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209 results for “scanning electron microscopy”
FIGURE 8. Parellisina sileni Osburn, 1949 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 8. Parellisina sileni Osburn, 1949. Holotype SMNH-Type-3081, Japan. A. General view of the colony encrusting a rock. B. Ancestrula, seemingly tatiform with at least seven countable spine bases (see white arrows) and early astogeny. Two distolateral spine bases usually visible on periancestrular autozooids (see black arrows). C. Group of ovicellate zooids with complete or incomplete ooecia and an avicularium. Arrows point to preserved circumopesial spine bases. D. Close-up of an ooecium and an autozooid without the frontal membrane showing the beaded cryptocyst, the opesia and spine bases, one placed proximolaterally and the other distolaterally (see arrows). E. Close-up of an ovicellate zooid with frontal membrane and distolateral spine bases flanking the ooecium. F. Close-up of an autozooid with the frontal membrane and open operculum showing the outline of the orifice, and two avicularia with the falciform mandibles mirroring the shape of the rostrum. G. Closeup of an avicularium with the associated kenozooid. H. Avicularia with open mandibles showing the elliptical opesia and robust, triangular condyles almost touching, and the autozooids at colony edge showing the distal pore-chamber window and a broken ooecium. I. Broken autozooids showing the lateral uniporous septula (see arrows) for autozooidal communication. Scale bars: A = 1 mm; B, C, D = 200 µm; E, F, G = 150 µm; H, I = 250 µm.
FIGURE 16. Heliodoma implicata Calvet, 1907. North Atlantic Ocean, Azores. A–D. SMNH-127828. A in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 16. Heliodoma implicata Calvet, 1907. North Atlantic Ocean, Azores. A–D. SMNH-127828. A. General view of a colony with frontal membranes, opercula and setae. B. Close-up of the ancestrula and first generation of autozooids, with closure plates, and vibracula budded in a spiral pattern. C. Close-up of autozooids and vibracula at the colony edge. D. Part of a colony showing autozooids with several intramural buds and others with closure plates. E–G. SMNH-128027. E. General view of the colony without membranes. F. Group of zooids, showing the granular cryptocyst with several concentric rims due to interzooidal budding and the pear-shaped opesiae, and vibracula. Autozooids in the inner ring with closure plates. G. Close-up of an autozooid, showing the semicircular operculum, and associate vibraculum at colony edge. Scale bars: A, D, E = 500 µm; B, C, F, G = 300 µm.
FIGURE 6 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 6. Cranosina transversa (Silén, 1941). Holotype UPSZTY 2465, Japan. A. Close-up of two autozooids and associated interzooidal avicularia distally placed. B. Close-up of an interzooidal avicularium showing the two robust condyles. Scale bars: A = 200 µm; B = 60 µm.
FIGURE 31 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 31. Costaticella gisleni Silén, 1954. Syntype LUZM 51, Western Australia. A. General view of a branch comprising unizooidal and bizooidal segments. B, C. Close-ups of unizooidal segments. D. Close-up of the orifice. E. Close-up of an avicularium. F. Close-up of a bizooidal segment. G. Close-up of an autozooid showing the distolateral avicularium. Scale bars: A = 1 mm; B, C, G = 200 µm; D = 50 µm; E = 25 µm; F = 300 µm.
FIGURE 5 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 5. Corbulella boninensis (Silén, 1941). Lectotype (designated here) UPSZTY 2470D, Bonin Islands, Japan. A. General view of the colony. B–D. Close-up of autozooids with or without the frontal membrane and with and without preserved circumopesial spines. E. Details of the beaded cryptocyst and smooth gymnocyst. F. Ovicellate zooids. G. Vicarious avicularium and ovicellate zooids. H. Kenozooid. Scale bars: A = 500 µm; B, F, H = 150 µm; C, D, G = 200 µm; E = 60 µm.
