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571 results for “Hydrothermal vents”
FIGURE 10b in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 10b. Ratios of peduncle to capitulum length. Ratios of peduncle to capitulum lengths for the "robust" variety only. The extrapolation shown is a power regression, demonstrating that there is almost no correlation between growth and the ratio between peduncle and capitulum length. Data extracted from Figure 10a for the 14 specimens from JC42-F0122)
FIGURE 6 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 6. Vulcanolepas scotiaensis sp. nov., external morphology. a: Capitulum (left side, exterior), "gracile" form, peduncle truncated, from JC42-F-0396; b: Capitulum (left side, exterior), more heavily sculpted "robust" form (peduncle truncated), from JC42-F-0122; c: Complete animal (left side, exterior), more heavily sculpted "robust" form, showing a capitulum that is slightly longer than the peduncle, from JC42-F-0122; d: Complete animal (left side, exterior), "gracile" form, from JC42-F-0396; e: Complete animal (left side, exterior), "gracile" form (juvenile), from JC42-F-0396; f: Complete animal (right side, exterior), "gracile" form (adult) showing a peduncle that is at least ten times the length of the capitulum, from JC42-F-0396.
FIGURE 11 in Vulcanolepas scotiaensis sp. nov., a new deep-sea scalpelliform barnacle (Eolepadidae: Neolepadinae) from hydrothermal vents in the Scotia Sea, Antarctica
FIGURE 11. Benthic Ecology: The V. scotiaensis sp. nov. assemblage at the "Carwash" vent chimney in the E9 vent field (60°02.809S, 29°58904W), East Scotia Ridge Back-Arc Basin. a: Photograph DSCN9734, showing V. scotiaensis sp. nov. as the dominant organism living at this site. a specimen of the decapod Kiwa (arrowed) may be seen above and slightly to the right of the letter 'a'; a larger, pink anemone, Pacmanactis sp. (arrowed), is on the left margin. Image taken by the Scorpio stills camera on Isis, Dive 138. b: Photograph DSCN0191, showing detail of V. scotiaensis sp. nov. in feeding mode with extended, delicate, filamentous cirri. A specimen of the limpet Lepetodrilus sp. was grazing on the exterior of one of the larger peduncles (arrowed). Image taken by the Scorpio stills camera on Isis, Dive 140. Only the 'gracile variety' of V. scotiaensis sp. nov. is present in these two photographs, both taken at circa 2400 metres, where temperatures in the barnacle assemblage zone ranges between 5 and 19°C (Marsh et al., 2012). Scale: diameter of largest peduncle (arrowed) circa 6mm.
FIGURE 3 in New records of Serpulidae (Annelida, Polychaeta) from hydrothermal vents of North Fiji, Pacific Ocean
FIGURE 3. Live photos (A-B, photo G.W. Rouse) and SEM micrographs (C–G) of chaetae of Protis sp. from "Jason- 2"submersible dive # 150. A—view of live animal, B—the same, close-up of the thorax, C—collar chaetae, D— Apomatus chaetae of the 5th thoracic chaetigerous segment, E—chaeta of 11th abdominal segment, F—uncini of 3rd thoracic segment, G —uncini of 10th abdominal segment. Scale. A, B—1 mm, C, D—10 µm, E—5 µm, F, G—10 µm.
FIGURE 2 in New records of Serpulidae (Annelida, Polychaeta) from hydrothermal vents of North Fiji, Pacific Ocean
FIGURE 2. Live photos of Hyalopomatus mironovi from "Jason-2" dive # 149. A—operculum of the animal inside the tube, B—anterior end of the worm removed from the tube, C—view of the thorax showing the development of the thoracic membranes. (photo G.W. Rouse). Scale. A–C—1 mm.
FIGURE 4 in New records of Serpulidae (Annelida, Polychaeta) from hydrothermal vents of North Fiji, Pacific Ocean
FIGURE 4. Maximum parsimony jackknife majority-rule consensus tree; numbers for support of relevant nodes are jackknife values (only jac> 60 shown) from the MP analysis based on 2000 replicates.
Figure 1. A in Geochemistry drives the allometric growth of the hydrothermal vent tubeworm Riftia pachyptila (Annelida: Siboglinidae)
Figure 1. A, map showing the position of the vents investigated in this study. For details on each sampling stations see Table 1. B, C, the hydrothermal landscapes in the sediment-hosted hydrothermal vents on the Guaymas Basin (27 °N EPR). D–F, basalt-hosted hydrothermal vents in the 21 °N EPR and 9 °N EPR fields. Photo taken using DSRV "Mir" camera.
FIGURE 3 in Molecular phylogenetic analysis of a known and a new hydrothermal vent octopod: their relationships with the genus Benthoctopus (Cephalopoda: Octopodidae)
FIGURE 3. Maximum likelihood tree depicting the phylogenetic relationship of 14 species (15 individuals) of Octopodidae. The analysis employed a portion of the mitochondrial gene, 12S rDNA. Bayesian posterior probability support values are indicated below the nodes and maximum likelihood bootstrap values with 50% support or greater are indicated above the nodes.
