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196 results for “Echinoderms”
Fig. 5. Non−trilobite fossils from the orsten samples. A. Echinoderm columnal, SMNH X3566 in Phosphatised olenid trilobites and associated fauna from the Upper Cambrian of Västergötland, Sweden
Fig. 5. Non−trilobite fossils from the orsten samples. A. Echinoderm columnal, SMNH X3566 (3.5), sample 2. B. Echinoderm columnal, SMNH X3567 (3.6), sample 2. Stereom structure shown in B2. C. Conulariid(?) fragment, SMNH X3568 (3.16), sample 8 (Peltura minor Zone). D. Funnel−like fossil, SMNH X3569 (3.16), sample 2. E. Anatolepis−like fragment, SMNH X3570 (4.1), sample 2. Spines preserved in different degrees of abrasion (E2). F. Semicircular fossil, SMNH X3571 (3.1), sample 2. G. Dermal scale(?), SMNH X3572, (3.15), sample 2. H. Camaroid graptolite(?), SMNH X3573 (3.9), sample 1. All scale bars, except C4, are 0.1 mm.
Linked collectors and determiners for: The echinoderm collection (IE) of the Muséum national d'Histoire naturelle (MNHN - Paris).
Natural history specimen data linked to collectors and determiners held within, "The echinoderm collection (IE) of the Muséum national d'Histoire naturelle (MNHN - Paris)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/b568aebb-b2c8-4dd2-8a59-ab74d50f8640">https://bionomia.net/dataset/b568aebb-b2c8-4dd2-8a59-ab74d50f8640</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/b568aebb-b2c8-4dd2-8a59-ab74d50f8640">https://gbif.org/dataset/b568aebb-b2c8-4dd2-8a59-ab74d50f8640</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: UWIZM Echinoderms.
Natural history specimen data linked to collectors and determiners held within, "UWIZM Echinoderms". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/743988be-524a-4095-986c-824da5a8e5f4">https://bionomia.net/dataset/743988be-524a-4095-986c-824da5a8e5f4</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/743988be-524a-4095-986c-824da5a8e5f4">https://gbif.org/dataset/743988be-524a-4095-986c-824da5a8e5f4</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Echinoderms Collection - National Museum of Natural History, Chile.
Natural history specimen data linked to collectors and determiners held within, "Echinoderms Collection - National Museum of Natural History, Chile". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/28205d79-fe89-4007-8fc9-834bc52d4c70">https://bionomia.net/dataset/28205d79-fe89-4007-8fc9-834bc52d4c70</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/28205d79-fe89-4007-8fc9-834bc52d4c70">https://gbif.org/dataset/28205d79-fe89-4007-8fc9-834bc52d4c70</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: LACM Echinoderms.
Natural history specimen data linked to collectors and determiners held within, "LACM Echinoderms". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/fe1cedbd-3171-4370-b5b1-1323fc8492c7">https://bionomia.net/dataset/fe1cedbd-3171-4370-b5b1-1323fc8492c7</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/fe1cedbd-3171-4370-b5b1-1323fc8492c7">https://gbif.org/dataset/fe1cedbd-3171-4370-b5b1-1323fc8492c7</a>. Formatted as a Frictionless Data package.
Data from: Arm waving in stylophoran echinoderms: three-dimensional mobility analysis illuminates cornute locomotion
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Scan files, 3D reconstructions, data spreadsheet and supplementary files for Heterochrony and parallel evolution of echinoderm, hemichordate and cephalochordate internal bars
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Data from: Exploring rates of change and modes of evolution in blastozoan echinoderms
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Echinoderm sperm swimming and fertilization
<p>In an era of climate change, impacts on the marine environment include warming and ocean acidification. These effects can be amplified in shallow coastal regions where conditions often fluctuate widely. This type of environmental variation is potentially important for many nearshore species that are broadcast spawners, releasing eggs and sperm into the water column for fertilization. We conducted two experiments to investigate: 1) the impact of water temperature on sperm swimming characteristics and fertilization rate in sand dollars (<em>Dendraster excentricus</em>) and sea urchins (<em>Mesocentrotus franciscanus</em>) and; 2) the combined effects of multiple stressors (water temperature and pH) on these traits in sand dollars. We quantify thermal performance curves showing that sand dollar fertilization rates, sperm swimming velocities, and sperm motility display remarkably wide thermal breadths relative to red urchins, perhaps reflecting the wider range of water temperatures experienced by sand dollars at our field sites. For sand dollars, both temperature (8, 16, 24°C) and pH (7.1, 7.5, 7.9) affected fertilization but only temperature influenced sperm swimming velocity and motility. Although sperm velocities and fertilization were positively correlated, our fertilization kinetics model dramatically overestimated measured rates and this discrepancy was most pronounced under extreme temperature and pH conditions. Our results suggest that environmental stressors like temperature and pH likely impair aspects of the reproductive process beyond simple sperm swimming behavior.</p>
Figure 1 in Echinoderms from Santa Catarina, southern Brazil: an update on biodiversity and distribution
Figure 1. Some echinoderm species from Santa Catarina. (A) Astropyga sp. (Arvoredo Island; Photo: Jéssica Link), (B) Holothuria (Halodeima) grisea (Arvoredo Island; Photo: Thiago Fiuza), (C) Clypeaster subdepressus (Xavier Island; Photo: Nataly Slivak), (D) Narcissia trigonaria (Xavier Island; Photo: João Luís Carraro).
Figure 2 in Echinoderms from Santa Catarina, southern Brazil: an update on biodiversity and distribution
Figure 2. Map of Santa Catarina State, Brazil, showing the record sites of echinoderm species (red circles).
Figure 3 in Echinoderms from Santa Catarina, southern Brazil: an update on biodiversity and distribution
Figure 3. Some echinoderms species from Santa Catarina. (A) Echinaster (Othilia) brasiliensis (Xavier Island; Photo: Nataly Slivak), (B) Coscinasterias tenuispina (Xavier Island; Photo: Nataly Slivak), (C) Mellita quinquiesperforata (Saco do Capim – Arvoredo Island; Photo: Jonathan Lawley), (D) Lytechinus variegatus (Xavier Island; Photo: Nataly Slivak), (E) Ophiothela mirabilis (Photo: Jonathan Lawley), (F) Isosticopus badionotus (Rancho Norte-Arvoredo Island; Photo: Nataly Slivak).
Fig. 25 in New insights into the origin and relationships of blastoid echinoderms
Fig. 25. Strict consensus tree for taxa listed in Table 1.
Fig. 2 in Two newly recorded echinoderms from the mesophotic zone in Korea
Fig. 2. Abactinal and actinal side of Henricia irregularis Hayashi, 1940 in this study.
Fig. 5 in Two newly recorded echinoderms from the mesophotic zone in Korea
Fig. 5. Dorsal and ventral side of Parastichopus nigripunctatus (Augustin, 1908) in this study.
Fig. 1 in Two newly recorded echinoderms from the mesophotic zone in Korea
Fig. 1. Distribution of Henricia irregularis Hayashi, 1940 based on the present and previous study.
Acorn worm ossicle ultrastructure and composition and the origin of the Echinoderm skeleton
<p>The excel.data file with ossicle size measurement used to get the mean sizes and supplementary Fig. 2.</p> <p>Raw Raman spectra and R code used to determinate the polymorph of enteropneusts calcium carbonate ossicles, and make Fig. 3</p>
Single-nucleus profiling highlights the all-brain echinoderm nervous system
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Data from: The Phylogeny of the Diploporita: a polyphyletic assemblage of blastozoan echinoderms
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Echinoderm sperm swimming and fertilization
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