FIGURE 4 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 4. Cauloramphus japonicus Silén, 1941. Holotype UPSZTY 2463, Japan. A. Group of zooids. B. Close-up of two autozooids lacking stalked avicularia. The arrow indicates the only proximolateral avicularium observed in the specimen. C. Close-up of two autozooids with a single stalked avicularium. D. Intramural budding in autozooids. E. Ovicellate zooids with paired stalked avicularia. F. Close-up of an ovicell flanked by two stalked avicularia. Scale bars: A–E = 200 µm; F = 100 µm.
FIGURE 3 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 3. Cauloramphus costatus Silén, 1941. Holotype UPSZTY 2462, Japan. A. Group of zooids. B. Close-up of an autozooid. C. Close-up of an ovicellate zooid. D. Close-up of ovicells and avicularia. E. Close-up of an autozooid deprived of spines, showing the granular cryptocyst and the budding sites of avicularia. F. Intramurally budded kenozooids. Scale bars: A = 400 µm; B, C, E, F = 200 µm; D = 100 µm.
FIGURE 15 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 15. Heliodoma goesi Silén, 1942a. Caribbean Sea, Virgin Islands. A, B. Lectotype (designated here) SMNH-Type- 1892a. C, D. Paralectotype SMNH-Type-1892b. E–I. Paralectotype SMNH-Type-1892c. J. Paralectotype SMNH-Type-1892d. A, C, E. General view of three colonies, on tests of benthic foraminifera, showing spiral-like budding pattern. The arrows in E point to septulum. B. Close-up of zooids, some with closure plates, some others with membranes and semicircular opercula, and vibracula, one with a seta. D. Close-up of an ovicellate zooid and associate vibraculum at colony edge (arrow pointing to septulum). F. Close-up of two autozooids and associated vibracula. G. Close-up of two autozooids, one ovicellate. H. Close-up of an ovicellate zooid (arrow pointing to the pore of the ooecium) showing the granular cryptocyst. I. Close-up of two autozooids, one ovicellate (arrow pointing to the pore of the ooecium), the other with opesia double rim due to intramural budding. J. View of the dorsal side of the colony that grows over the substrate but does not enwrap it. Scale bars: A, C, E = 500 µm; B, J = 300 µm; D, F, G, I = 200 µm; H = 150 µm.
FIGURE 2 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 2. Amphiblestrum crassispinosum (Silén, 1954). Lectotype (designated here) LUZM 50a, Western Australia. A. General view of the colony encrusting an alga. B. Close-up of the opesia, with the two robust distolateral spines, and the ooecium. C. Tilted view of ovicellate zooids showing the length of the spines and the aviculiferous suboral mucro, broken in some zooids. D. Frontal view of ovicellate zooids showing the suboral aviculiferous mucro of the distal zooid resting on the ooecium. Scale bars: A = 500 µm; B = 150 µm; C, D = 250 µm.
FIGURE 30 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 30. Jullienula ortmanni (Silén, 1941). A–C. Holotype UPSZTY 191144A, Japan. A. Group of autozooids. B. Close-up of two ovicellate zooids. Arrows indicate costal pseudopores. C. Close-up of the orifice. D. Paratype UPSZTY 191144B, Japan. Portion of a young colony showing the ancestrula with the first budded zooids and a kenozooid (see asterisk). Scale bars: A, D = 200 µm; B = 100 µm; C = 40 µm.
FIGURE 1 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 1. Labioporella aviculifera (Silén, 1941) n. comb., Japan. A–E. Holotype SMNH-Type-3082. A. Group of autozooids and an interzooidal avicularium. B. Close-up of zooidal opesia and opesiules. C. Group of autozooids, including zooids at colony bifurcation, irregular zooids at the encounter edge between two colonies, a repaired zooid, and an interzooidal avicularium. D. Group of autozooids, the one at the bottom right showing the interzooidal communication through the opesia. E. Close-up of the granular frontal shield with circular pseudopores. Note the size of granules decreasing distad. F–J. SMHN-132263. F. Two intramurally budded zooids and interzooidal avicularium with rounded, raised rostrum. G. Close-up of a zooid showing opesiules and a broken rectangular chamber of an interzooidal avicularium. H. General view of a colony overgrown by two additional colonies (or colony lobes) with preserved membranes, one of these consisting only of an ancestrula and first budded zooid, and a cyclostome. I. Close-up of two autozooids with membranes and semicircular opercula. J. Lateral view of a group of zooids showing the polypide tube and interzooidal communications through uniporous septula. Scale bars: A, C, D, F, I, J = 500 µm; B = 200 µm; E = 100 µm; G = 300 µm; H = 1 mm.
