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668 results for “polychaetes”
Figure 9 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 9 Prosphaerosyllis modinouae sp. nov. (holotype, NHM.2018.25100) a specimen in partial ventral view b, c examples of ventral cirri (Vc) and elongated lateral body papillae (Lp) d example of parapodium e detail of aciculae. Scale bars: 250 µm (a); 50 µm (c, d); 20 µm (e).
Figure 4 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 4 Harmothoe anderssoni (SEM micrograph), (voucher, NHM.2018.21524) a detached elytron from mid-body b detail of the multifid macrotubercles c detail of the posterior elytral margin d detail of microtubercules from the mid-section of the elytra e detail of conical microtubercules near the anterior elytral margin f detail of bidentate neurochaetae. Scale bars: 500 µm (a); 100 µm (b, c, e); 50 µm (d); 20 µm (f).
Figure 26 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 26 Dodecaceria saeria sp. nov. a dorso-lateral view of anterior end b pygidium and distal segments.
Figure 11 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 11 Comparative figure of Sphaerosyllis palpopapillata (holotype, ZMH P-20751) (a) and Prosphaerosyllis modinouae sp. nov. (b, c). Scale bars: 1 mm.
Figure 10 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 10 Prosphaerosyllis modinouae sp. nov. (paratype NHM.2018.24386) a simple dorsal chaeta from anterior chaetiger b simple dorsal chaeta from posterior chaetiger c simple ventral chaeta from posterior chaetgier d dorsalmost falciger from anterior chaetiger e ventralmost falciger from anterior chaetiger f dorsalmost chaeta from mid body chaetiger g falcigers from posterior chaetiger. Scale bar: 50 µm.
Figure 2 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 2 Harmothoe anderssoni (voucher NHM.2018.24629, unless stated otherwise) a complete specimen (in two fragments) in dorsal view b SEM micrograph of the complete specimen in dorsal view (voucher, NHM.2018.21524) c detail of prostomium in dorsal view d pygidium with pygidial cirri in ventral view. Scale bars: 1 mm (a, d); 2 mm (b).
Figure 15 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 15 Chaetae of Apistobranchus jasoni sp. nov. (holotype NHM.2018.12712) a abdominal chaetiger b detail of neuropodial acicular chaeta and accompanying capillary c, d overview of neuropodial chaetal fascicle with long capillaries with frayed (damaged) tips and short falcate chaetae e detail short falcate neurochaetae. Scale bar: 250 µm (a); 25 µm (b); 100 µm (c–e).
Figure 23 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 23 Aphelochaeta falklandica sp. nov. (holotype NHM.2018.21708), Methyl Green Staining patterns a complete specimen b ventral view of thoracic chaetigers showing methyl green stained bands across the thorax c dorsal view of head and thoracic chaetigers d close up of head region e dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles f detail of pygidial region showing anal lobes. Scale bars: 1 mm (a).
Figure 3 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 3 Harmothoe anderssoni (voucher, NHM.2018.24629) a mid-body parapodium, insert showing line drawing of supra-acicular neuropodial lobe b bidentate neurochaetae c unidentate neurochaetae d mid-body elytron showing elongated marginal papillae e detail of elytral surface from mid-body elytron showing multifid macrotubercules. Scale bars: 500 µm (a, d); 50 µm (b, c); 200 µm (e).
Figure 8 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 8 Drawing of anterior end of Prosphaerosyllis modinouae sp. nov. in dorsal view (a) and detail of palps (b).
Figure 14 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 14 Apistobranchus jasoni sp. nov. Illustrations of holotype (NHM.2018.12712) a anterior end in dorsal view b anterior end in lateral view and c detail of chaetigers 4 to 10 (numbered). Scale bar: 1 mm.
Figure 22 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 22 Aphelochaeta cf. longisetosa Falkland Islands specimen – MGSP plate a ventrolateral view of anterior end b dorsal view of anterior end.
Figure 1 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 1 Map showing exploratory oil field (Sea Lion) in North Falklands Basin and exploratory oil wells in East Falklands Basin from which samples in this study were collected.
Figure 5 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 5 Prosphaerosyllis modinouae sp. nov. (paratype, NHM.2018.24386) a complete specimen in dorsal view b detail of anterior end in dorsal view c detail of prostomium and palps in dorsal view d detail of eyes e anterior dorsal cirrus f posterior dorsal cirrus g posterior parapodium (arrow marking acicula) h detail of acicula. Scale bars: 1000 µm (a); 100 µm (b, c); 25 µm (e, f); 50 µm (g).
Figure 19 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 19 Comparison of Leitoscoloplos olei sp. nov. and L. kerguelensisaL. olei sp. nov., holotype (NHM.2018.21756) in lateral view b comparison of L. olei sp. nov. and one of the syntypes (BMNH.ZK.1885.12.1.252) of L. kerguelensis, both specimens in lateral view. Scale bars: 1mm.
