Multidisciplinary investigation on the catfish parasite <i>Hamatopeduncularia</i> Yamaguti, 1953 (Monogenoidea: Dactylogyridae): description of two new species from India, and phylogenetic considerations

Illa, K.; Shameem, U.; Serra, Valentina; Melai, M.; Mangam, S.; Basuri, Charan Kumar; Petroni, Giulio; Modeo, Letizia

doi:10.1080/24750263.2019.1597931

Cited by 10 publications

(10 citation statements)

References 64 publications

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“…Phylogenetic support: previous studies have indicated the close relationship of these two genera (Wu et al, 2008). Furthermore, sometimes unpublished sequences of species of Mizelleus (see Illa et al, 2019;Soares et al, 2021) were incorporated highlighting a close relationship of these species to species of Bychowskyella.…”

Section: Includesmentioning

confidence: 91%

“…Susanlimocotyle (Soo and Tan, 2021), and sometimes incorporated unpublished sequences of species of Mizelleus (see Illa et al, 2019;Soares et al, 2021). Host taxa: siluriform species (Bagridae and Siluridae).…”

Section: Includesmentioning

confidence: 99%

“…-Hamatopeduncularia isosimplex Lim, 1996 -Hamatopeduncularia longiangusticirrata Soo & Tan, 2021-Hamatopeduncularia longicopulatrix Lim, 1996 -Hamatopeduncularia madhaviae Illa, Shameem, Serra, Melai, Mangam, Basuri, Petroni & Modeo, 2019-Hamatopeduncularia major Kearn & Whittington, 1994 -Hamatopeduncularia malaccensis Lim, 1996 -Hamatopeduncularia malayana (Lim, 1994) comb. nov.…”

Section: Hamatopeduncularia Yamaguti 1953mentioning

confidence: 99%

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Dactylogyridae 2022: a meta-analysis of phylogenetic studies and generic diagnoses of parasitic flatworms using published genetic and morphological data

Kmentová¹,

Cruz-Laufer²,

Pariselle³

et al. 2021

Preprint

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Dactylogyridae is one of the most studied families of parasitic flatworms with more than 1000 species and 166 genera described to date including ecto-, meso-, and endoparasites. Dactylogyrid monogeneans have been used as model organisms for host-parasite macroevolutionary and biogeographical studies due to the scientific and economic importance of some of their host lineages. Consequently, an array of phylogenetic research into different dactylogyrid lineages has been produced over the past years but the last family-wide study was published over a decade ago. Here, we provide a new phylogeny of Dactylogyridae including representatives of all the genera with available molecular data. First, we discuss morphological, host range, biogeographical, and freshwater-marine patterns. Second, we provide an overview of the current state of the systematics of the family, and its subfamilies and genera. Third, we elaborate on the implications of taxonomic, citation, and confirmation bias in past studies. We found two well-supported main lineages which we assigned to the subfamilies Dactylogyrinae and Ancyrocephalinae. The subfamilies further include 11 well-supported clades whose members share only few diagnostic morphological features. Our study highlights the discrepancy between morphological similarities and molecular phylogenetic relationships in some dactylogyrid lineages. Environmental changes might have induced morphological adaptation, e.g. changes in the attachment organ in response to marine-freshwater habitat switches or reduction of eyespots related to water turbidity. Moreover, synonymisation of some of the para- or polyphyletic genera is proposed. We conclude that a strong taxonomic bias further limits knowledge on biogeographical evolutionary patterns that can be inferred from these results. Finally, we propose addressing potential citation and confirmation biases through a ‘level playing field’ multiple sequence alignment as provided by this study.

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Section: Includesmentioning

confidence: 91%

Section: Includesmentioning

confidence: 99%

Section: Hamatopeduncularia Yamaguti 1953mentioning

confidence: 99%

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Dactylogyridae 2022: a meta-analysis of phylogenetic studies and generic diagnoses of parasitic flatworms using published genetic and morphological data

Kmentová¹,

Cruz-Laufer²,

Pariselle³

et al. 2021

Preprint

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show abstract

“…Characterization of the ciliate host and its bacterial endosymbiont was performed through the “full cycle rRNA approach” [77], i.e. through the nuclear 18S rRNA gene (generally considered the preferred marker to study molecular taxonomy and phylogeny of eukaryotic organisms - just as an example see [78]), ITS region and partial 28S gene (ciliate), and 16S rRNA gene (endosymbiont) sequencing, combined with Fluorescence In Situ Hybridization (FISH) experiments. Additionally, mitochondrial cytochrome c oxidase subunit I (COI) gene was sequenced as well, to display haplogroup variation in P. multimicronucleatum [79].…”

Section: Methodsmentioning

confidence: 99%

Outwitting planarian’s antibacterial defence mechanisms:Rickettsialesbacterial trans-infection fromParamecium multimicronucleatumto planarians

