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18 results for “Lygdamis”
FIGURE 10. Phragmatopoma caudata from Brazil, live female. A in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 10. Phragmatopoma caudata from Brazil, live female. A. Anterior end, ventral view; B. Detail of base of operculum showing a pigmented with eyespots median ridge, and median organ absent.
FIGURE 9 in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 9. Median organ and ridge diversity in other Australian sabellariids. A. Lygdamis augeneri, AM W.27564, stained with methylene blue, with conical median organ, eyespots along median ridge; B. Lygdamis giardi, AM W.7958, with conical median organ (MO) and eyespots (white arrow) along median ridge (MR); C. Phalacrostemma maloga, AM W.27567, with a cylindrical and rounded distal end median organ as a prolongation of the median ridge; D. Tetreres terribilis, AM W.4994, lacking median organ, median ridge inconspicuous.
FIGURE 8 in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 8. Median organ and ridge diversity in Australian Idanthyrsus. A. Idanthyrsus australiensis, AM W.201770, with conical median organ (MO), eyespots (white arrow) along median ridge (MR); B. Idanthyrsus sp. cf. I. australiensis AM W.29153, with flattened, triangular median organ; eyespots absent along median ridge; C. Idanthyrsus sp. cf. I. australiensis, AM W.29125 with flattened, triangular median organ, eyespots present along median ridge; D. Idanthyrsus willora, scanning electron micrograph, with inconspicuous median organ.
FIGURE 4. Median organ, Lygdamis nasutus n in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 4. Median organ, Lygdamis nasutus n. sp., paratypes, AM W.44467. A. Lateral view with a close up of the eyespots along its length; B. Details of the distal tip, showing the flat corona; C. Distal end, showing teardrop coronal shape frontal view. D–G. SEM images, AM W.47750. D. Complete median organ, lateral view; E. Distal end, lateral view; F. Detail of the base of median organ with a few sparsely distributed ciliary tufts; G. Close up of ciliary tufts.
FIGURE 7. Chaetae, Lygdamis nasutus n in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 7. Chaetae, Lygdamis nasutus n. sp., paratypes, SEM images, AM W.44467. A. Anterior abdominal uncini with number of rows of teeth provided in one uncinus, close up of distal dentition; B. Detached uncini, with number of rows of teeth provided in one uncinus; C. Posterior abdominal uncini; D. Detail of posterior abdominal uncini; E. Abdominal notopodium; F. Detail of the two types of abdominal notochaetae; G. Posterior abdominal chaetiger and cauda.
FIGURE 1 in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 1. Gesaia sp. SEM images of larva, AM W.47551. A. Dorsal view; B. Dorsolateral view; C. Antero-ventral view; D. Detail of anterior regions showing median organ and palps, dorsal view; E. Same, ventral view; F. Inner row of paleae; G. Nuchal hooks and shafts of paleae from inner row; H. Parathoracic chaetigers, lateral view; I. Notochaetae of parathoracic chaetiger. Abbreviations: br = branchia, mo = median organ, pa = palp.
FIGURE 3. A–D. Lygdamis nasutus n in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 3. A–D. Lygdamis nasutus n. sp., holotype, AM W.47372, preserved. A. Operculum, thoracic and parathoracic chaetigers, lateral view; arrowheads point to notopodial cirri; B. Anterior end, ventral view; C. Same, dorsal view; D. Same, but with exposed well-developed median organ. E–F Paratype AM W.44467. E. Detail of median organ, dorsal view; F. Cross section of paratypes, showing half of the operculum with whole median organ. Abbreviations: br = branchia, bo = building organ, cn1 = cirrus neuropodia segment 1, chn1 = chaetae neuropodium segment 1, dc = dorsal cirrus, es = eyespots, ip = inner paleae, li = lips, m = mouth, mo = median organ, nh = nuchal hook, op = outer paleae, opa = opercular papillae, pa = palp, rtf = row of tentacular filaments, tf = tentacular filaments. Small arrow indicates conical dorsal cirrus. Photo: A–D—E. Wong.
FIGURE 2. Lygdamis nasutus n in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 2. Lygdamis nasutus n. sp., paratype, AM W.47750, live. A. Whole specimen, dorsal view, arrowheads point to notopodial cirri; B. Anterior end, lateral view, with median organ protruding from operculum (arrow); C. Anterior end, dorsal view; D. Operculum, frontal view; E. Posterior abdominal chaetigers and cauda, ventral view. Photos by A. Semenov.
