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343 results for “Brittle stars”
FIGURE 3 in New brittlestars (Echinodermata: Ophiuroidea) from New Zealand waters
FIGURE 3: Amphiophiura bakeri n.sp. holotype, disc diameter 9.5 mm. A: dorsal, B: ventral; paratype, C: dorsal (SEM), D: ventral (SEM). Ophiura (Ophiuroglypha) verrucosa n.sp. holotype, disc diameter 17 mm, E: dorsal, F: ventral.
FIGURE 6 in New brittlestars (Echinodermata: Ophiuroidea) from New Zealand waters
FIGURE 6: Ophiura (Dictenophiura) spinicantha n.sp. holotype, disc diameter 16 mm. A: dorsal, B: ventral, E: armbase. Ophiura (Dictenophiura) platyacantha n.sp. holotype, disc diameter 14 mm., C: dorsal, D: ventral, F: armbase.
FIGURE 2 in New brittlestars (Echinodermata: Ophiuroidea) from New Zealand waters
FIGURE 2: Renetheo felli n.gen. et sp. holotype, disc diameter 1.2 mm. A: dorsal, B: ventral, C: cleaned vertebra (SEM), D: oral region (SEM).
FIGURE 5 in New brittlestars (Echinodermata: Ophiuroidea) from New Zealand waters
FIGURE 5: Ophiocten cryptum n.sp. holotype, disc diameter 7.5 mm. A: dorsal, B: ventral. Ophiomidas aurum, n.sp. holotype, disc diameter 4.5 mm. C: dorsal, D: ventral. Ophiophyllum teplium n.sp, holotype, disc diameter 7 mm. E: dorsal, F: ventral.
FIGURE 1 in New brittlestars (Echinodermata: Ophiuroidea) from New Zealand waters
FIGURE 1: Ophiolebes comatulina n.sp. holotype, disc diameter 5 mm. A: dorsal, B: ventral. Ophiolycus farquhari n.sp. disc diameter 6 mm. C: dorsal, D: ventral. Ophiolepis biscalata n.sp. holotype, disc diameter 16 mm. E: dorsal, F: ventral.
FIGURE 3 in Brittle stars (Echinodermata: Ophiuroidea) from the southern coast of Turkey (eastern Mediterranean): new records and revision of Amphiodia obtecta Mortensen, 1940
FIGURE 3. Seasonal variation of density and biomass of Amphiodia obtecta in Mersin Bay, southern Turkey, eastern Mediterranean Sea.
FIGURE 1 in Brittle stars (Echinodermata: Ophiuroidea) from the southern coast of Turkey (eastern Mediterranean): new records and revision of Amphiodia obtecta Mortensen, 1940
FIGURE 1. Collecting stations in southern Turkey, eastern Mediterranean Sea. Station numbers preceded by D refer to collecting by anchor dredge, those marked with G to collecting by Van Veen Grab and those marked with K refer to snorkelling.
FIGURE 2. A–G in Brittle stars (Echinodermata: Ophiuroidea) from the southern coast of Turkey (eastern Mediterranean): new records and revision of Amphiodia obtecta Mortensen, 1940
FIGURE 2. A–G, Amphiodia obtecta, SEM images. A, dorsal aspect; B, spiny marginal scales; C, distal radial spiny digits; D, ventral aspect; E, dorsal arm; F, ventral arm; G, tentacle scale. H, I, Ophiophragmus duplicatus Koehler, 1930, syntype, digital images. H, dorsal aspect, note the large marginal scales; I, ventral aspect. AS, adoral shield; DAP, dorsal arm plate; MS, marginal spines; OS, oral shield; RD, radial digit; RS, radial shield; TS, tentacle scale; VAP, ventral arm plate. Scale bars in millimetre.
FIGURE 11 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 11. Amphicutis stygobita gen. nov., sp. nov. Examples of lack of arm calcification (photos in A by Jerry Carpenter; B and C by Chris Pomory). A, live animals. B, paratype 2, arm section in ethanol before drying. C, same as B after drying. Black arrows point to calcified skeleton edge. White arrows point to soft tissue outlining arms.
FIGURE 10 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 10. Amphicutis stygobita gen. nov., sp. nov. Paratype 4, disk and arms (photos by Chris Pomory). A, ventral view arm near disk. B, dorsal view arm near disk. C, ventral view arm segments on disk and interbrachial area. D, dorsal view disk near arm connection (rs: radial shields; disk diameter 3.8 mm). E, internal view dorsal aspect disk after dissection/removal of dorsal disk surface (dp: dental plate; 9m: madreporite). Numbers for A & B as in Fig. 6. Numbers for C & E as in Fig. 5.
