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1,925 results for “Platyhelminthes”
Figure 2 in A study on the etymology of the scientific names given to planarians (Platyhelminthes, Tricladida) by Ernest Marcus' school
Figure 2. Hand drawings by Froehlich, E.M. of the live Geoplana yara. The green cephalic region motivated the author to use the specific epithet after Iara, the greenhaired Amazonian mermaid in the Brazilian folklore.
Data from: Validity of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes) upheld in phylogenomic analysis
Higher systematics within the Digenea, Carus 1863 have been relatively stable since a phylogenetic analysis of partial nuclear ribosomal markers (rDNA) led to the erection of the Diplostomida Olson, Cribb, Tkach, Bray, and Littlewood, 2003. However, recent mitochondrial (mt) genome phylogenies suggest this order might be paraphyletic. These analyses show members of two diplostomidan superfamilies are more closely related to the Plagiorchiida La Rue, 1957 than to other members of the Diplostomida. In one of the groups implicated, the Diplostomoidea Poirier, 1886, a recent phylogeny based on mt DNA also indicates the superfamily as a whole is non-monophyletic. To determine if these results were robust to additional taxon sampling, we analyzed mt genomes from seven diplostomoids in three families. To choose between phylogenetic alternatives based on mt genomes and the prior rDNA-based topology, we also analyzed hundreds of ultra-conserved elements (UCEs) assembled from shotgun sequencing. The Diplostomida was paraphyletic in the mt genome phylogeny, but supported in the UCE phylogeny. We speculate this mitonuclear discordance is related to ancient, rapid radiation in the Digenea. Both UCEs and mt genomes support the monophyly of the Diplostomoidea and show congruent relationships within it. The Cyathocotylidae Muhling, 1898 are early diverging descendants of a paraphyletic clade of Diplostomidae Poirier, 1886, in which were nested members of the Strigeidae Railliet, 1919; the results support prior suggestions that the Crassiphialinae Sudarikov, 1960 will rise to the family level. Morphological traits of diplostomoid metacercariae appear to be more useful for differentiating higher taxa than those of adults. We describe a new species of Cotylurus Szidat, 1928, resurrect a species of Hysteromorpha Lutz, 1931, and find support for a species of Alaria Schrank, 1788 of contested validity. Complete rDNA operons are provided as a resource for future studies.
Figure 9 in A new family of lithophoran Proseriata (Platyhelminthes), with the description of seven new species from the Indo-Pacific and South America, and the proposal of three new genera
Figure 9. Hard parts of the copulatory organ in the holotype of Dreuxiola philippi sp. nov.
Specimens from Brand et al. 2021, "Large-scale phylogenomics of the genus Macrostomum (Platyhelminthes) reveals cryptic diversity and novel sexual traits"
<p>The deposited folders contain image and video material of free-living flatworm specimens that were documented in vivo. These data support the following publication:</p> <p>Jeremias N. Brand, Gudrun Viktorin, R. Axel W. Wiberg, Christian Beisel, Lukas Schärer.<br> Large-scale phylogenomics of the genus<em> Macrostomum</em> (Platyhelminthes) reveals cryptic diversity and novel sexual traits.<br> Molecular Phylogenetics and Evolution. Volume 166. 2022. <a href="https://doi.org/10.1016/j.ympev.2021.107296">https://doi.org/10.1016/j.ympev.2021.107296</a></p> <p>For more information about these specimens see also http://macrostomorpha.info.</p>
Dugesia (Tricladida, Platyhelminthes) Cox1, 18S, 28S, ITS-1, DUNUC3, DUNUC5 datasets for worldwide biogeographic study
<p><strong><span>Aim:</span></strong><span> Freshwater planarians may have a wide geographic range despite their assumed low vagility. </span><span>Found across four continents, <em>Dugesia</em> may have either an ancient origin on a large paleo landmass, followed by colonisation in different regions before continental fragmentation, or a more recent origin and subsequent transoceanic dispersal. We seek to resolve between these two hypotheses.</span></p> <p><strong><span>Location:</span></strong><span><strong> </strong>Africa, Eurasia, and Australasia</span></p> <p><strong>Taxon: </strong><em>Genus Dugesia</em> (Platyhelminthes: Tricladida: Dugesiidae)</p> <p><strong><span>Methods:</span></strong><span> We used data from the sequencing of six gene fragments and comprehensive taxonomic sampling of <em>Dugesia</em> from across its </span><span>distribution range to reconstruct the phylogeny of this genus using maximum likelihood and bayesian inference methods. We conducted two phylogenetic dating analyses using Platyhelminthes fossils and palaeogeological events. Basing on the time-calibrated molecular phylogenetic framework we evaluated the contribution of vicariance and dispersal to the biogeographic evolution of <em>Dugesia</em>. By reconstructing the ancestral areas and present-day potential distribution using BioGeoBEARS and niche modelling, we elucidated the biogeographic history of the genus.</span></p> <p><strong><span>Results:</span></strong> <span>The present-day distribution of <em>Dugesia</em> is a result of different vicariance and dispersal events. However, we also found evidence of transoceanic dispersal. Consistent with previous hypotheses, <em>Dugesia</em> dates to the Upper Jurassic in the Afro-Malagasy Gondwana region. We unveiled a novel biogeographic scenario for the genus, involving multiple events of colonisation in Eurasia from continental Africa via at least three dispersal routes.</span></p> <p><strong><span>Main conclusions:</span></strong><span> <em>Dugesia</em> is an ancient genus having reached its present distribution through a complex history of dispersal and vicariant events following its origin in southern Gondwana. Despite the low vagility of <em>Dugesia</em>, we found evidence of their overseas dispersal.</span></p>
Fig. 2b in Aggregation and negative interactions in low-diversity and unsaturated monogenean (Platyhelminthes) communities in Astyanax aeneus (Teleostei) populations in a neotropical river of Mexico
Fig. 2b. Resemblance (Jaccard index) between components of community (August).
