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343 results for “Brittle stars”
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 5 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 5. Maximum likelihood tree of the species analysed in this study. (a) COI; (b) 16S. Values at branches indicate bootstrap values (maximum likelihood/neighbour-joining); asterisks indicate specimens of Ophioderma occultum sp. nov. previously identified as Ophioderma panamense. Sequences obtained in this study are indicated in bold. See the Supplemental material for more information.
Figure 4 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 4. Some morphological characters of Eastern Pacific Ophioderma that differ from those of Ophioderma occultum sp. nov. Ophioderma hendleri (holotype: ICML-UNAM 18315, DD = 14.8 mm): (a) close-up of a jaw; (b) dorsal arm. Ophioderma panamense (holotype: NHMD-107679, DD = 21.9 mm): (c) portion of dorsal disc and arm. Ophioderma pentacanthum (paratype: MCZ OPH-4519,
Figure 3 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 3. Morphological variations recorded in Ophioderma occultum sp. nov. (a) Disc with partially uncovered radial shields (arrowheads; CE-UAM 390, DD = 15.4 mm); (b) white-spotted oral shields (paratype: ICML-EMU 12868, DD = 19.9 mm); (c) white oral shields (CE-UAM 214, DD = 7.3 mm); (d) granules on the proximalmost DAPs (ICML-UNAM 11593, DD = 26.7 mm); (e) arm segment with three tentacle scales (arrowhead; paratype: ICML-UNAM 18430, DD = 17.2 mm); (f) abnormal arm spines (arrowheads; CE-UAM 679, DD = 16.3 mm); (g) brown-coloured specimen (CE-UAM 673, DD = 23.5 mm); (h–i) in vivo colouration (Photographs: M.A. Medina-López).
Figure 2 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 2. Ophioderma occultum sp. nov., paratype (ICML-UNAM 18430, DD = 3.7 mm). (a) Dorsal disc; (b) ventral disc (insert: jaw with the partially uncovered oral shield); (c) close-up of a jaw; (d–f) dorsal arm (proximalmost, median, distalmost); (g–i) ventral arm (proximalmost, median, distalmost); (j) lateral arm plates and arm spines; (k) dorsal view. 2°AdShSp, secondary adoral shield spine; AdShSp, adoral shield spine; IPa, infradental papilla; LOPas, lateral oral papillae; LyOs, Lyman's ossicle; TPa, tooth papilla; vT, ventralmost tooth.
Figure 1 in Overlooked for over a century: Ophioderma occultum sp. nov. (Echinodermata), a new species of brittle star from the Eastern Pacific
Figure 1. Ophioderma occultum sp. nov., holotype (ICML-UNAM 18429, DD = 15.9 mm). (a) Dorsal disc; (b) ventral disc; (c) close-up of a jaw; (d–f) dorsal arm (proximalmost, median, distalmost); (g–i) ventral arm (proximalmost, median, distalmost); (j) lateral arm plates and arm spines; (k) dorsal view. 2° AdShSp, secondary adoral shield spine; AdShSp, adoral shield spine; IPa, infradental papilla; LOPas, lateral oral papillae; LyOs, Lyman's ossicle; TPa, tooth papilla; vT, ventralmost tooth.
Supplementary material 3 from: Okanishi M, Fujita T, Maekawa Y, Sasaki T (2017) Non-destructive morphological observations of the fleshy brittle star, Asteronyx loveni using micro-computed tomography (Echinodermata, Ophiuroidea, Euryalida). ZooKeys 663: 1-19. https://doi.org/10.3897/zookeys.663.11413
Figure S3 : Explanation note: The interactive 3D model of µ CT surface rendering images of the isolated vertebral ossicles of Asteronyx loveni (NSMT E-5638).
Supplementary material 2 from: Okanishi M, Fujita T, Maekawa Y, Sasaki T (2017) Non-destructive morphological observations of the fleshy brittle star, Asteronyx loveni using micro-computed tomography (Echinodermata, Ophiuroidea, Euryalida). ZooKeys 663: 1-19. https://doi.org/10.3897/zookeys.663.11413
Figure S2 : Explanation note: The interactive 3D model of µ CT surface rendering images of the basal part of an arm of Asteronyx loveni (NSMT E-5638).
Supplementary material 1 from: Okanishi M, Fujita T, Maekawa Y, Sasaki T (2017) Non-destructive morphological observations of the fleshy brittle star, Asteronyx loveni using micro-computed tomography (Echinodermata, Ophiuroidea, Euryalida). ZooKeys 663: 1-19. https://doi.org/10.3897/zookeys.663.11413
Figure S1 : Explanation note: The interactive 3D model of µ CT surface rendering images of the entire body of Asteronyx loveni (NSMT E-6986). This image can be activated by clicking on the image in Adobe Acrobat Reader (version 8 or higher) and can be rotated, moved and magnified.
