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571 results for “Hydrothermal vents”
Fig. 2 a –d in 3D-microanatomy and histology of the hydrothermal vent gastropod Lurifax vitreus Warén & Bouchet, 2001 (Heterobranchia: Orbitestellidae) and comparisons with Ectobranchia
Fig. 2 a –d Mantle cavity development to posterior. a 3Dreconstruction of mantle cavity and surrounding organs. b Anterior part of mantle cavity. c middle part of mantle cavity. d posterior part of mantle cavity. at atrium. cf Ventral ciliated fold, cr dorsal ciliated ridge, e eye, gd gonoduct (for separation of the different gland epithelia see Fig. 4), ge granular epithelium, k kidney, mc mantle cavity, oe oesophagus, pc pericard, ph pharynx, pmg pigmented mantle gland, ppg posterior pedal gland, r radula, re rectum, sg salivary glands, st stomach, ve ventricle, vn visceral nerve
Fig. 3 Neochromadora aff. poecilosoma, a in Nematode succession at deep-sea hydrothermal vents after a recent volcanic eruption with the description of two dominant species
Fig. 3 Neochromadora aff. poecilosoma, a female, specimen no.7, reproductive system; b female, no. 7 total view; c male, no. 1, cuticle on the level of the pharynx; d male, no. 1, cuticle on the level of the midbody; e male, no.1, cuticle on the level of the tail. Scale in μm
Fig. 2 Neochromadora aff. poecilosoma, a in Nematode succession at deep-sea hydrothermal vents after a recent volcanic eruption with the description of two dominant species
Fig. 2 Neochromadora aff. poecilosoma, a male, specimen no.1, head region; b male, specimen no. 2; c male, no.1, anterior end; d female, specimen no. 6; e male, no. 1, posterior end; f male, no.1, spicule. Scale in μm
Fig. 1 in Nematode succession at deep-sea hydrothermal vents after a recent volcanic eruption with the description of two dominant species
Fig. 1 Examples of habitat types analyzed in this study. a Newly established active vent site colonized by the tubeworm foundation species Tevnia jerichonana and a few large Riftia pachyptila tubeworms at P-Vent in 2007. b Old inactive vent at the site East Wall showing empty tubeworm tubes and mussel shells in 2007. c Newly bare basalt adjacent to the vent site Tica in 2007. In each habitat artificial settlement devices (referred to as "sponge;" see Fig. 1c) were deployed
Figure 6 in Diversity and biogeography of scale worms in the subfamily Lepidonotopodinae (Annelida: Polynoidae) from Indian Ocean hydrothermal vents with descriptions of four new species
Figure 6. Phylogenetic reconstruction from the combined analysis using six genes (COI, 16S, 18S, 28S, Cytb, and H3). Numbers next to nodes are ML bootstrap percent/ Bayesian inference (BI) posterior probability. Abbreviations: * indicates 95% ultrafast bootstrap or greater and 0.95 posterior probability or greater; ~ indicates nodes not found; red marks the Indian Ocean, CIR = Central Indian Ridge, CR = Carlsberg Ridge, SWIR = South-West Indian Ridge.
Figure 3 in Diversity and biogeography of scale worms in the subfamily Lepidonotopodinae (Annelida: Polynoidae) from Indian Ocean hydrothermal vents with descriptions of four new species
Figure 3. Levensteiniella longqiensis sp. nov. Holotype RSIO35287 in dorsal (A) and ventral views (B); head and anterior segments of paratype RSIO35289 in dorsal (C) and ventral views (D); E, anterior view of segment 9 on paratype RSIO35289; F, posterior view of segment 13 on holotype RSIO35287; G, notochaetae on segment 9 on paratype RSIO35289; H, neurochaetae of segment 13 on holotype RSIO35287. Scale bars: A, B = 1 mm, C = 0.25 mm, D = 0.2 mm, E = 0.5 mm, F = 250 μm, H = 25 μm.
Figure 1 in Diversity and biogeography of scale worms in the subfamily Lepidonotopodinae (Annelida: Polynoidae) from Indian Ocean hydrothermal vents with descriptions of four new species
Figure 1. Map showing the locations of relevant deep-sea hydrothermal vents in the Indian Ocean. The map was generated by Generic Mapping Tools (GMT) (Wessel et al. 2019), CIR = Central Indian Ridge, CR = Carlsberg Ridge, SWIR = Southwest Indian Ridge.