Fig. 2a in Aggregation and negative interactions in low-diversity and unsaturated monogenean (Platyhelminthes) communities in Astyanax aeneus (Teleostei) populations in a neotropical river of Mexico
Fig. 2a. Resemblance (Jaccard index) between components of community (February).
Fig. 13 in Histopathological characterisation of retinal lesions associated to Diplostomum species (Platyhelminthes: Trematoda) infection in polymorphic Arctic charr Salvelinus alpinus
Fig. 13. Diplostomum sp. metacercaria in a choroidal vessel. Scale bar = 200 μm.
Figure 1 in New records of Monogenoidea (Platyhelminthes) from three marine fish species from the coast of Angra dos Reis, Rio de Janeiro, Brazil
Figure 1. Map of the area of new geographical records.
Fig. 4 in Reproductive strategies of the parasitic flatworm Thaparocleidus vistulensis (Siwak, 1932) (Platyhelminthes, Monogenea) infecting the European catfish Silurus glanis Linnaeus, 1758
Fig. 4. Average hatching rates of T. vistulensis larvae.
Fig. 5 in Reproductive strategies of the parasitic flatworm Thaparocleidus vistulensis (Siwak, 1932) (Platyhelminthes, Monogenea) infecting the European catfish Silurus glanis Linnaeus, 1758
Fig. 5. Average in vitro survival rates of T. vistulensis at different life stages.
FIG. 1 in A new species of Gieysztoria Ruebush & Hayes, 1939 (Platyhelminthes, Rhabdocoela, Dalyelliidae) from Argentina with comments on geographical distribution of the genus in the Neotropical region
FIG. 1. — Study area: A, geographical location (● Reta locality); B, sampling site.
Figure 2 in Endemic freshwater planarians of Sardinia: Redescription of Dugesia hepta (Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus
Figure 2. Dugesia hepta. External features (from photographs of living specimens).
Figure 20. Procerodella asahinai, V in Biodiversity of marine planarians revisited (Platyhelminthes, Tricladida, Maricola)
Figure 20. Procerodella asahinai, V.Pl. 952.5, sagittal reconstruction of the copulatory apparatus.
Figure 21. Procerodella asahinai, V in Biodiversity of marine planarians revisited (Platyhelminthes, Tricladida, Maricola)
Figure 21. Procerodella asahinai, V.Pl. 952.2, sagittal reconstruction of the copulatory apparatus.
FIG. 2. — Temnosewellia vietnamensis n in A new species of Temnosewellia (Platyhelminthes, Temnocephalida) ectosymbiont on Villopotamon thaii (Crustacea, Decapoda, Potamidae) from Vietnam
FIG. 2. — Temnosewellia vietnamensis n. sp., photomicrographs of wholemount. Scale bar: 400 μm.
FIG. 2. — Amphibdelloides kechemirae n in Nouveaux Amphibdellatidae (Platyhelminthes, Monogenea, Monopisthocotylea) parasites des Torpedinidae (Pisces, Elasmobranchii) de Méditerranée
FIG. 2. — Amphibdelloides kechemirae n. sp., individu adulte in
A stratified compartmental model for the transmission of Sparicotyle chrysophrii (Platyhelminthes: Monogenea) in gilthead seabream (Sparus aurata) fish farms
<p>This repository hosts data and model codes of the paper:</p> <p>"A stratified compartmental model for the transmission of Sparicotyle chrysophrii (Platyhelminthes: Monogenea) in gilthead seabream (Sparus aurata) fish farms" <br> by Stella et al., Royal Society Open Science, 2023. doi:https://doi.org/10.1098/rsos.221377</p> <p>Programming Language: MatLab</p> <p>The code has been tested on Matlab R2019b.</p> <p>Run the Main_Sparicotyle.m file code to reproduce Figures 2, 3, and 5 to 9 of the paper. </p> <p> </p>
Fig. 7 in Gill Monogeneans (Platyhelminthes) Parasitic on Gnathopogon elongatus elongatus and G. caerulescens (Cypriniformes: Gobionidae) from Japan, with Descriptions of One New Species of Dactylogyrus and Three New Species of Bivaginogyrus (Dactylogyridae)
Fig. 7. Whole body of Bivaginogyrus cingulatus n. sp. (paratype, MPM Coll.-No. 21925, dorsal view).
Fig. 1 in Gill Monogeneans (Platyhelminthes) Parasitic on Gnathopogon elongatus elongatus and G. caerulescens (Cypriniformes: Gobionidae) from Japan, with Descriptions of One New Species of Dactylogyrus and Three New Species of Bivaginogyrus (Dactylogyridae)
Fig. 1. Measurement axes of hard parts of Dactylogyrus and Bivaginogyrus.
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