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13 results for “Ophidiaster”
Figure 3 in A revision of Ophidiaster davidsoni de Loriol and Pellat 1874 from the Tithonian of Boulogne (France) and its transfer from the Valvatacea to the new forcipulatacean genus Psammaster gen. nov.
Figure 3. Arrangement of the body wall and arm ossicles of Psammaster davidsoni (a, b, c, d) and the ambulacral groove (e, f). Photographs (a, c, e) and interpretation drawings (b, d, f) of the lectotype NHMUK PI E 53996. Dashed lines indicate uncertain contour of the ossicles. Coloured areas indicate ossicle homology. In orange: the central ossicle; in red: the madreporite; in green: carinals; in pink: abactinals; in blue: superomarginals; in yellow: inferomarginals; in brown: actinals; in grey: ambulacrals; in purple: adambulacrals; in teal: adambulacrals spines. Scale bars: 5 mm.
Figure 2 in A revision of Ophidiaster davidsoni de Loriol and Pellat 1874 from the Tithonian of Boulogne (France) and its transfer from the Valvatacea to the new forcipulatacean genus Psammaster gen. nov.
Figure 2. Disc of the lectotype NHMUK PI E 53996, (a) photography and (b) interpretation drawing. Dashed lines indicate uncertain contour of the ossicles. Coloured areas indicate ossicle homology. Orange: the central; red: the madreporite; light green: carinals; dark green: primary radials; light blue: superomarginals; dark blue: primary interradials; pink: abactinals. Scale bars: 5 mm.
Figure 1 in A revision of Ophidiaster davidsoni de Loriol and Pellat 1874 from the Tithonian of Boulogne (France) and its transfer from the Valvatacea to the new forcipulatacean genus Psammaster gen. nov.
Figure 1. The lectotype NHMUK PI E 53996, in (a) abactinal and (b) actinal views, and (c, d) the paralectotype NHMUK PI E 1499, representing at least two individuals preserved as three separate elements, (c) NHMUK PI E 1499 i, and (d) NHMUK PI E 1499 ii and iii. Scale bars: 1 cm.
Figure 4 in A revision of Ophidiaster davidsoni de Loriol and Pellat 1874 from the Tithonian of Boulogne (France) and its transfer from the Valvatacea to the new forcipulatacean genus Psammaster gen. nov.
Figure 4. Strict consensus of the 61 most parsimonious trees found. Character matrix from Fau and Villier (2020) is available in the Supplement. Asteriidae (n = 12 taxa) and Zoroasteridae (n = 4 taxa) were grouped for clarity.
FIGURE 37. Linckia and Ophidiaster armatus A in New Ecological Observations and Occurrence for Asteroidea and Echinoidea in Hong Kong
FIGURE 37. Linckia and Ophidiaster armatus A. In situ observation, O. armatus abactinal surface. B. Six rayed variant of O. armatus from Ninepin Islands, Hong Kong. C. In situ observation of L. laevigata. Photographer: A and C: Sam King Fung Yiu; B: Max Leung.
Figure 6. Transverse sections through a in Foregut anatomy and predation by Charonia lampas (Gastropoda: Prosobranchia: Neotaenioglossa) attacking Ophidiaster ophidianus (Asteroidea: Ophidiasteridae) in the Açores, with a review of triton feeding behaviour
Figure 6. Transverse sections through a single acinus of the posterior salivary glands of (A) Charonia lampas and (B) Gyrineum natator.
Figure 5 in Foregut anatomy and predation by Charonia lampas (Gastropoda: Prosobranchia: Neotaenioglossa) attacking Ophidiaster ophidianus (Asteroidea: Ophidiasteridae) in the Açores, with a review of triton feeding behaviour
Figure 5. Charonia lampas. (A) A detail of the salivary glands and their duct system after being turned to the left through 180◦; (B) a row of teeth that make up the taenioglossan radula; (C) the paired jaws at the entrance to the mouth.