Supplemental datasets for the brittle star A. filiformis genome
<p>This repository stores the supplemental datasets for the brittle star <i>Amphiura filiformis</i> genome manuscript.</p>
FIGURE 9. Ophiozonella cavernalis n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 9. Ophiozonella cavernalis n. sp. holotype (RUMF-ZE-02008). A, aboral proximal portion of arm; B, aboral middle portion of arm; C, aboral distal tip of arm; D, oral proximal portion of arm; E, oral middle portion of arm; F, oral distal tip of arm; G, lateral middle portion of arm; H, lateral distal tip of arm. Arrow heads indicate tentacle scale. Abbreviation: ASP, arm spine; DAP, dorsal arm plate; LAP, lateral arm plate; VAP, ventral arm plate.
FIGURE 6. Ophiolepis cavitata n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 6. Ophiolepis cavitata n. sp. a paratype (RUMF-ZE-02007). SEM images of ossicles. A–C, vertebrae, from proximal portion of arms, proximal view (A), distal view, one oral flange has broken off (B), aboral view (C); D–G, vertebrae, from distal portion of arms, proximal view (D), distal view (E), oral view (F) and aboral view (G); H, I, oral most arm spines, from proximal portion of arms (H), distal portion of arms (I). Orientations: ab, aboral side; dis, distal side; o, oral side; pro, proximal side. Abbreviations: AF, aboral muscle flange; D, depression for tentacle; OF, oral muscle flange; RWC, radial water canal.
FIGURE 4. Ophiolepis cavitata n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 4. Ophiolepis cavitata n. sp. holotype (RUMF-ZE-02006). A, aboral middle portion of arm; B, aboral distal tip of arm; C, oral middle portion of arm; D, oral distal tip of arm; E, lateral middle portion of arm; F, lateral distal tip of arm. Abbreviation: ASP, arm spine; DAP, dorsal arm plate; LAP, lateral arm plate: VAP, ventral arm plate.
FIGURE 3. Ophiolepis cavitata n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 3. Ophiolepis cavitata n. sp. holotype (RUMF-ZE-02006). A, aboral disc; B, aboral peripheral disc and proximal portion of arm; C, aboral central disc; D, oral disc and proximal portion of arms; E, oral disc, an arrow head indicates a concaved part; F, interradial oral disc; G, oral proximal portion of arm, arrowheads indicate tentacle scales; H, aboral proximal portion of arm. Abbreviations: ASH, adoral shield; ASP, arm spine; DAP, dorsal arm plate; GS, genital slit; K, dorsal knob; LAP, lateral arm plate; OP, oral plate; OS, oral shield; P, oral papillae; SP, supplementary plate; T, tooth.
FIGURE 2. Ophiolepis cavitata n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 2. Ophiolepis cavitata n. sp., living holotype (RUMF-ZE-02006). A, in situ, aboral view; B, anesthetized, aboral view; C, anesthetized, oral view.
FIGURE 11. Ophiozonella cavernalis n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 11. Ophiozonella cavernalis n. sp. a paratype (RUMF-ZE-02009). SEM images of ossicles. A–E, vertebrae, from proximal portion of arms, proximal view (A), distal view (B), aboral view (C) and oral view (D), a square enlarged from D (E); F–H, vertebrae, from distal portion of arms, proximal view (F), distal view (G) and oral view (H); I–K, arm spines, from proximal portion of arms (I), distal portion of arms, inner (J) and outer (K) spines. Orientations: ab, aboral side; dis, distal side; o, oral side; pro, proximal. Abbreviations: AF, aboral muscle flange; D, depression for tentacle; OF, oral muscle flange; RWC, radial water canal; ST, secondary tooth.
FIGURE 5. Ophiolepis cavitata n in First finding of anchialine and submarine cave dwelling brittle stars from the Pacific Ocean, with descriptions of new species of Ophiolepis and Ophiozonella (Echinodermata: Ophiuroidea: Amphilepidida)
FIGURE 5. Ophiolepis cavitata n. sp. a paratype (RUMF-ZE-02007). SEM images of ossicles. A, B, dorsal arm plates, aboral views, from proximal portion (A) and middle portion of arm (B); C–F, lateral arm plates, from proximal portion of arms, inner view (D), outer view, distal view, a square enlarged in F (E), an arm spine articulation (F); G–J, lateral arm plates, from distal portion of arms, outer view (G), inner view (H), distal view, a square enlarged in J (I), an arm spine articulation (J); K, L, ventral arm plates, inner views from proximal portion (K) and distal portion (L) of arms. All lateral arm plates (C–J) are aligned in the same orientation. Orientations: ab, aboral side; dis, distal side; o, oral side; pro, proximal. Abbreviations: DL, dorsal lobe; E, elevated structure; K, dorsal knob; P, perforation; SA, spine articulation; SP, spur; VL, ventral lobe.
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