Modeo

Salvetti

Rossi

et al. 2019

Preprint

Self Cite

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AS) 22 23 RUNNING PAGE HEAD: Rickettsiales macronuclear endosymbiont of a ciliate can transiently 24 enter planarian tissues 25 Abstract 38 Most of the microorganisms belonging to genera responsible for vector-borne diseases (VBD) have 39 hematophagous arthropods as vector/reservoir. Recently, many new species of microorganisms 40 phylogenetically related to agents of VBD were found in a variety of aquatic eukaryotic hosts, in 41 particular, numerous new bacterial species related to the genus Rickettsia (Alphaproteobacteria,42 Rickettsiales) were discovered in protist ciliates and other unicellular eukaryotes. Although their 43 pathogenicity for humans and terrestrial animals is not known, these bacteria might act as 44 etiological agents of possible VBD of aquatic organisms, with protist as vectors. In the present 45 study, we characterized a novel strain of the Rickettsia-Like Organism (RLO) endosymbiont 46 "Candidatus (Ca.) Trichorickettsia mobilis" in the macronucleus of the ciliate Paramecium 47 multimicronucleatum through Fluorescence In Situ Hybridization (FISH) and molecular analyses.48 Ultrastructural investigations on the presence of flagella confirmed previous studies on the same 49 bacterial species. The potential trans-infection per os of this bacterium to planarians (Dugesia 50 japonica), a widely used model system able to eliminate a wide range of bacteria pathogenic to 51 humans and other Metazoa, was further verified. Ciliate mass cultures were set up, and trans-52 infection experiments were performed by adding homogenized paramecia to food of antibiotic-53 treated planarians, performed. Treated and non-treated (i.e. control) planarians were investigated at 54 day 1, 3, and 7 after feeding for endosymbiont presence by means of PCR and ultrastructural 55 analyses. Obtained results were fully concordant and suggest that this RLO endosymbiont can be 56 transferred from ciliates to metazoans, being detected up to day 7 in treated planarian enterocytes 57 inside and, possibly, outside phagosomes. 58 59 KEY WORDS Planarians, molecular and ultrastructural investigations, Rickettsiaceae, RLO 60 endosymbiont, trans-infection experiments, vector-borne disease 61 4 62 Introduction63 Bacteria of order Rickettsiales (Alphaproteobacteria) live in an obligate association with a wide range 64 of eukaryotes [1-8], and, for their vast majority, are localized intracellularly, although the case of an 65 extracellular Rickettsiales bacterium was recently documented [9]. Rickettsiales are widely studied 66 for their involvement in medical and veterinary fields. Indeed, many of them (e.g. Rickettsia spp., 67 Anaplasma spp., Ehrlichia spp., and Orientia tsutsugamushi) are vectored by lice, ticks and mites, 68 and cause mild to severe disease [1, 10], such as epidemic typhus, Rocky Mountain spotted fever [11-69 13], anaplasmosis, ehrlichiosis [14, 15], heartwater [16], and scrub typhus [17]. 70 In the last two decades, many new genera and species of Rickettsiales were found as symbionts 71 in a variety of other non-vecto...

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“…Characterization of the ciliate host and its bacterial endosymbiont was performed through the ''full cycle rRNA approach'' (Amann, Ludwig & Schleifer, 1995), i.e., through the nuclear 18S rRNA gene (generally considered the preferred marker to study molecular taxonomy and phylogeny of eukaryotic organisms-just as an example see Illa et al, 2019), ITS region and partial 28S gene (ciliate), and 16S rRNA gene (endosymbiont) sequencing, combined with Fluorescence In Situ Hybridization (FISH) experiments. Additionally, mitochondrial cytochrome c oxidase subunit I (COI) gene was sequenced as well, to display haplogroup variation in P. multimicronucleatum (Barth et al, 2006).…”

Section: Characterization Of Ciliate and Endosymbiontmentioning

confidence: 99%

“Candidatus Trichorickettsia mobilis”, a Rickettsiales bacterium, can be transiently transferred from the unicellular eukaryote Paramecium to the planarian Dugesia japonica

Modeo

Salvetti

Rossi

et al. 2020

PeerJ

View full text Add to dashboard Cite

Most of the microorganisms responsible for vector-borne diseases (VBD) have hematophagous arthropods as vector/reservoir. Recently, many new species of microorganisms phylogenetically related to agents of VBD were found in a variety of aquatic eukaryotic hosts; in particular, numerous new bacterial species related to the genus Rickettsia (Alphaproteobacteria, Rickettsiales) were discovered in protist ciliates and other unicellular eukaryotes. Although their pathogenicity for humans and terrestrial animals is not known, several indirect indications exist that these bacteria might act as etiological agents of possible VBD of aquatic organisms, with protists as vectors. In the present study, a novel strain of the Rickettsia-Like Organism (RLO) endosymbiont “Candidatus (Ca.) Trichorickettsia mobilis” was identified in the macronucleus of the ciliate Paramecium multimicronucleatum. We performed transfection experiments of this RLO to planarians (Dugesia japonica) per os. Indeed, the latter is a widely used model system for studying bacteria pathogenic to humans and other Metazoa. In transfection experiments, homogenized paramecia were added to food of antibiotic-treated planarians. Treated and non-treated (i.e. control) planarians were investigated at day 1, 3, and 7 after feeding for endosymbiont presence by means of PCR and ultrastructural analyses. Obtained results were fully concordant and suggest that this RLO endosymbiont can be transiently transferred from ciliates to metazoans, being detected up to day 7 in treated planarians’ enterocytes. Our findings might offer insights into the potential role of ciliates or other protists as putative vectors for diseases caused by Rickettsiales or other RLOs and occurring in fish farms or in the wild.

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Multidisciplinary investigation on the catfish parasite Hamatopeduncularia Yamaguti, 1953 (Monogenoidea: Dactylogyridae): description of two new species from India, and phylogenetic considerations

Cited by 10 publications

References 64 publications

Dactylogyridae 2022: a meta-analysis of phylogenetic studies and generic diagnoses of parasitic flatworms using published genetic and morphological data

Dactylogyridae 2022: a meta-analysis of phylogenetic studies and generic diagnoses of parasitic flatworms using published genetic and morphological data

Outwitting planarian’s antibacterial defence mechanisms:Rickettsialesbacterial trans-infection fromParamecium multimicronucleatumto planarians

“Candidatus Trichorickettsia mobilis”, a Rickettsiales bacterium, can be transiently transferred from the unicellular eukaryote Paramecium to the planarian Dugesia japonica

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