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70 results for “Siboglinidae”
Fig. 15 in The metatrochophore of a deep-sea hydrothermal vent vestimentiferan (Polychaeta: Siboglinidae)
Fig. 15 Schematic drawing of development from metatrochophore to adult in frenulates (a, b) and vestimentiferans (c, d). Metatrochophore b, c prostomium with apical organ (ao) and coelomic cavity (cp); peristomium, ring-like area including mouth (mo) and prototroch (pr); first segment with paired coelomic cavity (c1) and neurotroch (nr), and uncini; second segment with paired coelomic cavity (c2) and uncini; pygidium not drawn, anus (a) ending terminally in larvae of vestimentiferans, but absent in frenulates; tentacles (te) behind the prototroch; note difference between metatrochophore of frenulates and vestimentiferans is the development of tentacles from peristomium in frenulates (b) and from first segment in vestimentiferans (c). a Frenulate adult organization: head is composed of cephalic lobe (cl) (originating from the prostomium) and forepart (fp) (originating from the peristomium and anterior part of first segment); tentacles (te) are head appendages; trunk (t) develops from posterior part of first segment; opisthosoma (op) is composed of second segment and additional segments; note that the muscular septum in the first segment is the border between head and trunk; d vestimentiferan adult organization: head (vestimentum v) originates from prostomium, peristomium, and anterior part of first segment; obturacular region (ob) formed by head appendages; trunk (t) develops from the posterior part of first segment; opisthosoma (op) is composed of second segment and additional segments; note that no muscular septum separates the head from the trunk
Fig. 3 in The metatrochophore of a deep-sea hydrothermal vent vestimentiferan (Polychaeta: Siboglinidae)
Fig. 3 Longitudinal sections, ultrathin of specimen #542 (a, b) and semithin of specimen #675 (c, d). a Prostomium anterior to peristomium with prototroch (pr), tentacle (te), foregut (fg), and midgut (mg) with adjacent ventral blood vessel (vv); b prostomium with unpaired coelomic cavity (cp) anterior to peristomium with prototroch (pr) and mouth opening (mo), segment 1 with tentacle (te), foregut (fg), and
Fig. 9 in The metatrochophore of a deep-sea hydrothermal vent vestimentiferan (Polychaeta: Siboglinidae)
Fig. 9 Brain in prostomium, specimen #308. a Anterior region with many somata (so) between dorsal and lateral epidermis and mesoderm (me) with ECM (arrows); b posterior region with somata (so) and neuropil (neu); mesoderm (me) with ECM (arrows) and surrounding small unpaired coelomic cavity (asterisk), large trochoblast (tb) of prototroch
Figure 5 from: Fujiwara Y, Jimi N, Sumida PYG, Kawato M, Kitazato H (2019) New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae). ZooKeys 814: 53-69. https://doi.org/10.3897/zookeys.814.28869
Figure 5 Phylogenetic placement of Osedaxbraziliensis sp. n. based on nucleotide sequences on the concatenated COI, 16S, and 18S markers, using maximum likelihood. Scale bar represents 0.1 nucleotide substitutions per sequence position. Only bootstrap values greater than 50 are shown for each branch. Osedaxbraziliensis sp. n. is boxed.
Figure 1 from: Fujiwara Y, Jimi N, Sumida PYG, Kawato M, Kitazato H (2019) New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae). ZooKeys 814: 53-69. https://doi.org/10.3897/zookeys.814.28869
Figure 1 Sampling location of Osedaxbraziliensis sp. n. Solid star indicates the sampling location where a whale carcass was discovered at a depth of 4,204 m.
Figure 3 from: Fujiwara Y, Jimi N, Sumida PYG, Kawato M, Kitazato H (2019) New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae). ZooKeys 814: 53-69. https://doi.org/10.3897/zookeys.814.28869
Figure 3 Photographs of unfixed Osedaxbraziliensis sp. n. A Palps (pa), trunk (tr) and a gelatinous hemispherical tube (tu)B lateral view of palps (pa), trunk (tr), ovary (o), and root (r)C ventral view of palps (pa) with pinnules (pi) and trunk (tr). Dwarf males (m) inhabit a gelatinous tube (tu), and D ventro-lateral view of an individual possessing a yellow bump (b) present behind prostomium E Ventral view of holotype (NMST-Pol H-685) possessing a yellow patch (pt)F Ventral view of an individual without yellow bump.
Figure 4 from: Fujiwara Y, Jimi N, Sumida PYG, Kawato M, Kitazato H (2019) New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae). ZooKeys 814: 53-69. https://doi.org/10.3897/zookeys.814.28869
Figure 4 Scanning electron micrographs of Osedaxbraziliensis sp. n. A Ventro-lateral view of bump (b)B lateral view of palps (pa) with pinnules (pi), and C dorsal view of palps (pa) and oviduct (od)D Dwarf male taken from the tube of a female.
Figure 2 from: Fujiwara Y, Jimi N, Sumida PYG, Kawato M, Kitazato H (2019) New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae). ZooKeys 814: 53-69. https://doi.org/10.3897/zookeys.814.28869
Figure 2 Whale skeleton discovered at a depth of 4,204 m in the South Atlantic Ocean. A Sunken whale skeleton of the Atlantic minke whale (Balaenopterabonaerensis). Seven vertebrae are visible in this field of view. Osedaxbraziliensis sp. n. had colonised the first two bones on the right B Close-up view of a vertebra colonized by O.braziliensis sp. n. Galatheid crabs (Munidopsis spp.), amphipods (Stephonyx sp.), and gastropods (Rubyspira sp.) were also seen on and around the bones.
Figure 3 in Geochemistry drives the allometric growth of the hydrothermal vent tubeworm Riftia pachyptila (Annelida: Siboglinidae)
Figure 3. Summary of our findings on the allometric growth of Riftia pachyptila. A, all body parts, namely obturaculum (ob), vestimentum (vm), trunk (tr), and opisthosoma (op), are shorter in juveniles than in adults; the growth rate is higher for the trunk, and minimal for the opisthosoma (Hypothesis 1). The lines connect the body parts to make these differences even more evident. B, the different conditions between the basalt-hosted, sulphide-rich vents at 9 °EPR and 21 °N EPR, and the highly sedimented, sulphide-poor vents at 27 °N EPR in the Guaymas Basin affect the growth of each body part (Hypothesis 2). The 'fat' morphotype from basalt locations is characterized by the presence of thicker vestimentum (Ø vm), wider tube opening (Ø tb), longer trunk (L tr), and comparatively shorter obturaculum (L ob) and smaller number of tentacular lamellae (N lam). The 'slim' morphotype from the sedimented vents has thinner and shorter trunk, but longer tentacular crowns and higher number of lamellae. This variability might be adaptive and selected to keep the sulphide uptake near to the optimum values for the symbionts.
Figure 2 in Geochemistry drives the allometric growth of the hydrothermal vent tubeworm Riftia pachyptila (Annelida: Siboglinidae)
Figure 2. Morphology of the vestimentiferan tubeworms Riftia pachyptila. A, drawings of a female in different positions. Body parts measured in this study: obturaculum (ob) comprising the obturacular lobes (obl) and tentacular lamellae (tl), vestimentum (vm), trunk (tr), and opisthosoma (op). B, male individual distinguished by genital grooves (gg). C, the unique finding of Riftia individuals from the Guaymas Basin with split lobes of the ventral posterior vestimental fold (pvm). D–F, individuals with different body proportions: D, juvenile female; E, F, adult females.
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