Amended diagnosis, validity and relationships of the genus Acrolichanus Ward, 1917 (Digenea: Allocreadiidae) based on the 28S rRNA gene, and observations on its lineage diversity

Atopkin, D. M.; Соколов, С. Г.; Vainutis, Konstantin S.; Voropaeva, E. L.; Shedko, M. B.; Choudhury, Anindo

doi:10.1007/s11230-020-09901-z

Cited by 14 publications

(8 citation statements)

References 35 publications

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“…Among allocreadiids from the Holarctic region, our results using the 28S rDNA gene corroborate the validity of the genus Megalogonia as proposed by Curran et al [ 16 ], and the paraphyletic condition of the Crepidostomum observed by Atopkin and Shedko [ 3 ], Pérez-Ponce de León et al [ 45 ], Petkevičiūtė et al [ 49 ], and Atopkin et al [ 5 ].…”

Section: Discussionsupporting

confidence: 88%

“…New sequences obtained for the present study are in bold. Digeneans Host Host order Locality GenBank ID Reference 28S rDNA COI mtDNA Allocreadiidae Acrolichanus auriculatus Acipenser schrenckii ; Acipenser ruthenus ; Huso dauricus Acipenseriformes Russia MN524579 – MN524580 ; MN524583 ; MN524583 ; FR821397 – FR821398 – [ 3 , 5 ] Allocreadium gotoi Misgurnus anguillicaudatus Cypriniformes Iiyama City, Japan LC215274 – [ 59 ] Allocreadium isoporum Alburnus alburnus Cypriniformes Oster Lake, Karelia GU462125 – GU462126 …”

Section: Methodsmentioning

confidence: 99%

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Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

et al. 2021

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Diversity of Creptotrema was investigated using morphological and molecular tools, including data for Creptotrema creptotrema (type-species). Three new species, parasites of Brazilian fishes, are described: Creptotrema conconae n. sp. (type-host, Imparfinis mirini Haseman), Creptotrema schubarti n. sp. (type-host, Characidium schubarti Travassos) and Creptotrema megacetabularis n. sp. (type-host, Auchenipterus osteomystax (Miranda Ribeiro)). The diagnosis of the genus was amended to include new features. The new species differ from each other mainly in terms of body shape, relative sucker size, and testes position. DNA sequences were obtained from Creptotrema spp. from Brazil, including 28S, ITS and COI. Genetic divergences among the new species and C. creptotrema varied from 2.1 to 5.2% (21–49 bp) for 28S, and 6.6 to 16.4% (21–45 bp) for COI. Phylogenetic analysis (28S) placed the newly generated DNA sequences of Creptotrema in a clade (Creptotrema clade sensu stricto) composed of C. creptotrema, the new species described herein, and all species previously described as Auriculostoma, revealing that Auriculostoma is best interpreted as a synonym of Creptotrema based on the principle of priority of zoological nomenclature. Creptotrema funduli, the single sequence of the genus previously available, was not grouped within the Creptotrema clade sensu stricto, suggesting the need for reevaluation of the taxonomic status of this species. Our results showed that Creptotrema represents a monophyletic genus of trematodes widely distributed across the Americas, which currently comprises 19 valid species of parasites of teleosts and anurans.

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Section: Discussionsupporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

et al. 2021

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“…The fact that the amended diagnosis of the genus now shows that their species may or may not have muscular lobes on the oral sucker implies that the genus needs further comparison with all genera of allocreadiids. Eight genera possess muscular lobes on the oral sucker, including Creptotrema , Creptotrematina Yamaguti, 1954, Bunoderella Schell, 1964, Crepidostomum Braun, 1900, Bunodera Railliet, 1896, Megalogonia Surber, 1928 and the recently resurrected Acrolichanus Ward, 1917 (Atopkin et al , 2020). For these members of the Allocreadiidae, the term ‘papillose allocreadiids’ was coined by Hopkins (1933), and later used by Caira (1989).…”

Section: Resultsmentioning

confidence: 99%

“…Other studies have already demonstrated, through molecular analyses of the 28S rRNA gene, cases of paraphyletic genera within Allocreadiidae, which contrast with the morphological concept on which these genera were erected (see Atopkin & Shedko, 2014; Pérez-Ponce de León et al , 2016; Petkevičiūtė, 2018). Recent molecular phylogenetic analyses of the Allocreadiidae show that the ‘papillose allocreadiids’ ( sensu Hopkins, 1937) do not form a monophyletic assemblage; oral lobes apparently either arose or were secondarily lost several times during the evolutionary history of the group, depending on the plesiomorphic condition (see Hernández-Mena et al ., 2016, 2019; Pérez-Ponce de León et al ., 2016; Atopkin et al ., 2020). Clearly, more DNA sequences are needed to test the hypothesis of the paraphyly of Creptotrema, especially from congeners in South America where the largest species diversity of the genus is found, and where the type species was reported.…”

