same genus, S. occidentalipacificus sp. nov. The new species was found in a bathylagid fish Leuroglossus schmidti from the Sea of Okhotsk. Steringophorus occidentalipacificus sp. nov. is similar to S. congeri , and differs from it in the length of the body and the forebody, the shape of the testes, the sucker-ratio, the size of eggs and the extension of the caeca and the cirrus-sac. The 28S rRNA gene-based analyses supported a sister relationship between Pr. petrowi and Pr. ventricosa , and put the genus Pronoprymna into to the group of faustulids ( sensu lato ), which is nested within the Gymnophaloidea clade. Based on the results of these analyses, Steringophorus is identified as a paraphyletic taxon within the Fellodistomidae (Gymnophalloidea). Phylogenic reconstructions also support a morphologically identified sister relationship between S. liparidis and S. thulini and demonstrate a close relationship of S. occidentalipacificus sp. nov. with S. blackeri and S. pritchardae . The analysis of the nd1 gene sequences also confirmed the phylogenetic affinity of S. liparidis to S. thulini . urn:lsid:zoobank.org:pub:6217E5D2-00FD-4135-A8DA-CDBAFACA52