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51 results for “fan worms”
FIGURE 5 in An abundant new genus and species of fan worms (Polychaeta: Sabellidae) from Hawaii
FIGURE 5. Longitudinal, histological sections of Euchonoides moeone n. sp. A, body, regenerating thorax; B, base of radiolar crown and collar, lateral view; C, same, frontal view; D, pre-pygidial depression and pygidium; E–F, belt on third abdominal chaetiger, G, sexual abdominal segments; H, J, details of glandular epithelium of belt of third abdominal chaetiger; I, detail of a mature oocyte and follicle cells. In A–B, D and I, the section plane is shown, where A refers to the anterior region, P to the posterior region, d dorsal zone and v ventral zone. Black arrows in A, E–G, I–J points to glandular belt on third abdominal chaetiger. Abbreviations: A1: abdominal chaetiger 1, A2: abdominal chaetiger 2, A3: abdominal chaetiger 3.
FIGURE 3 in An abundant new genus and species of fan worms (Polychaeta: Sabellidae) from Hawaii
FIGURE 3. SEM of Euchonoides moeone n. sp. A, complete specimen in lateral view, inset showing glandular belt on third abdominal chaetiger; B, radiolar crown; C, anterior peristomial ring and posterior peristomial ring collar in dorsal view; D, posterior peristomial ring collar in ventro-lateral view; E, posterior end with pygidium, ventro-lateral view.
FIGURE 1. Euchonoides moeone n in An abundant new genus and species of fan worms (Polychaeta: Sabellidae) from Hawaii
FIGURE 1. Euchonoides moeone n. sp. A, complete paratype, lateral view; B, complete paratype, ventral view; C, detail of patch of cilia (pc) on posterior peristomial ring collar and glandular ridge (gr) on chaetiger 2; D, dissected radiolar crown with arrows showing elongate dorsal lips and ventral radiolar appendages; E, inferior, thoracic, short, broadly hooded chaetae; F, inferior, thoracic bayonet chaeta; G, thoracic acicular uncini; H, anterior abdominal uncinus; I, posterior abdominal uncini, frontal and lateral view, respectively; J, posterior end showing pre-pygidial segments and pygidium, ventral view; K, posterior end, dorsal view. Abbreviations: ar, abdominal ridge; ch, chaetiger; es, eyespots; fg, faecal groove; gr, glandular ridge; pc, patch of cilia; pyg, pygidium; pre-pyg, pre-pygidial chaetigers. Pinnules in A–B may be confused with radioles, there are only three pairs or radioles.
FIGURE 4 in Aracia sinaloae sp. n., a new brooding, simultaneous hermaphroditic fan worm from southern Gulf of California (Polychaeta: Sabellidae)
FIGURE 4. Aracia sinaloae sp. n. A, Ventral collar lappets and ventral shields stained with methyl green; B, dorsal lips indicated by arrows and embryos attached to right dorsal-most radiole; C, left dorsal-most radiole with two attached early larvae indicated by arrows; D, late larvae; E–F, dorsal lips (indicated by arrows), dorsal view; G. dorsal lips (indicated by arrows), frontal view of peristomium (ventral lips and radioles removed); H, superior group of thoracic notochaetae; I, thoracic uncinus; J, abdominal uncinus; K, oocytes; L, spermatozoa. A–K, Paratypes EMU–ICML–10034/10035. Abbreviations: vlventral lappets, vsc—ventral shield of collar. Scale bars: A, 0.5 mm; B, E–G, 0.25 mm; C–D, 100 µm; H, 20µm; I–J, 5µm; K, not scaled, 40X; L, not scaled, 100X.
FIGURE 2 in Aracia sinaloae sp. n., a new brooding, simultaneous hermaphroditic fan worm from southern Gulf of California (Polychaeta: Sabellidae)
FIGURE 2. Body structures of Aracia sinaloae sp. n. A, Adult, dorsal view; B, juvenile, dorsal view; C, branchial crown of mature specimen, lateral view; D, cocoon; E, detail of embryos; F, larva; G, collar, dorsal view; H, collar, ventral view, midventral patch of cilia as indicated by arrow. A–H, Paratypes UAA–M142B, M145C mounted for SEM. Abbreviations: apranterior peristomial ring, fg—faecal groove, vsc—ventral shield of collar. White arrow in F: neurotroch, black arrow: prototroch. Scale bars: A, 500 µm; B–D, 200 µm; E, G–H, 100 µm; F, 20 µm.