FIGURE 9 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 9. Amphicutis stygobita gen. nov., sp. nov. Paratype 3, disk and arms (photos by Chris Pomory). A, dorsal view disk near center (disk diameter 3.3 mm). B, ventral view disk mouth area. C, lateral view arms. D, ventral view disk centered on adoral shields. Numbers as in Fig. 5. Note lack of calcification of scales, plates, and papillae.
FIGURE 8 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 8. Amphicutis stygobita gen. nov., sp. nov. Paratype 2, disk (photos by Chris Pomory). A, dorsal view near center (disk diameter 3.8 mm). B, ventral view mouth area. C, ventral view centered on adoral shields. Numbers as in Fig. 5. Note lack of calcification of scales, plates, and papillae.
FIGURE 6 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 6. Amphicutis stygobita gen. nov., sp. nov. Holotype, arms (photos by Chris Pomory). A, ventral view near disk. B, dorsal view near disk. C, lateral view arm tip. D, ventral view arm tip. 1. one large oval tentacle scale per pore; 2. enlarged lateral arm plates; 3. skin; 4. two arm spines per lateral arm plate; 5. figure-8 shaped ventral arm plates; 6. large tube foot with knobbed end; 7. diamond-oval shaped dorsal arm plates; 8. terminal arm plate.
FIGURE 7 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 7. Amphicutis stygobita gen. nov., sp. nov. Paratype 1, disk and arms (photos by Chris Pomory). A, dorsal view disk near arm connection (rs: radial shields; disk diameter 3.8 mm). B, ventral view arm. C, dorsal view arm. D, ventral view arm tip. E, ventral view disk centered on adoral shields (9m: madreporite). Numbers for B, C, & D as in Fig. 6. Numbers for E as in Fig. 5.
FIGURE 4 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 4. Amphicutis stygobita gen. nov., sp. nov. Holotype, dorsal view (photos in A and B by Jerry Carpenter; C by Chris Pomory). A, whole animal showing disk/arm length ratio. B, disk surface. C, radial shields. 1. 8–9 rows of disk scales disk center to disk edge; 2. radial shields.
FIGURE 3 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 3. Amphicutis stygobita gen. nov., sp. nov. A, dorsal view disk. B, ventral view disk. C, ventral view arm. D, dorsal view arm. E, side view arm. F, dorsal view arm tip.
FIGURE 2 in Amphicutis stygobita, a new genus and new species of brittle star (Echinodermata: Ophiuroidea: Ophiurida: Amphilepididae) found in Bernier Cave, an anchialine cave on San Salvador Island, Bahamas
FIGURE 2. Habitat of Amphicutis stygobita gen. nov., sp. nov. from Bernier Cave, an anchialine cave on San Salvador Island, Bahamas (photos by Jerry Carpenter). A, John Winter sitting on cave floor next to a Pigeon Plum tree, Coccoloba diversifolia, growing through the entrance in the cave ceiling. B, water level in entrance chamber of cave. C, in situ photograph of an individual of A. stygobita, disk diameter ~4 mm.
FIGURE 1 in Sometimes two arms are enough—an unusual life-stage in brittle stars (Echinodermata: Ophiuroidea)
FIGURE 1. Morphology of Amphiura ungulata, adults. (A) dorsal disc, (B) radial shields, (C) arm dorsolaterally with spines, (D) ventral aspect, disc lost, (E) oral frame, (F) ventral arm. M, madreporite. SEM images, scale bars in millimetre.
FIGURE 2 in Sometimes two arms are enough—an unusual life-stage in brittle stars (Echinodermata: Ophiuroidea)
FIGURE 2. Morphology of Amphiura ungulata, juveniles. (A) elongated dorsal disc, lacking primary plates, (B) dorsal arm, (C) ventral overview, (D) oral frame and pattern of arms, note the terminal plates of three undeveloped arms marked by arrows, (E) ventral arm, (F) hoof-shaped spines, (G) specimen with possible madreporite, (H–J) the three underdeveloped arms are growing in larger juveniles. M, madreporite, TP, terminal plate. Scale bars in millimetre. SEM images except O, P.
FIGURE 25 in Lateral arm plate morphology in brittle stars (Echinodermata: Ophiuroidea): new perspectives for ophiuroid micropalaeontology and classification
FIGURE 25. Lateral arm plates (LAPs) in external (a) and internal (b) views. Ophioplinthus brevirima, 1: proximal LAPs; 2: median LAPs; 3: distal LAPs. Ophioplinthus gelida, 4: proximal LAPs; 5: median LAPs; 6: distal LAPs. Ophioplinthus martensi, 7: proximal LAPs; 8: median LAPs; 9: distal LAPs.
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