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48 results for “Juan de Fuca Ridge”
FIGURE 2. Protanais ligniamator, female paratype. A in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 2. Protanais ligniamator, female paratype. A) Antennule; B) Antenna; C) Labrum; D) Left mandible; E) Right mandible; F) Left mandible, molar; G) Labium; H) Maxillule; I) Maxilla; J) Maxilliped; K) Epignath. Scale bars: 1 mm.
FIGURE 11. Armaturatanais trispinipodus, female. A in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 11. Armaturatanais trispinipodus, female. A) Holotype, lateral view; B) Antennule; C) Antenna; D) Labrum; E) Left mandible; F) Right mandible; G) Labium; H) Maxillule; I) Maxilliped; J) Cheliped. Scale bar A 1 mm, scale bars B–I 0.25 mm.
FIGURE 6. Protanais ligniamator, adult male paratype. A in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 6. Protanais ligniamator, adult male paratype. A) Cheliped; B) Pereopod 1; C) Pereopod 2; D) Pereopod 3; E) Pereopod 4; F) Pereopod 5; G) Pereopod 6; H) Pleopod; I) Uropod. Scale 1 mm.
FIGURE 7. Protanais ligniamator, juvenile male paratype. A in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 7. Protanais ligniamator, juvenile male paratype. A) Lateral view, mouthparts not drawn for clarity; B) Maxilliped; C) Cheliped; D) Cheliped of a slightly larger juvenile male; E) Pereopod 6; F) Uropod. Scale bar A 2 mm, scale bar B–F 1 mm.
FIGURE 10. Protanais ligniamator. Mouthpart variation. A1 in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 10. Protanais ligniamator. Mouthpart variation. A1) Right mandible incisor, male; A2) Same, different orientation; B1) Left mandible incisor, male; B2) Same, different orientation; C) Right mandible incisor, different male specimen; D) Left mandible incisor, different male specimen; E) Labium, male; F) Same, different male specimen; G) Labium, female; H) Same, different female specimen. Scale bars 0.25 mm.
FIGURE 1. Protanais ligniamator. A in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 1. Protanais ligniamator. A) Holotype, adult female, dorsal view. B) Paratype, female, lateral view, mouthparts not drawn for clarity. Scale bar 2 mm.
FIGURE 9. Protanais ligniamator, manca III paratype. A in Tanaidacea (Crustacea; Peracarida) from chemically reduced habitats-the hydrothermal vent system of the Juan de Fuca Ridge, Escabana Trough and Gorda Ridge, northeast Pacific
FIGURE 9. Protanais ligniamator, manca III paratype. A) Cheliped; B) Pereopod 1; C) Pereopod 2; D) Pereopod 3; E) Pereopod 4; F) Pereopod 5; G) Pereopod 6; H) Pleopod; I) Uropod. Scale bars A–G + I = 0.5 mm, H = 0.25 mm.
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 11. Seba bathybia n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 11. Seba bathybia n. sp. Paratype male, 3.4 mm (FMNH # 12771). A, gnathopod 1 coxa; B, gnathopod 2 coxa; C, pereopod 3 coxa; D, pereopod 4 coxa; E, pereopod 5 coxa; F, pereopod 6 coxa; G, pereopod 7 coxa; H, head and mouthparts. Scale bar coxa = 0.2 mm, scale bar head = 0.1 mm.
FIGURE 12. Seba bathybia n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 12. Seba bathybia n. sp. Paratypes male, 3.4 mm (FMNH # 12771) female, 3.3 mm (FMNH # 12771). A, pereopod 4 merus, male; B, same, female; C, pereopod 5 merus, male; D, same, female; E, pereopod 6 merus, male; F, same, female; G, pereopod 7 merus, male; H, same, female. Scale bar = 0.3 mm.
FIGURE 10. Seba bathybia n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 10. Seba bathybia n. sp. Paratype male, 3.4 mm and female 3.7 mm (FMNH # 12771). A, gnathopod 1; A1, same, chela; B, gnathopod 2; B1, same chela; B2, same, female, chela; C, pleopod 1; C1, same, retinaculae; D, uropod 1; E, uropod 2; F, uropod 3; G, epimeron 1-3. Scale bar B1, B2, C1 & H 0.1 mm, other scale bars 0.2 mm.
FIGURE 9. Seba bathybia n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 9. Seba bathybia n. sp. Paratype male, 3.4 mm (FMNH # 12771). A, pereopod 3; B, pereopod 4; C, pereopod 5; D, pereopod 6; E, pereopod 7; F, oostegites and gill; G, telson. Scale bar F & detail = 0.1 mm other scale bar 0.2 mm.