Figure 5 in Diversity and biogeography of scale worms in the subfamily Lepidonotopodinae (Annelida: Polynoidae) from Indian Ocean hydrothermal vents with descriptions of four new species
Figure 5. Branchinotogluma jiaolongae sp. nov. Holotype (RSIO35218, female) in dorsal (A) and ventral views (B); C, right elytron from segment 5 of paratype RSIO35215 in dorsal view; branchiae and segments 1 and 14 in dorsal (D) view of holotype RSIO35218; head and anterior segment of paratype RSIO38118 in dorsal view (E) and ventral view (F). G, anterior view and dorsal view of pharynx with papillae indicated by white arrows on paratype RSIO38128; posterior segments on paratype RSIO35215 in dorsal view (H) and ventral view (J). I, ventral papillae on segments 12–15 of paratype RSIO35215.Posterior view (upper position) and anterior view (lower position) of right parapodia on segments 3 (K) and 9 (L) of holotype RSIO35218. M, left parapodia on segment 20 of paratype RSIO35215 in anterior view (upper position) and posterior view (lower position). N–R, holotype RSIO35218. N, posterior view of right parapodia on segment 9; O, notochaetae on segment 3 of holotype; P, tips of supracicular neurochaetae of segment 9 of holotype; Q, tips of subacicular neurochaetae on segment 9 with details of tips of supraacicular neurochaetae of holotype; R, upper subacicular neurochaetae on segment 3 of holotype. Scale bars: A, B = 2mm, C, D, F, H = 1mm, K, L = 0.5mm, E, G, M = 0.2mm, I, J = 0.5mm, N = 0.6mm, O = 20 μm, P = 25 μm, Q = 10 μm, 2μm in small window, R = 4 μm.
Figure 4 in Diversity and biogeography of scale worms in the subfamily Lepidonotopodinae (Annelida: Polynoidae) from Indian Ocean hydrothermal vents with descriptions of four new species
Figure 4. Branchinotogluma kaireiensis sp. nov. Holotype (NSMT-Pol_1624, female) in dorsal (A) and ventral views (B); right elytron from segment 7 of holotype (NSMT-Pol_1624, female) in dorsal (C) view; branchiae and segments 18 and 19 in dorsal (D) view of holotype NSMT-Pol_1624; head and tentacular segment of paratype (NSMT-Pol_1623, male) in dorsal (E) view; head and anterior segment of holotype NSMT-Pol_1624 in ventral (F) view; anterior view (G) of dissected pharynx with papillae marked by red arrows of paratype NSMT-Pol_1623; dorsal view (H) of posterior segments on holotype NSMT-Pol_1624; posterior segments on paratype NSMT-Pol_1623 in ventral view (I); ventral papillae on segment 13–16 of paratype NSMT-Pol_1623 in ventral (J) view. Posterior view (upper position) and anterior view (lower position) of right parapodia on segments 2 (K) and 5 (L) of holotype NSMT-Pol_1624; M, left parapodia from segment 16 of holotype NSMT-Pol_1624 in anterior view (upper position) and in posterior view (lower position); posterior view (upper position) and anterior view (lower position) of right parapodia on segment 21(N) of paratype NSMTPol_1623. O–Q, holotype NSMT-Pol_1624. O, notochaetae of segment 16 on the left; P, supraacicular neurochaetae of segment 5 on the right; Q, upper subacicular neurochaetae of segment 16 on the left. R, lower subacicular neurochaetae of segment 21 on the right of paratype NSMT-Pol_1623. Scale bars: A, B = 1cm, C, D, G, H, I = 1mm, E = 0.5mm, F = 2mm, J = 1.5mm; K, L, M = 1.5 mm, N = 1.0 mm, O = 100 μm, P, Q, R = 10 μm.
FIGURE 6 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 6. Relationship of analyzed Lebbeus species inferred with nucleotide sequences of the cytochrome c oxidase subunit I (COI) gene using the maximum likelihood (ML) method. Black dots indicate strongly supported nodes where bootstrap support values were greater than 90%, with the support value indicated next to each node. Numbers behind each species/clade name indicate [number of analysed sequences in that species/clade], range of K2P genetic distance from all other species/clades, and the K2P genetic distance within the same species/clade where multiple sequences were available.
FIGURE 4 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 4. Lebbeus parvirostris sp. nov., holotype, female (cl 7.4 mm), CBM-ZC 17848. A, carpus and chela of right first pereopod; B–D, distal parts of propodi and dactyli of third to fifth pereopods (left third, right fourth and fifth); C,
FIGURE 5 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 5. Lebbeus parvirostris sp. nov., habitus in lateral view of a specimen photographed on-board R/V Yokosuka, showing the living colouration.
FIGURE 1 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 1. Lebbeus parvirostris sp. nov., holotype, female (cl 7.4 mm), CBM-ZC 17848, habitus in lateral view (left first pereopod missing, pleon partially damaged).
FIGURE 2 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 2. Lebbeus parvirostris sp. nov. A–F, holotype, female (cl 7.4 mm), CBM-ZC 17848; G, paratype, female (cl 4.6 mm), CBM-ZC 17849. A, anterior part of carapace and cephalic appendages, left lateral view (antennal flagellum omitted); B, same, dorsal view (antennular flagella partially omitted); C, fourth and fifth pleomeres, right lateral view; D, telson and left uropod, dorsal view (setae on uropodal rami omitted); E, posterior margin of telson, dorsal view; F, left antennal scaphocerite, ventral view (marginal setae omitted); G, fourth and fifth pleomeres, left lateral view.
FIGURE 7 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 7. Relationship of analyzed Lebbeus species inferred with nucleotide sequences of the 16S rRNA gene using the maximum likelihood (ML) method. Bootstrap values of greater than 90% are indicated for relevant nodes. Numbers behind each species name indicate [number of analysed sequences in that species], range of K2P genetic distance from all other species, and the K2P genetic distance within the same species where multiple sequences were available.