Figure 3 in Foregut anatomy and predation by Charonia lampas (Gastropoda: Prosobranchia: Neotaenioglossa) attacking Ophidiaster ophidianus (Asteroidea: Ophidiasteridae) in the Açores, with a review of triton feeding behaviour
Figure 3. Charonia lampas. Faeces produced after consuming an autotomised arm of Ophidiaster ophidianus. (A) Phase 1, after consumption of the tube feet, coelomic tube feet ampullae, pyloric caecae and gonads. (B) Phase 2, after consumption of the exoskeleton.
Figure 4 in Foregut anatomy and predation by Charonia lampas (Gastropoda: Prosobranchia: Neotaenioglossa) attacking Ophidiaster ophidianus (Asteroidea: Ophidiasteridae) in the Açores, with a review of triton feeding behaviour
Figure 4. Charonia lampas. The foregut anatomy of the preserved specimen obtained from Spain, and as seen from the dorsal aspect.
Figure 2 in Foregut anatomy and predation by Charonia lampas (Gastropoda: Prosobranchia: Neotaenioglossa) attacking Ophidiaster ophidianus (Asteroidea: Ophidiasteridae) in the Açores, with a review of triton feeding behaviour
Figure 2. Charonia lampas consuming an autotomised arm of Ophidiaster ophidianus. (A, B) Phase 1, consumption of the tube feet (A); consumption of the coelomic tube feet ampullae, pyloric caecae and gonads (B). (C, D) Phase 2, consumption of the exoskeleton.
Figure 1 in Foregut anatomy and predation by Charonia lampas (Gastropoda: Prosobranchia: Neotaenioglossa) attacking Ophidiaster ophidianus (Asteroidea: Ophidiasteridae) in the Açores, with a review of triton feeding behaviour
Figure 1. Charonia lampas attacking Ophidiaster ophidianus. (A) Charonia lampas pursues its potential prey and "taps" it with its tentacles. Ophidiaster ophidianus attempts to flee. (B) Charonia lampas captures one of the prey arms, which is instantly autotomised. Ophidiaster ophidianus makes its escape after leaving behind the arm, which autotomised further into two pieces.
FIGURE 6. Ophidiaster guildingi Gray, 1840. A in Asteroidea (Echinodermata) from shallow-waters of the remote oceanic archipelago Trindade and Martin Vaz, southeastern Atlantic, with taxonomic and zoogeographical notes
FIGURE 6. Ophidiaster guildingi Gray, 1840. A. Specimen from Trindade Island photographed in situ (MZUSP 1560). B–I. MZUSP 1580: B, C. Abactinal and actinal views. D. Abactinal plates and papulae. E. Detail of the madreporite. F. Mouth. G. Ambulacral spines. H. Tip of the arm, abactinal view. J–O. Scanning electron microscope (MZUSP 1570). J, K. Ambulacral plates. L–N. Abactinal plates. O. Oral plate. Scale bars: B–C, 10 mm; D–I, 1 mm; J–O, 200 μm.
FIGURE 18. Ophidiaster guildingi and Solaster spp. A. O in New species, occurrence records and observations of predation by deep-sea Asteroidea (Echinodermata) from the North Atlantic by NOAA ship Okeanos Explorer
FIGURE 18. Ophidiaster guildingi and Solaster spp. A. O. guildingi on large sponge. South of Okeanos Ridge, Gulf of Mexico, 424 m. B. O. guildingi on encrusting organisms. South of Okeanos Ridge, Gulf of Mexico, 25.60506 -84.55012, 480 m C. O. guildingi with arm on sponge. Stetson Mesa Terrace, 445 m. D. O. guildingi feeding on cup corals. South of Okeanos Ridge, Gulf of Mexico, 435 m. E. Orange species with crab associate (enlarged inset). Pamlico Canyon Ridge, North Atlantic 1587 m F. White species. Richardson's Jellyfish, 846 m.
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