FIGURE 8. Seba bathybia n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 8. Seba bathybia n. sp. A, holotype, male, 2.8 mm (FMNH #13758), habitus, lateral view (not straightened), Scale bar 0.5 mm. B-J paratype male, 3.4 mm (FMNH # 12771). B, antenna 1; B1, accessory flagellum; C, antenna 2; D, upper lip, dorsal view; D1, same, lateral view; E, left mandible; F, right mandible; F1, left mandible incisor, lacinia mobilis, spine row; G, lower lip; H, left maxilla 1; H1, right maxilla 1 outer plate spiniform setae; I, maxilla 2; J, maxilliped; J1, same, outer endite; J2, same, inner endite.. Scale bars F1, H1, J1 & J2 = 0.1 mm, other scale bars = 0.2 mm.
FIGURE 6. Schisturella hansgeorgi n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 6. Schisturella hansgeorgi n. sp. Male paratype, 5.4 mm (FMNH #12862). A, gnathopod 1; A1, same distal end of propodus; B, gnathopod 2; B1, same, distal end of propodus; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pereopod 6. Scale bar G1 0.1 = mm, other scales bars = 0.5 mm.
FIGURE 7. Schisturella hansgeorgi n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 7. Schisturella hansgeorgi n. sp. Male paratype, 5.4 mm (FMNH #12862). A, head and mouthparts; B, gnathopod 1 coxa; C, gnathopod 2 coxa; D, pereopod 5 coxa; E, pereopod 6 coxa; F, pereopod 7 coxa; G, gills. Scale bars = 0.2 mm.
FIGURE 5. Schisturella hansgeorgi n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 5. Schisturella hansgeorgi n. sp. Male paratype, 5.4 mm (FMNH #12862). A, upper lip, lateral view; B, left mandible; C, right mandible; D, maxilla 1; D1, outer plate apical setae; D2, distal palp article; E, maxilla 2; F, maxilliped; G uropod 1; H, uropod 2; I uropod 3; J, Telson. Scale bars, mouthparts 0.2 mm, details 0.1 mm, other scale bars: 0.5 mm.
FIGURE 4. Schisturella hansgeorgi n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 4. Schisturella hansgeorgi n. sp. A, holotype, male habitus, lateral view (not straightened), 7.4 mm (FMNH # 13757), Scale bar 1 mm; B–D male paratype, 5.4 mm (FMNH #12862). B, antenna 1; C, antenna 2; D, lower lip; E, pleopod 1, setae not fully drawn for clarity. E1 peduncle retinaculae. Scale bar E1 = 0.1 mm, other scale bars = 0.5 mm.
FIGURE 2. Paronesimoides voightae n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 2. Paronesimoides voightae n. sp. Female paratypes, 4.7 & 4.9 mm (FMNH # 13027 & 12906). A, gnathopod 1; A1, same, palm and dactylus; B, gnathopod 2; B1, same, propodus; B2, same dactylus; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pereopod 6; G, pereopod 7; H, pleopod 1, setae not fully drawn for clarity; I, head and mouthparts. Scale bar A1, B1 0.2 mm, B2 0.1 mm, scale bar head = 0.2, other scale bars 0.5 mm.
FIGURE 1. Paronesimoides voightae n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 1. Paronesimoides voightae n. sp. A, holotype habitus, lateral view (not straightened), female 5.2 mm (FMNH #13756). Scale bar 1 mm. – B–K paratypes, female, size 4.7 & 4.9 mm (FMNH # 13027 & 12906). B, antenna 1; C, antenna 2; C1, same different angle and specimen; D, upper lip, lateral view; D1 same, dorsal view; E, left mandible; E1, same, section of incisor and spine row (lateral view); E2 same, single spine of spine row; F, right mandible; G, lower lip; H, maxilla 1; H1 same, outer plate apical setae; H2, same, palp distal article; I, maxilla 2; J, maxilliped; J1 same, dactylus. Scale bar C1, H1, H2 and J1 0.1 mm, other scale bars 0.2 mm.
FIGURE 3. Paronesimoides voightae n in Amphipoda (Crustacea; Peracarida) from the Hydrothermal vent system of the Juan De Fuca Ridge, Escabana trough and Gorda ridge, Northeast Pacific. Part I. Lysianassidae and Sebidae
FIGURE 3. Paronesimoides voightae n. sp. Female paratype, 4.9 mm (FMNH #12906) and male paratype (FMNH # 12848) 4.2 mm. A, female gnathopod 1 coxa; B, female gnathopod 2 coxa; C, female telson; D, female coxa 7- epimeron 3; E, brood plate; F, female gill; G, gnathopod 1, male; G1, same, palm. H, uropod, female 1; I, uropod, female 2; J, uropod, female 3. Scale bar A, B, G = 0.5 mm. Scale bars H, I, J 0.1 mm., other scale bars = 0.2 mm.
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