FIGURE 3 in A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan
FIGURE 3. Lebbeus parvirostris sp. nov., holotype, female (cl 7.4 mm), CBM-ZC 17848. A, left third maxilliped, lateral view; B, distal part of ultimate article of left third maxilliped, dorsal view; C, right first pereopod, lateral view; D, same, close up of proximal part of ventral margin of merus; E, ungues of fingers of first pereopod; F, left second pereopod, lateral view; G, right second pereopod, lateral view; H, left third pereopod, lateral view; I, right fourth pereopod, lateral view; J, right fifth pereopod, lateral view.
Data from: A molecular gut content study of Themisto abyssorum (Amphipoda) from Arctic hydrothermal vent and cold seep systems
The use of DNA as a marker for prey inside the gut of predators has been instrumental in further understanding of known and unknown interactions. Molecular approaches are in particular useful in unavailable environments like the deep-sea. Trophic interactions in the deep-sea are difficult to observe in situ, correct deep-sea experimental laboratory conditions are difficult to obtain, animals rarely survive the sampling, or the study organisms feed during the sampling due to long hauls. Preliminary studies of vent and seep systems in the Nordic Seas have identified the temperate-cold water pelagic amphipod Themisto abyssorum as a potentially important predator these chemosynthetic habitats. However, the prey of this deep-sea predator is poorly known, and we applied Denaturing High Performance Liquid Chromatography (DHPLC) to investigate the predator - prey interactions of T. abyssorum in deep-water vent and seep systems. Two deep-water hydrothermally active localities (The Jan Mayen and Loki's Castle vent fields) and one cold seep locality (The Håkon Mosby mud volcano) in the Nordic Seas were sampled, genomic DNA of the stomachs of T. abyssorum was extracted, and 18S rDNA gene was amplified and used to map the stomach content. We found a wide range of organisms including micro-eukaryotes, metazoans and detritus. Themisto abyssorum specimens from Loki's Castle had the highest diversity of prey. The wide range of prey items found suggests that T. abyssorum might be involved in more than one trophic level and should be regarded as an omnivore and not a strict carnivore as have previously been suggested.
Data from: Free-living bacterial communities associated with tubeworm (Ridgeia piscesae) aggregations in contrasting diffuse flow hydrothermal vent habitats at the Main Endeavour Field, Juan de Fuca Ridge
We systematically studied free-living bacterial diversity within aggregations of the vestimentiferan tubeworm Ridgeia piscesae sampled from two contrasting flow regimes (High Flow and Low Flow) in the Endeavour Hydrothermal Vents Marine Protected Area (MPA) on the Juan de Fuca Ridge (Northeast Pacific). Eight samples of particulate detritus were recovered from paired tubeworm grabs from four vent sites. Most sequences (454 tag and Sanger methods) were affiliated to the Epsilonproteobacteria, and the sulfur-oxidizing genus Sulfurovum was dominant in all samples. Gammaproteobacteria were also detected, mainly in Low Flow sequence libraries, and were affiliated with known methanotrophs and decomposers. The cooccurrence of sulfur reducers from the Deltaproteobac- teria and the Epsilonproteobacteria suggests internal sulfur cycling within these habitats. Other phyla detected included Bacteroidetes, Actinobacteria, Chloroflexi, Firmicutes, Planctomycetes, Verrucomicrobia, and Deinococcus–Thermus. Statisti- cally significant relationships between sequence library composition and habitat type suggest a predictable pattern for High Flow and Low Flow environments. Most sequences significantly more represented in High Flow libraries were related to sulfur and hydrogen oxidizers, while mainly heterotrophic groups were more represented in Low Flow libraries. Differences in temperature, avail- able energy for metabolism, and stability between High Flow and Low Flow habitats potentially explain their distinct bacterial communities.
FIGURE 10 in Species of the genus Munidopsis (Crustacea, Decapoda, Galatheidae) from the deep Atlantic Ocean, including cold-seep and hydrothermal vent areas
FIGURE 10. Munidopsis parfaiti (Filhol, 1885), female (15.8 mm), NE Atlantic, NORATLANTE, Stn 116 B18. A, carapace and abdomen, lateral. B, same, dorsal. Scale: 4 mm.
FIGURE 5. Munidopsis exuta n in Species of the genus Munidopsis (Crustacea, Decapoda, Galatheidae) from the deep Atlantic Ocean, including cold-seep and hydrothermal vent areas
FIGURE 5. Munidopsis exuta n. sp., holotype, ovigerous female (34.7 mm), MidAtlantic Ridge, HYDROSNAKE, Stn HS08, MNHNGa 4621. A, carapace, dorsal. B, same, lateral. C, posterior part of sixth abdominal segment and telson. D, anterior part of sternal plastron. E, left antennule, antenna and ocular peduncle, ventral. F, endopod of right third maxilliped, lateral. G, right cheliped, lateral. H, right second pereiopod, lateral. I, dactylus of right second pereiopod, lateral. Scale: A–B, D–E, G. I = 5 mm, C, F, H = 2 mm.
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Allen Brain Atlas
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