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105 results for “ophiuroids”
FIGURE 6 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 6. Lateral arm plates (LAPs) in external (a) and internal (b) views of one adult specimen of Ophiura sarsii from Toyama Bay, Japan, and three different growth stages of Ophiura sarsii from off Iceland. 1–2: proximal (1) and median (2) LAPs of adult specimen from Japan; 3–4: proximal (3) and median (4) LAPs of adult specimen from off Iceland, dd=12,5 mm; 5–6: proximal (5) and median (6) LAPs of juvenile specimen from off Iceland, dd=7,8 mm; 7–8: proximal (7) and median (8) LAPs of juvenile specimen from off Iceland, dd=2,5 mm. dd: disc diameter.
FIGURE 24 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 24. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophiochiton fastigatus, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophioplocus imbricatus, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophiomusium lymani, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
FIGURE 21 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 21. Lateral arm plates (LAPs) in external (a) and internal (b) views, with detail of tubercles on outer surface (c). Ophiolepis cincta, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophiolepis elegans, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophiolepis variegata, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs. Scale bars for 1c, 4c and 7c equal 100 µm.
FIGURE 5 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 5. Lateral arm plates (LAPs) in external (a) and internal (b) views of three different growth stages of Ophiacantha fraterna. 1–3: proximal (1), median (2) and distal (3) LAPs of adult specimen, dd=7,6 mm; 4–6: proximal (4), median (5) and distal (6) LAPs of juvenile specimen, dd=5,1 mm; 7–9: proximal (7), median (8) and distal (9) LAPs of juvenile specimen, dd=3,8mm. dd: disc diameter.
FIGURE 11 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 11. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophiocoma erinaceus, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophiocoma scolopendrina, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Amphiura belgicae, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
FIGURE 3 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 3. Height:width ratio of proximal lateral arm plates (extracted from 10th segment counted from first real arm segment incorporated into the disk) of Ophiacantha bidentata plotted against disc diameter.
FIGURE 2 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 2. Proximal lateral arm plates in external (a) and internal (b) views of eight adult, similarly sized specimens of Ophiacantha bidentata, each from the tenth arm segment. 1: dd=9.8 mm; 2: dd=12.7 mm; 3: dd=10.4 mm; 4: dd=10.2 mm; 5: dd=9.7 mm; 6: dd=10.2 mm; 7: dd=12 mm; 8: dd=12 mm. Scale bar equals 1 mm; dd: disc diameter.
FIGURE 1 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 1. Proximal lateral arm plates of Ophioderma appressa in external (left) and internal (right) views to show the orientations (d: dorsal, dp: dorso-proximal, p: proximal, vp: ventro-proximal, v: ventral, vdi: ventro-distal, di: distal, ddi: dorso-distal) and characters (K: knob on inner side, P: perforation on inner side, R: ridge on inner side, SA: spine articulations, SP: spurs on outer proximal and inner distal edges, TN: tentacle notch) used in this study.
FIGURE 7 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 7. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophiolimna bairdi, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophiacantha abyssicola, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophiacantha setosa, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
FIGURE 15 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 15. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophiocten affinis, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophiocten gracilis, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophiocten sericeum, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
FIGURE 4 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 4. Lateral arm plates (LAPs) in external (a) and internal (b) views of four adult, similarly sized specimens of Ophiocten gracilis. 1: proximal LAPs, dd=9.7 mm; 2: median LAPs, same specimen as on 1; 3: proximal LAPs, dd=8.1 mm; 4: median LAPs, same specimen as on 3; 5: proximal LAPs, dd=9.3 mm; 6: median LAPs, same specimen as on 5; 7: proximal LAPs, dd=8.6 mm; 8: median LAPs, same specimen as on 7. dd: disc diameter.
FIGURE 19 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 19. Median arm segments of Ophiura robusta in lateral view showing proximalmost arm spine transformed into a hook (A) and detail of a hook-shaped arm spine (B).
FIGURE 20 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 20. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophiopallas brevispina, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophiopallas paradoxa, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophiopallas valens, 7: proximal LAPs; 8: median LAPs.
FIGURE 23 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 23. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophiomyxa pentagona, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophiolycus purpureus, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophioscolex glacialis, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
FIGURE 22 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 22. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophioderma appressa, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophioderma longicauda, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophioderma panamensis, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
FIGURE 12 in Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Cadiz (NE Atlantic)
FIGURE 12. Bathymetric ranges of the ophiuroid species collected in the Gulf of Cadiz. Undetermined specimens (Ophiuroidea und., Amphiuridae und. and Amphiura und.) were mostly juveniles or damaged specimens. Black bars: depth ranges in the Gulf of Cadiz from the present study; White bars: previously known depth range; Striped bars: extended depth range by the records of the present study.
FIGURE 5 in Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Cadiz (NE Atlantic)
FIGURE 5. Ophiopristis gadensis sp. nov. A–B: ventral view of adult (disk diameter: 9.5 mm), b) oral frame of juvenile specimen (disk diameter: 3.5 mm), c) disk spinelets, d) ventralmost spine from distal arm segment, e) mid arm spine f) arm dorsally spine. Bar scales = 1 mm.
FIGURE 8. Amphipholis squamata. A, B, C, F in Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Cadiz (NE Atlantic)
FIGURE 8. Amphipholis squamata. A, B, C, F: ventral aspect; D, I: dorsal aspect; E, H: arm ventrally; I: arm dorsally. A, B: specimen 1; C, D, E: specimen 2; F, G, H, I: specimen 3. All specimens were collected at the same location (TTR mud volcano).
FIGURE 4 in Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Cadiz (NE Atlantic)
FIGURE 4. Ophiopristis gadensis sp. nov. (Paratype). A–B: ventral aspect, C: jaw detail, D: dorsal aspect; E–F: dorsal radial shield; G: disk spinelets; H: arm ventrally; I: arm ventrally and tentacle scale; J: outer arm ventrally; K: arm dorsally spines; L: detail of arm dorsally and spines. AS, adoral shield; DAP, dorsal arm plate; LAP, lateral arm plate; OP, oral papillae; OS, oral shield; S, spinelet; TS, tentacle scale; VAP, ventral arm plate.
FIGURE 1 in Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Cadiz (NE Atlantic)
FIGURE 1. Map of the study area (Gulf of Cadiz) and location of sampling sites. Full circles: sampling sites with Ophiuroidea; Empty circles: other sites; AI: Al Idrisi MV; CA: Captain Arutyunov MV; CC: carbonate chimneys West of Gibraltar Strait; CR: Carlos Ribeiro MV; Che: Chechaouen MV; Dar: Darwin MV; Fiu: Fiúza MV, FR: Formosa Ridge; Gin: Ginsburg MV; JB: Jesus Baraza MV; Kid: Kidd MV; Mer: Mercator MV; Mek: Meknès MV; PDE: Pen Duick Escarpment; Por: Porto MV; TTR: TTR MV; VR: Vernadsky ridge; Yum: Yuma MV.
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