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447 results for “parasitic nematode”
FIGURE 2 in Synoecnema watinagii (Drilonematoidea: Ungellidae: Synoecneminae), a new nematode species parasitic in earthworms from the Philippines with the first molecular and SEM data for the genus
FIGURE 2. SEM images of Synoecnema watinagii sp. n. A, C, E, G, H, female; B, D, F, male. A: entire view (subventral); B: entire view (lateral); C: cephalic hooks (lateral); D: head end at the level of excretory pore (subventral); E: vulva region, lateral; F: male cloaca, lateral; G: middle part of caudal organ, lateral; H: margin of caudal organ, lateral. Scale bars: A, 100 Μm; B, 20 Μm; C, 3 Μm; D, 1 Μm; E, 5 Μm; F, 10 Μm; G, 5 Μm; H, 5 Μm.
FIGURE 4. Phasmarhabditis bonaquaense n in Phasmarhabditis bonaquaense n. sp. (Nematoda: Rhabditidae), a new slug-parasitic nematode from the Czech Republic
FIGURE 4. Phasmarhabditis bonaquaense n. sp. scanning electron microscopy: Dauer juveniles A–B. A: DJs, head region with aphid (a) and lateral fields; B: DJs, tail region with anus, phasmid (p) and lateral fields. Females C–E. C: female, head region with labial papillae (lp), cephalic papillae (cp), small papilla-like protrusion (p) and amphid (a); D: female, tail region with phasmids (p), tail terminus broken; E: female, lateral fields. Males F. F: male, tail region with bursa and single papilla (s).
FIGURE 3. Phasmarhabditis bonaquaense n in Phasmarhabditis bonaquaense n. sp. (Nematoda: Rhabditidae), a new slug-parasitic nematode from the Czech Republic
FIGURE 3. Phasmarhabditis bonaquaense n. sp. light microscopy: Males A–B. A: male, tail region, lateral view; B: male, tail region, ventral view. Dauer juveniles C–D. C: DJs, tail region; D: DJs, head region.
FIGURE 2. Phasmarhabditis bonaquaense n in Phasmarhabditis bonaquaense n. sp. (Nematoda: Rhabditidae), a new slug-parasitic nematode from the Czech Republic
FIGURE 2. Phasmarhabditis bonaquaense n. sp. light microscopy: Females A–D. A: female, tail region, ventral view; B: female, tail region, lateral view; C: female, mid-body region with vulva; D: females, head region.
FIGURE 1. Rhigonema naylae n in Rhigonema naylae n. sp. (Rhigonematomorpha: Rhigonematidae) a new parasitic nematode from a Japanese polydesmid millipede (Polydesmida: Xystodesmidae)
FIGURE 1. Rhigonema naylae n. sp. Female. A. Oesophageal region, lateral view. B. Cephalic end, optical section. C. Tail, lateral view. D. Vaginal region, lateral view. E. Habitus, lateral view.
FIGURE 3. Rhigonema naylae n in Rhigonema naylae n. sp. (Rhigonematomorpha: Rhigonematidae) a new parasitic nematode from a Japanese polydesmid millipede (Polydesmida: Xystodesmidae)
FIGURE 3. Rhigonema naylae n. sp. SEM images. A. Female cephalic end, dorso-lateral view. B. Male cephalic end, en face view. C. Male oral opening. D. Male tail region, ventro-lateral view. E. Male tail end showing the arrangement of the postcloacal papillae, lateral view. F. Spicule everted from cloaca, lateral view. Scale bars: A, E. 20 µm. B, C, F. 10 µm. D. 50 µm.
FIGURE 2. Rhigonema naylae n in Rhigonema naylae n. sp. (Rhigonematomorpha: Rhigonematidae) a new parasitic nematode from a Japanese polydesmid millipede (Polydesmida: Xystodesmidae)
FIGURE 2. Rhigonema naylae n. sp. Male. A. Cephalic end, en face view (reconstructed from SEM images). B. Optical section of tail, lateral view. C. Posterior region showing the arrangement of the copulatory papillae, ventro-lateral view (reconstructed from SEM images). D. Tail, lateral view (reconstructed from SEM images). E. Spicule, lateral view. F. Habitus, lateral view.
