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7 results for “Pleuronematida”
Figure 8 in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 8. Phylogenetic tree based on the nuclear 18S rRNA gene as well as on the mitochondrial COI and 16S rRNA gene sequences, showing the systematic position of M. steenstrupi isolated from the plaited door snail Cochlodina laminata. The class Colpodea was used as the outgroup. Bootstrap values for maximum likelihood conducted in IQTrees as well as posterior probabilities for Bayesian inferences conducted in MrBayes and Phycas were mapped onto the best scoring IQ tree. Dash indicates mismatch between maximum likelihood and Bayesian tree topologies. Sequences marked in red were obtained during this study. Fully statistically supported nodes are marked with red solid circles. GenBank accession numbers can be found in Supporting Information (Table S6). The scale bar denotes six substitutions per one hundred nucleotide positions.
Figure 6 in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 6. Phylogenetic tree based on the nuclear 18S, 5.8S, and 28S rRNA gene sequences, showing the systematic position of M. steenstrupi isolated from the plaited door snail Cochlodina laminata. The subclass Scuticociliatia is represented by the orders Philasterida and Pleuronematida, the subclass Astomatia was used as the outgroup. Bootstrap values for maximum likelihood conducted in IQTrees as well as posterior probabilities for Bayesian inferences conducted in MrBayes and Phycas were mapped onto the best scoring IQ tree. Dash indicates mismatch between maximum likelihood and Bayesian tree topologies. Sequences marked in red were obtained during this study. Fully statistically supported nodes are marked with red solid circles. GenBank accession numbers can be found in Supporting Information (Table S2). The scale bar denotes seven substitutions per one hundred nucleotide positions.
Figure 2. M. steenstrupi after protargol impregnation. A, B in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 2. M. steenstrupi after protargol impregnation. A, B, top and bottom overviews of the same specimen, showing the ciliary pattern and nuclear apparatus. Black arrowheads mark the anterior suture, white double arrowheads denote the right lateral suture, white arrowheads denote the left lateral suture, and arrows mark the posterior suture. C, detail of the silverline system in the anterior body portion. D, semischematic diagram, showing the ciliary pattern within and around the mouth pocket. MA, macronuclear nodules; MI, micronucleus; PM, paroral membrane; SK, somatic kineties; SL, silverline; VK, vestibular kineties. Scale bars = 20 Μm (C), 55 Μm (A, B).
Figure 4. M in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 4. M. steenstrupi after protargol impregnation (A–D, H) and after silver nitrate impregnation (E–G). A, detail of the anterolateral body region, showing the anterior suture (black arrowhead) made by abutting anterior ends of ventral kineties and thigmotactic kineties. B, detail of the posterolateral body region, showing the posterior suture. C, frontal view, showing the entrance to the mouth pocket (arrow). Note that somatic kineties enter the mouth pocket to become vestibular kineties. D, optical section through the mouth pocket, showing the vestibular kineties, adoral organelle and paroral membrane. E–G, details of the cell surface, showing the somatic ciliary pattern and the silverline system. Black arrowheads mark the anterior suture, opposed white arrowheads denote the blank stripe within the right lateral suture, red arrows show the dikinetids of the thigmotactic field, and red arrowheads mark the horizontal silverlines. H, detail of the anterior body region, showing the thigmotactic field and the blank stripe within the right lateral suture (opposed white arrowheads). AO, adoral organelle; F, fibres, MP, mouth pockets; PM, paroral membrane; VK, vestibular kineties; SK, somatic kineties. Scale bars = 5 Μm (G), 10 Μm (B), 15 Μm (H), 20 Μm (A, C, E).
Figure 3. M in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 3. M. steenstrupi in vivo (A–D) and after protargol impregnation (E, F). A, B, ventral overviews of two representative individuals, showing the nuclear apparatus and the contractile vacuole. Arrow in (A) indicates the entrance to the mouth pocket. C, D, details of the posterior body region, showing the entrance to the mouth pocket (arrow) containing vestibular kineties, the nuclear and contractile vacuole apparatus as well as the posterior suture (opposed white arrowheads). E, top overview, showing the nuclear apparatus and the ciliary pattern. Black arrowheads mark the anterior suture, the white arrowhead denotes the left lateral suture. F, detail of nuclear apparatus of the specimen shown in (E). CV, contractile vacuole; MA, macronuclear nodules; MI, micronucleus; MP, mouth pocket; SK, somatic kineties; TF, thigmotactic field; VK, vestibular kineties. Scale bars = 15 Μm (C), 25 Μm (D), 30 Μm (F), 55 Μm (E), 60 Μm (A, B).
Figure 7 in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 7. Phylogenetic tree based on the mitochondrial COI nucleotide sequences, showing the systematic position of M. steenstrupi isolated from the plaited door snail Cochlodina laminata. The class Colpodea was used as the outgroup. Bootstrap values for maximum likelihood conducted in IQTrees as well as posterior probabilities for Bayesian inferences conducted in MrBayes and Phycas were mapped onto the best scoring IQ tree. Dash indicates mismatch between maximum likelihood and Bayesian tree topologies. Sequences marked in red were obtained during this study. Fully statistically supported nodes are marked with red solid circles. GenBank accession numbers can be found in Supporting Information (Table S3). The scale bar denotes twenty substitutions per one hundred nucleotide positions.
Figure 9 in Re-discovery and novel contributions to morphology and multigene phylogeny of Myxophyllum steenstrupi (Ciliophora: Pleuronematida), an obligate symbiont of terrestrial pulmonates
Figure 9. Putative tertiary (A) and secondary (B) structure of the ITS2 molecule of M. steenstrupi, and schematic diagrams of secondary structure of ITS2 molecules of the Philasterida (C), Pleuronematida (D), Myxophyllum (E) and Loxocephalida (F). Helices of the ITS2 molecule are marked by Roman numbers I–IV, the pyrimidine-pyrimidine mismatch of helix II is denoted by orange rectangle, systematically important regions of helix III are marked by violet and pink rectangles. Figures 9C, D and F are based on Gao et al. (2013).
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