Posthovitellinum psiloterminae n. gen., n. sp. (Digenea: Lissorchiidae) Infecting the Intestine of Cyclocheilos enoplos (Cypriniformes: Cyprinidae) in the Mekong River, Vietnam

Truong, Triet N.; Warren, Micah B.; Ksepka, Steven P.; Curran, Stephen S.; Bullard, Stephen A.

doi:10.1645/20-77

Cited by 9 publications

(3 citation statements)

References 46 publications

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“…Phylogenetic data support the unification of the lissorchiine and the asymphylodorine digeneans into the same family but do not support the monophyly of the Lissorchiinae ( [9][10][11]40], Present Study). Notably, the position of two lissorchiine genera, Lissorchis and Palaeorchis Szidat, 1943, is unstable in the phylograms of different authors [10,11], Present Study. Anarhichotrema, in contrast to the other lissorchiid genera, has a marine life history and the filamented eggs compare with [5,9,11].…”

Section: Discussionmentioning

confidence: 57%

“…Notably, the position of two lissorchiine genera, Lissorchis and Palaeorchis Szidat, 1943, is unstable in the phylograms of different authors [10,11], Present Study. Anarhichotrema, in contrast to the other lissorchiid genera, has a marine life history and the filamented eggs compare with [5,9,11]. Taking into account the ecological and morphological features of Anarhichotrema as well as the phylogenetic data (the basal position of Anarhichotrema and the paraphyly of the Lissorchiinae), we conjecture that a separate subfamily may have to be erected for this genus in the future and that all freshwater lissorchiids should probably be considered within one subfamily (Lissorchiinae).…”

Section: Discussionmentioning

confidence: 64%

“…The division is based on the number of testes: two in the former and one in the latter subfamily [5]. Phylogenetic data support the unification of the lissorchiine and the asymphylodorine digeneans into the same family but do not support the monophyly of the Lissorchiinae ( [9][10][11]40], Present Study). Notably, the position of two lissorchiine genera, Lissorchis and Palaeorchis Szidat, 1943, is unstable in the phylograms of different authors [10,11], Present Study.…”

Section: Discussionmentioning

confidence: 78%

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Phylogenetic Evidence for the Lissorchiid Concept of the Genus Anarhichotrema Shimazu, 1973 (Trematoda, Digenea)

2022

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Anarhichotrema Shimazu, 1973 is a monotypic digenean genus, with the type- and only species, Anarhichotrema ochotense Shimazu, 1973, known to infect North Pacific fishes. This genus was originally described as a member of the Lissorchiidae (Monorchioidea) and later moved to the Zoogonidae (Microphalloidea). Its exact phylogenetic position has remained unresolved due to the lack of molecular data. In this study, we isolated specimens of A. ochotense from the Bering wolffish, Anarhichas orientalis Pallas, 1814 caught in the Sea of Okhotsk, described them morphologically and performed a molecular phylogenetic analysis of their nuclear 18S and 28S rDNA regions. The specimens examined in our study generally corresponded to previous morphological descriptions of A. ochotense but were noticeably smaller, possibly due to the crowding effect. The phylogenetic analysis placed Anarhichotrema within the Lissorchiidae as a sister taxon to the group comprising freshwater lissorchiids. Thus, we restore Anarhichotrema to the Lissorchiidae, as originally assigned.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 78%

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Phylogenetic Evidence for the Lissorchiid Concept of the Genus Anarhichotrema Shimazu, 1973 (Trematoda, Digenea)

2022

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Resurrection and emendation of Pseudoparamacroderoides Gupta & Agrawal, 1968 (Digenea: Macroderoididae), description of a new species from Vietnam, and comments on the systematics of macroderoidid genera

et al. 2021

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Two new species of Cephalogonimidae Looss, 1899 (Digenea: Plagiorchioidea) from Africa (Mozambique and Guinea), including a new phylogenetic hypothesis for related plagiorchioids

Curran

Dutton

Warren

et al. 2021

International Journal for Parasitology: Parasites and Wildlife

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Two new species of Cephalogonimidae Looss, 1899 (from Emoleptalea Looss, 1900 and Masenia Chatterji, 1933) are described from African freshwater fishes. Emoleptalea mozambiquensis n. sp. infected the turquoise killifish, Nothobranchius furzeri Jubb, in Mozambique and differs from its nine congeners by the combination of differences in body shape and size, oral sucker shape, sucker width ratio, configuration of the digestive tract and gonads, vitelline follicle shape and vitellarium configuration. Emoleptalea dollfusi Srivastava, 1960 is a synonym of Emoleptalea loossi Srivastava, 1960, thus there are still nine accepted species. Masenia baroensis n. sp. infected the globe fish, Tetraodon lineatus L., in the Republic of Guinea and differs from its five African congeners and 15 Asian congeners by the combination of circumoral spine count, oral sucker shape, caecal extent, ovary shape, genital pore position, and configuration of the vitellarium. Masenia dayali (Gupta & Puri, 1984) Chandra & Saxena, 2016 and Masenia pushpanjalii are nomina dubia . We propose Masenia ritai (Agrawal, 1964) n. comb., with M . ritai Sircar & Sinha, 1970 its junior synonym. Heterorchis cf. crumenifer (identified tentatively due to egg size) is reported from the West African lungfish, Protopterus annectens (Owen), in Mozambique (new geographical record). Heterorchis protopteri Thomas, 1958 and Heterorchis ghanensis Thomas, 1968 are species inquirendae . Sequences (28S rDNA) from these parasites were included in a Bayesian phylogenetic analysis with 37 other ingroup taxa. Both new species formed a clade with Masenia nkomatiensis Dumbo, Dos Santos & Avenant-Oldewage, 2019 from Africa. These three species formed a sister relationship with the other available cephalogonimids: Cephalogonimus americanus Stafford, 1902 and Cephalogonimus retusus (Dujardin, 1845), both frog parasites from North America and Europe, respectively. Heterorchis cf. crumenifer represented a distinct lineage within the Plagiorchioidea but formed a polytomy with species from 10 plagiorchioid families.

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Posthovitellinum psiloterminae n. gen., n. sp. (Digenea: Lissorchiidae) Infecting the Intestine of Cyclocheilos enoplos (Cypriniformes: Cyprinidae) in the Mekong River, Vietnam

Cited by 9 publications

References 46 publications

Phylogenetic Evidence for the Lissorchiid Concept of the Genus Anarhichotrema Shimazu, 1973 (Trematoda, Digenea)

Phylogenetic Evidence for the Lissorchiid Concept of the Genus Anarhichotrema Shimazu, 1973 (Trematoda, Digenea)

Resurrection and emendation of Pseudoparamacroderoides Gupta & Agrawal, 1968 (Digenea: Macroderoididae), description of a new species from Vietnam, and comments on the systematics of macroderoidid genera

Two new species of Cephalogonimidae Looss, 1899 (Digenea: Plagiorchioidea) from Africa (Mozambique and Guinea), including a new phylogenetic hypothesis for related plagiorchioids

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