FIGURES 15–16 in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURES 15–16. Microsporidian infections of secondary generation females of Parasitylenchus myiophagus n. sp. 15. Head area showing clusters of developing spores (arrowheads). 16. Head area showing spores adjacent to swollen excretory pore area (arrowhead). Scale bars: 15 = 17 µm; 16 = 13 µm.
FIGURES 13–14 in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURES 13–14. Effect of tylenchid parasites on morphological structures of male Tachytrechus sanus. 13. Non-infected male. 14. Infected male. Note signs of demasculinization including shorter antenna with smaller apical lamella (left arrow), darker legs (middle arrow) and smaller, poorly rotated genitalia (right arrow). Scale bars: 13 = 1.5 mm; 14 = 1.6 mm.
FIGURES 9–12. Parasitylenchus myiophagus n in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURES 9–12. Parasitylenchus myiophagus n. sp. 9. Head of first generation parasitic female. 10. Head of male. 11. Male tail. 12. Tip of first generation parasitic female showing location of nerve ring. Abbreviations: B= bursa; N = nerve ring; O= tip of ovary; S= stylet; Sp = spicules; T= tip of testis. Scale bars: 9 = 64 µm; 10 = 25 µm; 11 = 10 µm; 12 = 58µm.
FIGURES 5–8. Second generation parasitic Parasitylenchus myiophagus n in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURES 5–8. Second generation parasitic Parasitylenchus myiophagus n. sp. 5. Female. 6. Male, arrowhead shows stylet. 7. Spicules (arrows) of male. 8. Newly hatched second generation juvenile. Scale bars: 5 = 70 µm; 6 = 50 µm; 7 = 7 µm; 8 = 12 µm.
FIGURE 4 in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURE 4. Clusters containing eggs, developing juveniles and second generation adults of Parasitylenchus myiophagus n. sp. Scale bar: 100 µm.
FIGURES 2–3 in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURES 2–3. First generation parasitic female of Parasitylenchus myiophagus n. sp. 2. Female removed from the abdomen of Tachytrechus sanus (Diptera: Dolichopodidae), arrow shows nerve ring. 3. Head, arrow shows tip of extended ovary with developing eggs, arrowhead shows stylet. Scale bars: 2 = 380 µm; 3 = 34 µm.
FIGURE 1 in Parasitylenchus myiophagus n. sp. (Nematoda: Parasitylenchidae), a tylenchid nematode parasite of long-legged flies (Diptera: Dolichopodidae)
FIGURE 1. Male Tachytrechus sanus (Diptera: Dolichopodidae) parasitized by Parasitylenchus myiophagus n. sp. Arrow shows exposed portion of abdomen containing first and second generation adult nematodes. Scale bar: 1.4 mm.
