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668 results for “polychaetes”
Figure 5 from: Conde-Vela VM (2019) Sinkhole and brackish water nereidid polychaetes: Revision of Stenoninereis Wesenberg-Lund, 1958 (Annelida). Subterranean Biology 30: 95-115. https://doi.org/10.3897/subtbiol.30.36273
Figure 5 Stenoninereislackeyi (Hartman, 1958) comb. n. A–F non-type specimen (USNM 45699) A whole specimen, dorsal view B left jaw, dorsal view C Chaetiger 2, right parapodium, anterior view D Chaetiger 6, right parapodium, anterior view E Chaetiger 17, right parapodium, anterior view F Chaetiger 23, right parapodium, anterior view G Chaetiger 29, right parapodium, anterior view. Scale bars: 1 mm (A); 50 µm (B); 0.1 mm (C–G).
Figure 2 from: Conde-Vela VM (2019) Sinkhole and brackish water nereidid polychaetes: Revision of Stenoninereis Wesenberg-Lund, 1958 (Annelida). Subterranean Biology 30: 95-115. https://doi.org/10.3897/subtbiol.30.36273
Figure 2 Stenoninereismartini Wesenberg-Lund, 1958 A, C–F syntypes (USNM 29726) B non-type (USNM 61623) A whole specimens, dorsal view B whole specimen, dorsal view C close-up of prostomium, dorsal view D chaetiger 6, left parapodium, anterior view (dorsal cirrostyle incomplete) E chaetiger 13, left parapodium, anterior view F chaetiger 18, left parapodium, anterior view. Scale bars: 0.5 mm (A–B); 0.1 mm (C–F).
Figure 1 from: Conde-Vela VM (2019) Sinkhole and brackish water nereidid polychaetes: Revision of Stenoninereis Wesenberg-Lund, 1958 (Annelida). Subterranean Biology 30: 95-115. https://doi.org/10.3897/subtbiol.30.36273
Figure 1 Morphology of Stenoninereis species A non-type of S.lackeyi comb. n. (USNM 53273) B, I syntypes of S.elisae sp. nov. (USNM 55366) C–F non-type of S.elisae sp. nov. (USNM 55360) G non-type of S.martiniWesenberg-Lund 1958 (USNM 61623) H holotype of S.tecolutlensis de León-González & Solís-Weiss, 1997 (USNM 174870) A anterior end, dorsal view B chaetiger 6, left parapodium (solid and dashed red lines: vessels; solid and dashed light blue lines: unknown structures, likely nerves) C shaft of notopodial sesquigomph spinigers, chaetiger 20 D shaft of neuropodial supra-acicular sesquigomph spiniger, same chaetiger E shaft of neuropodial sub-acicular heterogomph spiniger, chaetiger 20 F Shaft of neuropodial sub-acicular heterogomph falciger, chaetiger 20 G–I anterior ends, dorsal view. Abbreviations: AC, anterior cirri; An, antennae; Cp, cirrophore; Cs, cirrostyle; DC, dorsal cirrus; Es, esophagus; NeL, neuroacicular ligule; NoD, notopodial dorsal ligule; NoV, notopodial ventral ligule; Ph, pharynx; Pp, palpophore; Ps, palpostyle; VC, ventral cirrus; ¿?, unknown structures, likely nerves by their position. Scale bars: 0.2 mm (A, G–I); 0.1 mm (B); 5 µm (C–F).
Figure 4 from: Conde-Vela VM (2019) Sinkhole and brackish water nereidid polychaetes: Revision of Stenoninereis Wesenberg-Lund, 1958 (Annelida). Subterranean Biology 30: 95-115. https://doi.org/10.3897/subtbiol.30.36273
Figure 4 Stenoninereislackeyi (Hartman, 1958) comb. n. A–J paratype (AHF-POLY-806) A whole specimen, dorsal view B anterior end, dorsal view C posterior end, dorsal view D notopodial sesquigomph spiniger, chaetiger 27 E supra-acicular sesquigomph spinigers, chaetiger 27 F sub-acicular heterogomph spiniger, chaetiger 27 G sub-acicular heterogomph falcigers (uppermost one at the left), chaetiger 27 H chaetiger 7, right parapodium, anterior view I chaetiger 19, right parapodium, anterior view J chaetiger 26, right parapodium, anterior view. Scale bars: 1 mm (A); 0.25 mm (B–C); 10 µm (D–G) 0.1 mm (H–J).