Figure 6 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 6 Prosphaerosyllis modinouae sp. nov. (holotype, NHM.2018.25100; specimen Shirla-stained) a complete specimen in dorsal view b pattern of dorsal body papillae (= darkly stained dots) in anterior end c pattern of dorsal body papillae (= darkly stained dots) in mid-body segments d pattern of ventral papillae (= darkly stained dots). Scale bars: 500 µm (a); 200 µm (b, d).
Figure 25 from: Neal L, Paterson GLJ, Blockley D, Scott B, Sherlock E, Huque C, Glover AG (2020) Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration. ZooKeys 938: 1-86. https://doi.org/10.3897/zookeys.938.49349
Figure 25 Dodecaceria saeria sp. nov. (holotype NHM.2018.23622) a general views of anterior and posterior ends of worm b close-up of anterior c pygidium d chaetae of mid-body chaetiger e tube.
Heatwave tolerance of a marine polychaete (Hediste diversicolor): physiological and molecular data archive
<p>The aim of this work was to test the effect of long-lasting heatwaves on the intertidal polychaete <em>Hediste diversicolor</em> (24 ºC <em>vs</em> 30 ºC for a month). We analysed the whole-body proteome and carried out fatty acid analysis after 28 days of exposure and then estimated cumulative survival and upper thermal tolerance limits (after 30 days of exposure). Worms' wet weight was also compared between temperatures (after 30 days) to understand if elevated temperature has effects on growth. </p> <p>NOTE: The associated mass spectrometry proteomics dataset has been deposited to the ProteomeXchange Consortium via the PRIDE partner repository with the dataset identifier PXD020635</p> <p>Dataset associated to the paper DOI:<a href="https://doi.org/10.1016/j.envres.2021.110885">10.1016/j.envres.2021.110885</a></p>
Oxygen-mediated plasticity confers hypoxia tolerance in a corallivorous polychaete
<p><span>There is mounting evidence that the deoxygenation of coastal marine ecosystems has been underestimated, particularly in the tropics. These physical conditions appear to have far-reaching consequences for marine communities, and have been associated with mass mortalities. Yet little is known about hypoxia in tropical habitats or about the effects it has on reef-associated benthic organisms. We explored patterns of dissolved oxygen (DO) throughout Almirante Bay, Panama and found a hypoxic gradient, with areas closest to the mainland having the largest diel variation in DO, as well as more frequent persistent hypoxia. We then designed a laboratory experiment replicating the most extreme <i>in situ</i> DO regime found on shallow patch reefs (3 m) to assess the response of the corallivorous fireworm, <i>Hermodice carnaculata</i> to hypoxia. Worms were exposed to hypoxic conditions (8 h ~ 1 mg l<sup>-1 </sup>or 3.2 kPa) 16 times over an 8-week period, and at 4 and 8 weeks their oxygen consumption (respiration rates) were measured upon reoxygenation, along with regrowth of severed gills. Exposure to low DO resulted in worms regenerating significantly larger gills compared to worms under normoxia. This response to low DO was coupled with an ability to maintain elevated oxygen consumption/respiration rates after low DO exposure. In contrast, worms from the normoxic treatment had significantly depressed respiration rates after being exposed to low DO (week 8). This indicates that oxygen-mediated plasticity in both gill morphology and physiology may confer tolerance to increasingly frequent and severe hypoxia in one important coral predator associated with reef decline. </span></p>
Figure 9 from: Azmi SS, Ibrahim YS, Angsupanich S, Sumpuntarat P, Sato M (2021) Epitokous metamorphosis, reproductive swimming, and early development of the estuarine polychaete, Neanthes glandicincta Southern, 1921 (Annelida, Nereididae) on the east coast of the Malay Peninsula. ZooKeys 1011: 1-24. https://doi.org/10.3897/zookeys.1011.59780
Figure 9 Early development of Neanthes glandicincta (Southern, 1921) after fertilisation in the laboratory. The material from the Lower Songkhla Lagoon, Thailand A fertilised egg surrounded by a jelly layer (j), 10 min after fertilisation; many sperm were trapped in the jelly layer; lipid (oil) drops (o) surrounded the germinal vesicle B 4-cell stage, 1 h and 10 min after fertilisation C early trochophore stage, 7 h and 30 min after fertilisation; ciliary movement of the prototroch (p) began within the jelly layer D free-swimming trochophore larva just after hatching out of the jelly layer, 8 h after fertilisation; ciliary bands of the prototroch and telotroch (t) were present E free-swimming early-metatrochophore larva, 20 h after fertilisation; two pairs of chaetal tufts (c) were present F free-swimming 2-chaetiger late-metatrochophore larva, 21 h after fertilisation; two pairs of chaetal tufts well developed G free-swimming early 3-chaetiger nectochaeta larva, 22 h after fertilisation; three pairs of chaetal tufts were developed; the prototroch and lipid drops remained in the anterior body H demersal late 3-chaetiger nectochaeta larva, 48 h after fertilisation; a pair of eyes (e), antennae (a), and anal cirri (ac) appeared. Lipid drops disappeared. Scale bars: 0.2 mm.
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OpenNeuro
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