Section: Discussionmentioning

confidence: 99%

Disentangling the evolutionary and biogeographical history of the freshwater fish trematode genus Creptotrema (Digenea: Allocreadiidae) using an integrative taxonomy approach: the case of Creptotrema agonostomi in Middle American mountain mullets

et al. 2020

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Species of the allocreadiid genus Creptotrema are parasites of freshwater fishes in the Americas. Species in the genus possess one pair of muscular oral lobes on the oral sucker. Currently, the genus contains eight species, six distributed in South America, one in Middle America and one in North America. Genetic data are only available for the North American species, Creptotrema funduli, a parasite of fundulids originally described from Oneida Lake, New York State. In this study, we obtained 28S ribosomal DNA sequences of trematodes morphologically similar to Creptotrema agonostomi from the mountain mullet, Dajaus monticola, across a wide geographical range in Middle America. Our molecular phylogenetic analyses showed that (1) the genus Creptotrema, as currently conceived, is not monophyletic; (2) the allocreadiids in mountain mullets should be re-allocated in the genus Pseudoparacreptotrema; and (3) the allocreadiid trematodes from D. monticola across Middle America represent four morphologically similar species, three of which can be distinguished genetically. These three new species are described herein using an integrative taxonomy approach. We contend that accurate estimates of species diversity and phylogenetic relationships among allocreadiids, and most likely other species of trematodes, necessarily require an integrative taxonomy approach that should consider at least DNA sequences and scanning electron microscopy.

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“…The family Allocreadiidae Looss, 1902 is distributed worldwide and their members are mainly parasites of the digestive tract of freshwater fishes (see Caira & Bogéa, 2004). The studied specimens belong to a group of nine genera of allocreadiids characterized by having muscular lobes associated with the oral sucker, including Acrolichanus Ward, 1917; Auriculostoma Scholz, Aguirre-Macedo & Choudhury, 2004; Crepidostomum Braun, 1900; Creptotrema Travassos, Artigas & Pereira, 1928; Creptotrematina Yamaguti, 1954; Bunodera Railliet, 1896; Bunoderella Schell, 1964; Megalogonia Surber, 1928; and Pseudoparacreptotrema Pérez Ponce de León, Pinacho-Pinacho, Mendoza-Garfias, Choudhury & García-Varela, 2016 (Atopkin et al ., 2020; Pérez-Ponce de León et al ., 2020). However, our specimens conform with the diagnosis of the genus Auriculostoma in that they possess a single pair of oral lobes, funnel-shaped oral sucker and pretesticular uterus.…”

Section: Introductionmentioning

confidence: 99%

Description of a new species ofAuriculostoma(Digenea: Allocreadiidae) fromCharacidium heirmostigmata(Characiformes: Crenuchidae) from Argentina, using morphological and molecular data

et al. 2021

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During a parasitological survey of fishes at Iguazu National Park, Argentina, specimens belonging to the allocreadiid genus Auriculostoma were collected from the intestine of Characidium heirmostigmata. The erection of the new species is based on a unique combination of morphological traits as well as on phylogenetic analysis. Auriculostoma guacurarii n. sp. resembles four congeneric species – Auriculostoma diagonale, Auriculostoma platense, Auriculostoma tica and Auriculostoma totonacapanensis – in having smooth and oblique testes, but can be distinguished by a combination of several morphological features, hosts association and geographic distribution. Morphologically, the new species can be distinguished from both A. diagonale and A. platense by the egg size (bigger in the first and smaller in the last); from A. tica by a shorter body length, the genital pore position and the extension of the caeca; and from A. totonacapanensis by the size of the oral and ventral sucker and the post-testicular space. Additionally, one specimen of Auriculostoma cf. stenopteri from the characid Charax stenopterus (Characiformes) from La Plata River, Argentina, was sampled and the partial 28S rRNA gene was sequenced. The phylogenetic analysis revealed that A. guacurarii n. sp. clustered with A. tica and these two as sister taxa to A. cf. stenopteri. The new species described herein is the tenth species in the genus and the first one parasitizing a member of the family Crenuchidae.

show abstract

Amended diagnosis, validity and relationships of the genus Acrolichanus Ward, 1917 (Digenea: Allocreadiidae) based on the 28S rRNA gene, and observations on its lineage diversity

Cited by 14 publications

References 35 publications

Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

Disentangling the evolutionary and biogeographical history of the freshwater fish trematode genus Creptotrema (Digenea: Allocreadiidae) using an integrative taxonomy approach: the case of Creptotrema agonostomi in Middle American mountain mullets

Description of a new species ofAuriculostoma(Digenea: Allocreadiidae) fromCharacidium heirmostigmata(Characiformes: Crenuchidae) from Argentina, using morphological and molecular data

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