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571 results for “Hydrothermal vents”
FIGURE 8. Turneroconcha magnifica n in A new genus Turneroconcha (Bivalvia: Vesicomyidae: Pliocardiinae) for the giant hydrothermal vent clam 'Calyptogena' magnifica
FIGURE 8. Turneroconcha magnifica n. comb. (Boss & Turner, 1980), scanning electron micrographs of anatomical details, RV Western Flyer, dive D 754, L=36 mm (IORAS, BIV00036-2). A, posterior part of body, black rectangles indicate locations of anatomical details shown in the following images. B, dorsal thickening of the mantle margins above exhalant siphon with three rows of tentacles. C, tentacles between siphons. D, margin of exhalant siphon from inside. E, tentacles of exhalant siphon margin. F, cross section of ventral wall of inhalant siphon. G, plicated epithelium of ventral wall of inhalant siphon. H, inhalant siphon from inside. I, inner valve of inhalant siphon from inside. J, tentacles of inhalant siphon margin. K, mantle inner fold 2 from the basis of inhalant siphon. L, ciliary tufts from inner mantle wall near siphon basis. M, tentacle of exhalant siphon. N, tentacle of inhalant siphon. ci, cilia; ct, ciliary tufts; fes, inner flap of exhalant siphon; imf2, inner mantle fold 2; lm, pallial longitudinal muscle; m, muscle bands; ple, plicated epithelium; vis, inner valve of inhalant siphon. Scale bars: A, 5 mm; B–D, I, 200 µm; E–J, K, 100 µm; G, 50 µm; H, 500 µm; L–N, 10 µm.
FIGURE 6. Turneroconcha magnifica n in A new genus Turneroconcha (Bivalvia: Vesicomyidae: Pliocardiinae) for the giant hydrothermal vent clam 'Calyptogena' magnifica
FIGURE 6. Turneroconcha magnifica n. comb. (Boss & Turner, 1980), RV Western Flyer, dive D752, L=104 mm (IORAS, BIV00038-2). A, body as seen from left, gills and part of visceral mass removed. B, anterior part of body, gills intact. C, posterior part of body. D, posterior part of body, left wall of siphons removed. aa, anterior adductor muscle; alid, ascending lamella of inner demibranch; alod, ascending lamella of outer demibranch; alp, anterior labial palps; ap, anal papilla; apr, anterior pedal retractor muscle; au, auricle; dg, digestive gland; dlid, descending lamella of inner demibranch; es, exhalant siphon; fes, inner flap of exhalant siphon; fg, food groove; g, gonad; imf1, inner mantle fold 1; imf2, inner mantle fold 2; is, inhalant siphon; lm, pallial longitudinal muscle; mg, midgut; mvt, mantle thickening covered by ciliated epithelium; pa, posterior adductor muscle; ppr, posterior pedal retractor muscle; st, stomach; t, tentacles of mantle margin between siphons; timf3, tentacles of inner mantle fold 3; v, ventricle; vis, inner valve of inhalant siphon.
FIGURE 2. Turneroconcha magnifica n in A new genus Turneroconcha (Bivalvia: Vesicomyidae: Pliocardiinae) for the giant hydrothermal vent clam 'Calyptogena' magnifica
FIGURE 2. Turneroconcha magnifica n. comb. (Boss & Turner, 1980), RV Western Flyer, dive D 754, L=93 mm (IORAS, BIV00036-1). A, exterior of left valve. B, interior of left valve. C, exterior of right valve. D, interior of right valve. E, left hinge plate. F, right hinge plate. G, hinge margin of both valves. H, dorsal view. I, interior of right valve, pallial scars highlighted. J, anterior view. K, ventral view. 1, ventral cardinal tooth; 2a, anterior ramus of subumbonal cardinal tooth; 2b, posterior ramus of subumbonal cardinal tooth; 3b, posterior ramus of subumbonal cardinal; 4b, reduced posterodorsal cardinal tooth; all, anterior lamellar ligament layer; F, fibrous ligament layer; ppl, posterior part of posterior lamellar ligament layer; ny, nymph, tl, trace of posterior part of anterior lamellar ligament layer.