A highly divergent Wolbachia with a tiny genome in an insect-parasitic tylenchid nematode
<p class="MsoNormal"><em>Wolbachia</em> symbionts are the most successful host-associated microbes on the planet, infecting arthropods and nematodes. Their role in nematodes is particularly enigmatic, with filarial nematode species either 100% infected and dependent on symbionts for reproduction and development, or not at all infected. We have discovered a highly divergent strain of <em>Wolbachia</em> in an insect-parasitic tylenchid nematode, <em>Howardula</em> sp., in a nematode clade that has not previously been known to harbour <em>Wolbachia</em>. While this nematode is 100% infected with <em>Wolbachia</em>, we did not detect it in related species. We sequenced the<em> Howardula</em> symbiont (<em>w</em>How) genome and found that it is highly reduced, comprising only 550 kilobase pairs of DNA, ~35% smaller than the smallest <em>Wolbachia</em> nematode symbiont genomes. The <em>w</em>How genome is a subset of all other <em>Wolbachia</em> genomes and has not acquired any new genetic information. While it has lost many genes, including genes involved in cell wall synthesis and cell division, it has retained the entire heme biosynthesis pathway, suggesting that heme supplementation is critical. <em>w</em>How provides key insights into our understanding of what are the lower limits of <em>Wolbachia</em> cells, as well as the role of <em>Wolbachia</em> symbionts in the biology and convergent evolution of diverse parasitic nematodes.</p>
Single-cell RNA-seq datasets derived from human parasitic nematode Brugia malayi microfilariae
<p>Single-cell RNA-seq data of the parasitic nematode <em>Brugia malayi</em> in the microfilariae development stage. Data includes untreated cellular transcriptional states and the transcriptional response to ivermectin (1 µM). </p> <p>The unfiltered gene expression matrix is provided as both a Seurat and AnnData object. Filtered datasets are provided as .csv files for direct import into R. </p>
FIGURE 3. Protrelleta floridana Chitwood, 1932. Male. A. Oesophageal region, lateral view. B. Cephalic end, optical section. C. Tail, lateral view. D in Morphological and molecular characterization of two species of nematodes (Oxyuridomorpha: Thelastomatoidea: Protrelloididae, Thelastomatidae) parasitic in the cockroach Blaberus discoidalis Serville (Blattaria: Blaberidae) from Cuba
FIGURE 3. Protrelleta floridana Chitwood, 1932. Male. A. Oesophageal region, lateral view. B. Cephalic end, optical section. C. Tail, lateral view. D. Habitus, lateral view.
FIGURE 4. Protrelleta floridana Chitwood, 1932. SEM images. Male. A. Habitus, lateral view. B in Morphological and molecular characterization of two species of nematodes (Oxyuridomorpha: Thelastomatoidea: Protrelloididae, Thelastomatidae) parasitic in the cockroach Blaberus discoidalis Serville (Blattaria: Blaberidae) from Cuba
FIGURE 4. Protrelleta floridana Chitwood, 1932. SEM images. Male. A. Habitus, lateral view. B. Cervical region showing the beginning of the lateral ala, lateral view. C. Anterior end. D. Anterior end, en face view. E. Posterior end, lateral view (extension of the dorsal cuticular thickening of the tail pointed by the white arrowheads). F. Tail tip, lateral view (phasmid pointed by the white arrowhead). Scale bars: A. 50 µm. B. 10 µm. C, D, F. 2 µm. E. 5 µm.
FIGURE 6 in Morphological and molecular characterization of two species of nematodes (Oxyuridomorpha: Thelastomatoidea: Protrelloididae, Thelastomatidae) parasitic in the cockroach Blaberus discoidalis Serville (Blattaria: Blaberidae) from Cuba
FIGURE 6. Cranifera cranifera (Chitwood, 1932). SEM images. Female. A. Cervical region, lateral view. B. Tail, lateral view. C. Anus region and phasmid (pointed by the white arrowhead), lateral view. D. Cephalic end, en face view. E. Vulva, ventral view. Scale bars: A, C. 20 µm. B. 100 µm. D. 5 µm. E. 10 µm.
FIGURE 2. Protrelleta floridana Chitwood, 1932. SEM images. Female. A. Oesophageal region, lateral view. B. Cephalic end, lateral view. C in Morphological and molecular characterization of two species of nematodes (Oxyuridomorpha: Thelastomatoidea: Protrelloididae, Thelastomatidae) parasitic in the cockroach Blaberus discoidalis Serville (Blattaria: Blaberidae) from Cuba
FIGURE 2. Protrelleta floridana Chitwood, 1932. SEM images. Female. A. Oesophageal region, lateral view. B. Cephalic end, lateral view. C. Excretory pore and vulva, ventro-lateral view. D, E. Anterior end, en face view. Scale bars: A. 20 µm. B, D. 5 µm. C. 10 µm. E. 2 µm.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.