FIGURE 6. Chaetae, Lygdamis nasutus n in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 6. Chaetae, Lygdamis nasutus n. sp., paratypes, SEM images, AM W.44467. A. Operculum, lateral view; B. Outer paleae; C. Thecal sculpture, outer paleae; D. Inner paleae; E. Close up of distal end, inner paleae; F. First thoracic neuropodial chaetae; G. Parathoracic notopodia; H. Parathoracic neuropodium. Abbreviations: cn1 = cirrus neuropodia segment 1, chn1 = chaetae neuropodium segment 1, ip = inner paleae, mo = median organ, nh = nuchal hook, op = outer paleae, opa = opercular papillae, pa = palp.
FIGURE 5. Chaetae, Lygdamis nasutus n in Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ
FIGURE 5. Chaetae, Lygdamis nasutus n. sp., paratypes. A. Outer paleae; B. Detail of tips of outer paleae; C. Inner paleae, distal end; D. Notopodium, parathoracic chaetiger; E. Detail of tips of lanceolate parathoracic notopodial chaeta; F. Parathoracic notopodial simple capillaries, interspersed with lanceolate chaetae; G. Neuropodium, parathoracic chaetiger; H. Detail of tips of lanceolate parathoracic neuropodial chaetae; I. Parathoracic neuropodial simple capillaries, interspersed with lanceolate chaetae; J. Abdominal notochaetae (two types); K. Neuropodial abdominal uncini; L. Detail of abdominal uncinus, side view.
FIGURE 3. Sabellaria nanella Chamberlin, 1979 in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 3. Sabellaria nanella Chamberlin, 1979 (POLY 292): (A) outer palea; (B) middle palea; (C) inner palea. Scale bars: A–C, 0.1 mm.
FIGURE 6. Sabellaria guamare n in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 6. Sabellaria guamare n. sp., holotype (CIPY-POLY 1689) (A) body in ventro-lateral view; (B) body in dorsal-lateral view; (C) opercular peduncle. Paratype, (CIPY-POLY 1690) (D) ventral view without tentacles; (E) medium organ in peduncle; (F) detail of medium organ. Legends: ABS, abdominal segment; BR, branchia; BO, building organ; FT, compound feeding tentacles; MO, medium organ; VP, ventral pads. Scale bars: A–C, 5 mm; D and E, 2 mm; F, 0.5 mm.
FIGURE 2. Lygdamis rayrobertsi Kirtley, 1994 in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 2. Lygdamis rayrobertsi Kirtley, 1994 (POLY 00291): (A) Body in ventro-lateral view; (B) Body in dorso-lateral view. Scale bars: A–B, 1 mm.
FIGURE 5. Sabellaria guamare n in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 5. Sabellaria guamare n. sp., holotype (CIPY-POLY 1689) (A) body in ventro-lateral; (B) body in dorso-lateral view; (C) opercular peduncle; (D) detail of opercular peduncle; (E) abdominal region showing the stomach; (F)posterior region. Legends: BR, branchia; BO, building organ, FT, compound feeding tentacles; NH, Nuchal hooks; OP, opercular peduncle; PA, parathoracic region; PI, pygidium; ST, stomach; TH, thorax; TO, tori;. Scale bars, A–C, E and F, 5 mm; D, 1 mm.
FIGURE 8. Sabellaria guamare n in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 8. Sabellaria guamare n. sp.,paratype (CIPY-POLY 1710). (A) medium paleae; (B) detail of medium paleae; (C) inner series; (D) detail of inner paleae. Scale bars: A, 0.1 mm; B, 0.02 mm; C, 0.1 mm; D, 0.01 mm.
FIGURE 7. Sabellaria guamare n in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 7. Sabellaria guamare n. sp., holotype (CIPY-POLY 1689) (A) outer palea; (B) medium paleae; (C)inner paleae; (D) nuchal hooks; (E) thoracic chaeta; (F) lanceolate notopodial pharathoracic chaeta; (G) spiralete notopodial parathoraic chaeta; (H) lanceolate neuropodial pharathoraic chaeta; (I) spiralete neuropodial pharathoraic chaeta; (J) neuropodial abdominal chaeta; (K) dorso-lateral view; (L) nototopodial abdominal chaeta (M) ventro-lateral view. Scale bars: A, 0.1 mm; B, 0.1 mm; C, 0.1 mm; D, 0.3 mm; E, 0.1 mm; F, 0.3 mm; G, 0.3mm; H, 0.03 mm; I, 0.03 mm; J, 0.1 mm; L, 0.03mm; K, 5 mm; M, 5 mm. Legends: BR, branchia; CO, crown; CP, paired cirrus; O, eyespots; BO, building organ; PE, peduncle; PG, pygidium; PR, parapodium; PT, pharathoracic region; TO, thoracic region; UN, uncini.
FIGURE 4 in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 4. Sabellaria wilsoni Lana & Gruet, 1989 (POLY 302): (A) outer palea; (B) middle palea; (C) inner palea. Scale bars: A–C, 0.1 mm.
FIGURE 1 in Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria
FIGURE 1. Map of the Guamaré Bay and sampling stations.
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