FIGURE 14 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 14. SEM of Laminatubus joycebrooksae n. sp. (SIO-BIC A8256A). A—lateral view of a specimen without radiolar crown. B—close-up view of the thorax. C—collar chaetae. D—thoracic chaetae of the last thoracic chaetigerous segment. E—thoracic uncini. F—anterior abdominal true trumpet-shaped chaeta. G—anterior abdominal uncini.
FIGURE 13 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 13. Photos of Laminatubus joycebrooksae n. sp. A, B, C—SIO-BIC A1315, Alvin dive 4501, Mound 12, Costa Rica, 1008 m. D—SIO-BIC A8255, Mound 12, Costa Rica, 1001 m. E– eggs released by the animal.
FIGURE 12 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 12. Photos of Laminatubus joycebrooksae n. sp. A–C—animals in situ, Alvin dive 4501, Mound 12, Costa Rica, 1008 m; D—close-up views of tubes, Alvin dive 4502, Mound 12, Costa Rica, 1000 m. Photo credit: HOV Alvin, Woods Hole Oceanographic Institute.
FIGURE 10 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 10. Photos of Laminatubus paulbrooksi n. sp. A–C—SIO-BIC A11567, A11568, A11569, Guaymas Basin, 1565 m; A—specimen in tube; B—ventro-lateral view of the thorax, C—close-up view of the operculum. D—specimen in tube, Alvin dive 4509, Jaco Scar, Costa Rica, 1866 m.
FIGURE 11 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 11. SEM of Laminatubus paulbrooksi n. sp. (SIO-BIC A1586). A—lateral view of a specimen with radiolar crown. B—close-up view of the thorax. C—collar chaetae. D—close-up view of collar chaetae. E—thoracic chaetae. F—thoracic uncini. G—close-up view of anterior abdominal true trumpet-shaped chaeta. H—anterior abdominal uncini.
FIGURE 9 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 9. Photos of Laminatubus paulbrooksi n. sp. in situ. At Jaco Scar, Costa Rica. Photo credit: ROV SuBastian, Schmidt Ocean Institute.
FIGURE 8 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 8. SEM of Laminatubus alvini AM W.38421 body and chaetae. A—lateral view of thorax, B– collar chaetae, C—ventral view of thorax, D—chaetae of the second thoracic chaetiger, E—anterior abdominal chaetae, details of hollow tip, F—anterior thoracic uncini, G—anterior abdominal uncini.
FIGURE 7 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 7. Photos of Laminatubus alvini specimens, Alvin dive 4094. A, B—variability of opercula, C—view of the thorax showing insertion of peduncle, D—dorsal view of an entire specimen removed from tube, E—lateral view of thorax.
FIGURE 5 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 5. Plot using ABGD (Puillandre et al. 2012) of pairwise distances across all Laminatubus joycebrooksae n. sp. and L. paulbrooksi n. sp. CytB sequences using the Kimura (K80) model. There is a clear 'barcode' gap between L. joycebrooksae n. sp. and L. paulbrooksi n. sp. with the latter taxon showing a high level of intraspecific variation. Uncorrected pairwise distances gave a similar distribution.
FIGURE 4. Combined haplotype networks from CytB data for Laminatubus paulbrooksi n in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 4. Combined haplotype networks from CytB data for Laminatubus paulbrooksi n. sp. (top) from Pacific Costa Rica margin and Gulf of California (Mexico) localities and L. joycebrooksae n. sp. (bottom) from Costa Rica. There was little variability among the L. joycebrooksae n. sp. sequences and a distinct break to L. paulbrooksi n. sp. This corresponds to a minimum 6.4% uncorrected distance. Laminatubus paulbrooksi n. sp. showed marked intraspecific variability with distinct breaks among the three main sites; Costa Rica (9°N), Pescadero (23°N) and Guaymas Basin (27°N). * indicates the holotypes for L. paulbrooksi n. sp. and L. joycebrooksae n. sp. respectively.