Figure 3 from: Conde-Vela VM (2019) Sinkhole and brackish water nereidid polychaetes: Revision of Stenoninereis Wesenberg-Lund, 1958 (Annelida). Subterranean Biology 30: 95-115. https://doi.org/10.3897/subtbiol.30.36273
Figure 3 Stenoninereismartini Wesenberg-Lund, 1958 A–J non-type specimens (USNM 61623) A chaetiger 2, right parapodium, anterior view B chaetiger 9, right parapodium, anterior view C chaetiger 21, right parapodium, anterior view D chaetiger 27, right parapodium, anterior view E chaetiger 28, left parapodium, anterior view F notopodial sesquigomph spinigers, chaetiger 28 G supra-acicular sesquigomph spinigers, chaetiger 28 H sub-acicular heterogomph spiniger, chaetiger 28 I sub-acicular heterogomph spiniger, chaetiger 28 J left jaw, dorsal view. Scale bars: 50 µm (A, D); 0.1 mm (B–C); 10 µm (F–I); 50 µm (J).
Figure 6 from: Conde-Vela VM (2019) Sinkhole and brackish water nereidid polychaetes: Revision of Stenoninereis Wesenberg-Lund, 1958 (Annelida). Subterranean Biology 30: 95-115. https://doi.org/10.3897/subtbiol.30.36273
Figure 6 Stenoninereiselisae sp. nov. A–M Syntypes (USNM 55366) A whole specimen, dorsal view B whole specimens, dorsal view C anterior end, dorsal view D Posterior end, dorsal view E chaetiger 6, right parapodium, anterior view F chaetiger 16, right parapodium, anterior view G chaetiger 18, right parapodium, anterior view H chaetiger 24, right parapodium, anterior view I subacicular heterogomph spinigers, chaetiger 18 J–L subacicular heterogomph falcigers, chaetiger 18 M notopodial homogomph spiniger, chaetiger 49. Scale bars: 0.5 mm (A–B); 0.25 mm (C); 0.2 mm (E–H); 10 µm (I–L); 30 µm (M).
Figure 1 from: Jimi N, Kimura T, Ogawa A, Kajihara H (2018) A new species of the rare, deep-sea polychaete genus Benthoscolex from the Sea of Kumano, Japan (Annelida, Amphinomidae). ZooKeys 738: 81-88. https://doi.org/10.3897/zookeys.738.22927
Figure 1 - Benthoscolex seisuiae sp. n., holotype (NSMT-Pol H-676). A whole body, dorsal view B anterior end, dorsal view C median body, dorsal view D posterior end, dorsal view. Scale bars: 5 mm (A); 1 mm (B); 3 mm (C–D).
Figure 3 from: Jimi N, Kimura T, Ogawa A, Kajihara H (2018) A new species of the rare, deep-sea polychaete genus Benthoscolex from the Sea of Kumano, Japan (Annelida, Amphinomidae). ZooKeys 738: 81-88. https://doi.org/10.3897/zookeys.738.22927
Figure 3 - Four of the five irregular sea urchin species that were contained in the same haul with Benthoscolex seisuiae sp. n., aboral view. A Brisaster latifrons (A. Agassiz, 1898), NSMT E-10723 B Brissopsis luzonica (Gray, 1851), NSMT E-10721 C Lovenia gregalis Alcock, 1893, NSMT E-10719 D Schizaster sp., NSMT E-10725. Scale bars 1 cm.
Figure 2 from: Jimi N, Kimura T, Ogawa A, Kajihara H (2018) A new species of the rare, deep-sea polychaete genus Benthoscolex from the Sea of Kumano, Japan (Annelida, Amphinomidae). ZooKeys 738: 81-88. https://doi.org/10.3897/zookeys.738.22927
Figure 2 - Benthoscolex seisuiae sp. n., holotype (NSMT-Pol H-676). A anterior end, dorsal view B left parapodium of chaetiger 15, posterior view C harpoon notochaeta D bifurcate notochaeta with short tip E bifurcate notochaeta with long tip F bifurcate neurochaeta with short tip G bifurcate neurochaeta with long tip. Scale bars: 1 mm (A–B); 100 μm (C–G).
Data from: Temporal genetic structure in a poecilogonous polychaete: the interplay of developmental mode and environmental stochasticity
Background: Temporal variation in the genetic structure of populations can be caused by multiple factors, including natural selection, stochastic environmental variation, migration, or genetic drift. In benthic marine species, the developmental mode of larvae may indicate a possibility for temporal genetic variation: species with dispersive planktonic larvae are expected to be more likely to show temporal genetic variation than species with benthic or brooded non-dispersive larvae, due to differences in larval mortality and dispersal ability. We examined temporal genetic structure in populations of Pygospio elegans, a poecilogonous polychaete with within-species variation in developmental mode. P. elegans produces either planktonic, benthic, or intermediate larvae, varying both among and within populations, providing a within-species test of the generality of a relationship between temporal genetic variation and larval developmental mode. Results: In contrast to our expectations, our microsatellite analyses of P. elegans revealed temporal genetic stability in the UK population with planktonic larvae, whereas there was variation indicative of drift in temporal samples of the populations from the Baltic Sea, which have predominantly benthic and intermediate larvae. We also detected temporal variation in relatedness within these populations. A large temporal shift in genetic structure was detected in a population from the Netherlands, having multiple developmental modes. This shift could have been caused by local extiction due to extreme environmental conditions and (re)colonization by planktonic larvae from neighboring populations. Conclusions: In our study of P. elegans, temporal genetic variation appears to be due to not only larval developmental mode, but also the stochastic environment of adults. Large temporal genetic shifts may be more likely in marine intertidal habitats (e.g. North Sea and Wadden Sea) which are more prone to environmental stochasticity than the sub-tidal Baltic habitats. Sub-tidal and/or brackish (less saline) habitats may support smaller P. elegans populations and these may be more susceptible to the effects of random genetic drift. Moreover, higher frequencies of asexual reproduction and the benthic larval developmental mode in these populations leads to higher relatedness and contributes to drift. Our results indicate that a general relationship between larval developmental mode and temporal genetic variation may not exist.