FIGURE 1 in Aracia sinaloae sp. n., a new brooding, simultaneous hermaphroditic fan worm from southern Gulf of California (Polychaeta: Sabellidae)
FIGURE 1. Aracia sinaloae sp. n., live colour. A, Entire body, dorsal view, showing distribution of oocytes and sperm; B, as A, arrow indicates cocoon; C, thorax and anterior abdomen showing oocytes through body wall as indicated by arrow; D, detail of collar and base of branchial crown, dorsal view; E, cocoon attached to dorsal-most radiolar pair; F, collar and base of branchial crown, lateral view, showing peristomial eye as indicated by arrow. A–F, Holotype MCZ–20145. Scale bars: A–B, 1 mm; C–D, F, 0.5 mm; E, 0.8 mm.
FIGURE 3 in Aracia sinaloae sp. n., a new brooding, simultaneous hermaphroditic fan worm from southern Gulf of California (Polychaeta: Sabellidae)
FIGURE 3. Chaetae and uncini of Aracia sinaloae sp. n. A, Thoracic chaetigers (1: chaetiger 1, 2: chaetiger 2, 3: chaetiger 3); B, thoracic chaetae; C, paleate chaetae; D, thoracic, narrowly hooded chaetae; E, thoracic uncini and companion chaetae; F, abdominal noto- and neurochaetae; G, abdominal neurochaetae; H–I, abdominal uncini. A–I, Paratypes UAA–M147A mounted for SEM. Scale bars: A, 50 µm; B, D, 20 µm; C, E–H, 10 µm; I, 5 µm.
FIGURE 21 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 21. Detail of the phylogenetic hypothesis, Sabellomma, and specific hypotheses, from Fig. 20, showing optimizations of dorsal pinnular appendages. The formal definitions of these hypotheses are also presented, indicating that specific hypothesis S. minuta cannot be defined (cf. Figs 23–24 for alternative optimizations).
FIGURE 23 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 23. Detail of the phylogenetic and specific hypotheses from Fig. 22, showing optimizations of dorsal pinnular appendages. The formal definitions of these hypotheses are also presented, indicating that specific hypotheses S. collinae and S. harrisae cannot be defined (cf. Figs 21, 24 for alternative optimizations).
FIGURE 20 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 20. Strict consensus tree presented in Fig. 19, but 'inapplicable' character optimizations for distribution of simple eyes (subject 9; cf. Tables 6–7) correctly treated as inapplicable. Note that Sabellomma is monophyletic on the basis of simple eyes distributed along the entire lengths of radioles [9(1)]. Relationships among Sabellomma are determined by one of the optimizations of dorsal pinnular appendages (subject 13); compare with alternate optimization in Fig. 22.
FIGURE 19 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 19. Strict consensus tree of six minimum-length cladograms (phylogenetic analysis 2 - see text for discussion), showing relationships among apomorphic genera within Sabellinae. Note that the genus Sabellomma is paraphyletic. Character optimizations across all cladograms are indicated for the following subjects (cf. Tables 6–7): 9. distribution of simple eyes along radiole margins; 13. dorsal pinnular appendages; 21. interramal eyespots. Note the ambiguous optimizations for distribution of simple eyes, as a consequence of the use of 'inapplicable' codings.
FIGURE 16 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 16. Methyl green staining. Sabellomma minuta gen. nov., comb. nov. (spec. 16 [ZUEC-POL 7444], photographed after ~2 hours in ethanol after immersion in methyl green solution). A: total worm, ventral view; B: total worm, dorsal view; C–D: anterior end, ventral views; E: posterior end, ventral view; F: posterior end, dorsal view. Sabellomma collinae gen. nov., sp. nov. (holotype [LACM-AHF 2404], photographed after ~2.5 hours in ethanol after immersion in methyl green solution). G: total worm, right lateral view; H: anterior end, dorsal view; I–J: anterior end, ventral views; K: posterior end, right lateral view. Scale bars: A–B, G = 1 mm; C, I = 0.7 mm; D–F, K = 0.3 mm; H, J = 0.4 mm.
FIGURE 14 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 14. Sabellomma harrisae gen. nov., sp. nov. A: parapodia from segments 1–2; B: collar chaetae; C: notochaetae from segment 4; D–F: inferior thoracic notochaetae (paleae) from segments 3, 4 and 4, respectively; G, J: posterior abdominal neurochaetae; H–I: mid-abdominal neurochaetae. All photos from paratype 6 (LACM-AHF 2419). Scale bars: A = 40 µm; B, G–H, J = 20 µm; C = 25 µm; D = 15 µm; E = 5 µm; F = 7 µm; I = 8 µm.