FIGURE 3 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 3. Haplotype networks from CytB data for Laminatubus alvini from an extensive section of the East Pacific Rise from 23°N to 38°S, over 7000 km. Only two haplotypes were found.
FIGURE 2 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 2. Maximum likelihood (ML) tree from the analysis of the combined sequences from CytB, 18S, and Histone H3. Numbers on nodes are those bootstrap scores above 50%. * indicates the holotypes for L. paulbrooksi n. sp. and L. joycebrooksae n. sp. respectively.
FIGURE 1 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 1. Distribution of Laminatubus spp. in East Pacific. Black square (L. alvini), white circles (L. paulbrooksi n. sp.) and grey triangle (L. joycebrooksae n. sp.). A black diamond is the type locality of L. alvini on the Galapagos Rift.
Data from: Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents
Background: Chemolithoautotrophic primary production sustains dense invertebrate communities at deep-sea hydrothermal vents and hydrocarbon seeps. Symbiotic bacteria that oxidize dissolved sulfur, methane, and hydrogen gases nourish bathymodiolin mussels that thrive in these environments worldwide. The mussel symbionts are newly acquired in each generation via infection by free-living forms. This study examined geographical subdivision of the thiotrophic endosymbionts hosted by Bathymodiolus mussels living along the eastern Pacific hydrothermal vents. High-throughput sequencing data of 16S ribosomal RNA encoding gene and fragments of six protein-coding genes of symbionts were examined in the samples collected from nine vent localities at the East Pacific Rise, Galápagos Rift, and Pacific-Antarctic Ridge. Results: Both of the parapatric sister-species, B. thermophilus and B. antarcticus, hosted the same numerically dominant phylotype of thiotrophic Gammaproteobacteria. However, sequences from six protein-coding genes revealed highly divergent symbiont lineages living north and south of the Easter Microplate and hosted by these two Bathymodiolus mussel species. High heterogeneity of symbiont haplotypes among host individuals sampled from the same location suggested that stochasticity associated with initial infections was amplified as symbionts proliferated within the host individuals. The mussel species presently contact one another and hybridize along the Easter Microplate, but the northern and southern symbionts appear to be completely isolated. Vicariance associated with orogeny of the Easter Microplate region, 2.5–5.3 million years ago, may have initiated isolation of the symbiont and host populations. Estimates of synonymous substitution rates for the protein-coding bacterial genes examined in this study were 0.77–1.62%/nucleotide/million years. Conclusions: Our present study reports the most comprehensive population genetic analyses of the chemosynthetic endosymbiotic bacteria based on high-throughput genetic data and extensive geographical sampling to date, and demonstrates the role of the geographical features, the Easter Microplate and geographical distance, in the intraspecific divergence of this bacterial species along the mid-ocean ridge axes in the eastern Pacific. Altogether, our results provide insights into extrinsic and intrinsic factors affecting the dispersal and evolution of chemosynthetic symbiotic partners in the hydrothermal vents along the eastern Pacific Ocean.
FIGURE 5 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 5. Archiconchoecia chavturi, new species, adult female, holotype: A, right mandible, mv; B, endopod left mandible, lv; C, part basis and endopod left mandible, lv; D, part coxa and basis right mandible, mv; E, coxa endite right mandible as seen through basis (indistinct), lv. (lv = lateral view; mv = medial view.)
FIGURE 8 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 8. Archiconchoecia chavturi, new species, adult female, holotype: eggs and spermatheca on lower right and detail of spermatheca showing threadlike sperm on upper left.
FIGURE 12 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 12. Polycopetta pax, new species, adult female, holotype: A, left maxilla, lv (nabs); B, right maxilla drawn on body, lv (nabs); C, exopod right maxilla, lv; D, precoxal endite I of maxilla, anterior to left; E, 5th limb. (lv = lateral view; nabs = not all bristles shown.)
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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