Figure 2 in A new polychaete genus and species of the Kongsfjorden, Spitsbergen, Svalbard
Figure 2. Glyphochaeta laudieni gen sp. n., SEM micrographs. (A) Anterior end, frontal view; (B) anterior end, ventral view; (C) lateral view of chaetigers 12–15, neuropodial hooded hooks of chaetiger 12 and 13 broken off; (D) grooved spine of chaetiger 16; (E) neuropodial hooded hooks of a posterior chaetiger; (F) neuropodial hooded hook of a posterior chaetiger, two apical teeth above the main tooth. Scale bars: 60 mm (A, C); 100 mm (B); 10 mm (D); 4 mm (E); 3 mm (F).
FIG. 4 in A new branchiate hesionid polychaete (Annelida, Hesionidae) from New Caledonia
FIG. 4. — The single most parsimonious tree. Numerals above lines represent Bremer support values, numerals below lines represent node numbers.
Figure 2 in Vrijenhoekia balaenophila, a new hesionid polychaete from a whale fall off California
Figure 2. Live Vrijenhoekia balaenophila gen. nov., sp. nov. A, specimen photographed in situ, crawling on a piece of whale bone among Osedax frankpressi; B, relaxed specimen in dorsal view, probably a female. Exact scale unknown, but the specimen is about 25 mm long.
Figure 10 in A phylogenetic analysis of the genus Eunice (Eunicidae, polychaete, Annelida)
Figure 10. Consensuses of 200 most parsimonious trees resulting from composite analyses. A, 50% majority rule consensus, numerals below branches represent the percentage of the most parsimonious trees in which the clade is present. B, Adams consensus. *Eunicidae outgroup species; **Onuphidae species.
Figure 6. Mandibles. A in A phylogenetic analysis of the genus Eunice (Eunicidae, polychaete, Annelida)
Figure 6. Mandibles. A, Eunice rubra Grube, 1856 ventral view. B, C, Palola brasiliensis Zanol, Paiva & Attolini, 2000 ventral, and dorsal views. D, E, Lysidice ninetta Audouin & Milne Edwards, 1833 ventral, and dorsal views. MI, muscle insertion; OM, outline of the organic matrix. Scale bars = 1 mm.
Figure 8 in A phylogenetic analysis of the genus Eunice (Eunicidae, polychaete, Annelida)
Figure 8. Marphysa cf. atlantica Kinberg, 1865. A, spatula-shaped pectinate chaetae. B, parapodium of chaetiger 109, left side. SPC, spatula-shaped pectinate chaetae.
Figure 3 in A phylogenetic analysis of the genus Eunice (Eunicidae, polychaete, Annelida)
Figure 3. Schematic drawing of the shape of prostomial appendages. A, digitiform. B, tapering. C, clavate. D, fusiform. E, button shaped.
FIGURE 2. Outer GBR and Lizard Island collection sites 19 –21 in Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes
FIGURE 2. Outer GBR and Lizard Island collection sites 19 –21, listed in Table 2.
FIGURE 1. Lizard Island, aerial view showing collection sites 1–18 in Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes
FIGURE 1. Lizard Island, aerial view showing collection sites 1–18, listed in Table 2.
Figure 2 from: Arteaga-Florez C, Fernandez-Rodriguez V, Londoño-Mesa M (2014) First record of the polychaete Ficopomatus uschakovi (Pillai, 1960) (Annelida, Serpulidae) in the Colombian Caribbean, South America. ZooKeys 371: 1-11. https://doi.org/10.3897/zookeys.371.5588
Figure 2 - Ficopomatus uschakovi (Pillai, 1960). Specimen SERP 0031B: A Antero-dorsal view B Operculum in anterior view C Operculum in lateral view G Geniculate chaetae from the abdomen H Limbate chaetae from chaetiger 3 I Toothed and limbate chaetae from collar J Toothed chaetae, detail K Uncini from chaetiger 3. Specimen SERP 0033 in methyl green: D Complete specimen in dorsal view E Operculum in lateral view. Specimen 1 SERP 0034: F Operculum in lateral view.
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International Brain Laboratory public data
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OpenNeuro
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