FIGURE 2 in Molecular phylogenetic analysis of a known and a new hydrothermal vent octopod: their relationships with the genus Benthoctopus (Cephalopoda: Octopodidae)
FIGURE 2. Maximum likelihood tree depicting the phylogenetic relationship of 13 species (14 individuals) of Octopodidae. The analysis employed a portion of four mitochondrial genes (12S rDNA, 16S rDNA, COIII, cyt b) and a portion of the nuclear gene rhodopsin. Bayesian posterior probability support values are indicated below the nodes and maximum likelihood bootstrap values with 50% support or greater are indicated above the nodes.
FIGURE 1 in Molecular phylogenetic analysis of a known and a new hydrothermal vent octopod: their relationships with the genus Benthoctopus (Cephalopoda: Octopodidae)
FIGURE 1. The Manus Vent octopus specimen (FMNH 310455) in situ near a hydrothermal vent in the Manus Basin off Papua New Guinea, 1500 m depth.
Figure 8 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 8. Scatter plot of shell diameter vs. shell height across a size range of 100 specimens: A, Gigantopelta chessoia sp. nov. (line of best fit formula: y = 0.9045x −0.6278, R2 = 0.99); B, Gigantopelta aegis sp. nov. (line of best fit formula: y = 0.8823x −0.8362, R2 = 0.99).
Figure 2 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 2. In-situ aggregations of the two new species of Gigantopelta gen. nov.: A, Gigantopelta chessoia sp. nov. at E2 segment, East Scotia Ridge; B, Gigantopelta aegis sp. nov. at Longqi vent field, South West Indian Ridge. Scale bars = 5 cm.
Figure 5 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 5. Protoconchs: A, Gigantopelta chessoia sp. nov., scale bar = 100 μm; B, Gigantopelta aegis sp. nov., scale bar = 100 μm. Juvenile operculum: C, G. chessoia sp. nov., scale bar = 500 μm; D, G. aegis sp. nov., scale bar = 500 μm.
Figure 1 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 1. Map of deep-sea hydrothermal vent fields where Gigantopelta chessoia sp. nov. and Gigantopelta aegis sp. nov. are known to occur. This map was created using ESRI ArcMap 10.1 (ESRI 2012) and General Bathymetric Chart of the Oceans (GEBCO) Grid Display v. 2.13 (BODC 2010). Data sources: bathymetry, GEBCO; continents data, ArcWorld Supplement; oceanic ridges, United States Geologic Service. Abbreviations: A-AR, American−Antarctic Ridge; CIR, Central Indian Ridge; ESR, East Scotia Ridge; MAR, Mid Atlantic Ridge; SEIR, South East Indian Ridge; SWIR, South West Indian Ridge.
Figure 10. Haplotype parsimonious networks constructed from cytochrome c oxidase subunit I in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 10. Haplotype parsimonious networks constructed from cytochrome c oxidase subunit I sequences of 30 specimens of: A, Gigantopelta chessoia sp. nov.; B, Gigantopelta aegis sp. nov. Open circles are represented haplotypes, number inside the circles and sizes of the circles correspond to number of individuals sharing the haplotype. Filled circles are hypothesized intermediate haplotypes that are not represented by sequences.
Figure 9. Consensus tree reconstructed from a 489 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 9. Consensus tree reconstructed from a 489-bp fragment of the cytochrome c oxidase subunit I gene using Bayesian inference. Node values represent Bayesian posterior probabilities.
Figure 4. A, B in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 4. A, B, Gigantopelta chessoia sp. nov., paratype shell (NHMUK 20150067): A, aperture view; B, abaperture view. C, D, Gigantopelta aegis sp. nov., paratype shell (NHMUK 20150071): C, aperture view; D, abaperture view. Scale bars = 1 cm. Photography by Pete Bucktrout (British Antarctic Survey).
Figure 3. A−C in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 3. A−C, Gigantopelta chessoia sp. nov., holotype (NHMUK 20150066): A, aperture view; B, umbilical view; C. aperture view; D−F, Gigantopelta aegis sp. nov., holotype (NHMUK 20150070): D, aperture view; E, umbilical view; F, aperture view. Scale bars = 1 cm. Photography by Pete Bucktrout (British Antarctic Survey).
Figure 7 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 7. Illustration of soft parts with the mantle partially removed: A, Gigantopelta chessoia sp. nov.; B, Gigantopelta aegis sp. nov. Scale bars = 1 cm. Abbreviations: ct, ctnidium; dg, digestive gland; eg, oesophageal gland; et, epipodial tentacles; f, foot; gd, gonad; ll, lateral lappet; o, operculum attachment; pc, pericardium; sn, snout; t, cephalic tentacles.
Figure 6 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
Figure 6. Radula. Overview: A, Gigantopelta chessoia sp. nov.; B. Gigantopelta aegis sp. nov.; scale bars = 100 μm. Central and lateral teeth close-up: C, G. chessoia sp. nov.; D, G. aegis sp. nov.; scale bars = 20 μm. Marginal teeth close-up: E, G. chessoia sp. nov.; F. G. aegis sp. nov.; scale bars = 10 μm.
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