FIGURE 18 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 18. Strict consensus tree of 16 minimum-length cladograms (phylogenetic analysis 1 - see text for discussion), showing relationships among Sabellinae. Note that the genus Sabellomma is paraphyletic.
FIGURE 15 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 15. Sabellomma harrisae gen. nov., sp. nov. A: neurochaetae from segment 4; B: uncini from segment 3; C: companion chaetae from segment 3; D–E: uncini from segment 6; F, J: anterior abdominal uncini; G–I: posterior abdominal uncini. All photos from paratype 6 (LACM-AHF 2419). Scale bars: A = 15 µm; B = 8 µm; C = 3 µm; D, G, J = 4 µm; E, I = 5 µm; F, H = 2 µm.
FIGURE 10 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 10. Sabellomma collinae gen. nov., sp. nov. A: notochaetae from segment 4; B: inferior thoracic notochaetae (paleae) from segment 2; C–D: mid-abdominal neurochaetae; E: neurochaetae from segment 3; F: mid-abdominal uncini; G: neurochaetae from segment 2; H: uncini from segment 3; I–K: companion chaetae from segments 4, 3 and 2, respectively. All photos from paratype 6 (LACM-AHF 2410). Scale bars: A = 30 µm; B = 10 µm; C–D = 12 µm; E = 20 µm; F = 5 µm; G–H = 8 µm; I, K = 4 µm; J = 2 µm.
FIGURE 11 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 11. Sabellomma harrisae gen. nov., sp. nov. A–B: live specimens; C: total worm, dorsal view; D: total worm, ventral view; E: total worm, right lateral view; F: anterior end, right lateral view; G: detail of anterior end, right lateral view; H: anterior end, dorsal view; I: anterior end, ventral view; J: posterior end, left ventro-lateral view. Photos A–B from paratype 11 (LACM-AHF POLY 2424; no track for other specs in photo B), courtesy L. Harris; photos C–J from holotype (LACM-AHF 2413). Scale bars: C–E = 0.5 mm; F = 0.4 mm; G, J = 0.2 mm; H–I = 0.3 mm.
FIGURE 9 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 9. Sabellomma collinae gen. nov., sp. nov. A: collar chaetae; B: notochaetae from segment 4; C: neurochaetae from segment 13; D: notochaeta from anterior row from segment 13; E: notochaeta from posterior row from segment 13; F: neurochaetae from segment 4; G–H: uncini from segment 15. All photos from paratype 6 (LACM-AHF 2410). Scale bars: A–B, D = 30 µm; C, E = 25 µm; F = 20 µm; G–H = 10 µm.
FIGURE 12 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 12. Sabellomma harrisae gen. nov., sp. nov. A: anterior end, right lateral view; B: anterior end, left lateral view; C: dissected half crown and lips; D: anterior end, dorsal view; E: anterior end, ventral view; F: anterior end, left lateral view; G: anterior end, right lateral view; H–I: details of collar and base of crown, right ventro-lateral and dorsal views, respectively; J: dorsal lip (dissected crown); unspecified arrow points to connection between dorsal lip and dorsal pinnular appendage. br = branchial ridge; dl = dorsal lip; pa = pinnular appendage; pl = parallel lamellae; ra = radiolar appendage; vs = ventral sacs. Photos A–B, D–I from paratype 6 (LACM-AHF 2419); photos C and J from paratype 12 (LACM-AHF 2425). Scale bars: A, C = 0.3 mm; B = 0.4 mm; D, F–G = 0.1 mm; E, I = 75 µm; H, J = 50 µm.
FIGURE 13 in A new genus and new species of fan worms (Polychaeta: Sabellidae) from Atlantic and Pacific Oceans—the formal treatment of taxon names as explanatory hypotheses
FIGURE 13. Sabellomma harrisae gen. nov., sp. nov. A: collar chaetae; B: notochaetae from segment 3; C: superior thoracic notochaetae from segment 3; D: inferior thoracic notochaetae (paleae) from segment 3; E: neurochaetae from segment 12; F–G: uncini from segment 3; H: companion chaetae from segment 3; I: uncini from segment 10. All photos from paratype 10 (LACM-AHF 2423). Scale bars: A–E = 30 µm; F, H = 8 µm; G = 15 µm; I = 10 µm.
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