FIGURE 29 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 29. Figularia japonica Silén, 1941. Paratype UPSZTY 2467, Japan. A. Group of autozooids, one with intramural budding visible through the orifice as a double distal rim. B. Group of autozooids, one with intramural budding and an ovicell resting on its frontal, and a vicarious avicularium also with intramural budding. C. Multiporous septula for interzooidal communication. D. Ovicellate zooids. E. Autozooidal intramural budding with reversed polarity. F. Vicarious avicularium and a kenozooid (teratology?). Scale bars: A, B, D, E = 200 µm; C = 20 µm; F = 60 µm.
FIGURE 9 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 9. Retevirgula triangulata (Silén, 1941). Holotype UPSZTY 2471, Bonin Islands, Japan. A. Group of zooids, some ovicellate, showing the spinose appearance of the colony. B. Group of zooids showing the proximal gymnocyst and tubular connections. C. Close-up of ovicells and an interzooidal avicularium. D. Close-up of an avicularium with open mandible and an autozooid with broken spines showing the extension of the proximal gymnocyst. E. Cluster of kenozooids (arrowed) and avicularia. F. Ovicellate zooids and a kenozooid. G, H. Close-ups of kenozooids. Scale bars: A, B = 400 µm; C, D = 120 µm; E, F = 200 µm; G, H = 100 µm.
FIGURE 7 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 7. Crassimarginatella spinifera Silén, 1941. Holotype UPSZTY 2466, Japan. A. General view of part of the colony. B. Group of zooids. C. Close-up of an avicularium. D. Close-up of ovicellate zooids. E. Examples of intramural budding in both autozooids and avicularia. Scale bars: A, B, D, E = 200 µm; C = 100 µm.
FIGURE 23 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 23. Caulibugula bocki Silén, 1941. A. Holotype UPSZTY 2461, Bonin Islands, Japan. A. Stem of strongly calcified kenozooids and chitinous tubes. B–F. Paratype UPSZTY 191151, Bonin Islands, Japan. B. Branch bifurcation. C. Close-up of zooids at bifurcation. D. Close-up of autozooids along the branch. E. Branch with a partially preserved tubular autozooid. F. Close-up of the tubular autozooid in (E). Scale bars: A, C = 300 µm; B = 500 µm; D, E = 200 µm; F = 100 µm.
FIGURE 38 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 38. Triphyllozoon mauritzoni Silén, 1943. Lectotype (designated here) LUZM 57a (unbleached), Australia. A. General view of the frontal surface. B. Group of autozooids. C. Close-up of an autozooid with large frontal avicularium with bifurcate rostrum and mandible. D. Close up of an autozooid with elliptical frontal avicularium. E. Close-up of the primary orifice. F. Group of zooids, one ovicellate. G. Close-up of the ovicell in (F). H. General view of the dorsal side. I. Dorsal side with basal pillars. Scale bars: A = 1 mm; B, F, H, I = 500 µm; C = 200 µm; D, G = 150 µm; E = 50 µm.
FIGURE 20 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 20. Bugulina kiuschiuensis (Silén, 1941). Holotype UPSZTY 2458, Japan. A. Overview of part of a colony. Arrows indicate putative brooding zooids with folded distolateral margins. B. Close-up of the first basal zooid with rhizoids. C. Close-up of branches at bifurcation. D. Close-up of avicularia and autozooids with folded distolateral margins. Scale bars: A = 400 µm; B, C = 200 µm; D = 120 µm.
FIGURE 27 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 27. Microporina okadai Silén, 1941. Holotype UPSZTY 2468, Japan. A. View of internodes at branch bifurcation. B. Close-up of autozooids, one without operculum. Arrows indicate putative opesiules. C, D. Close-up of autozooids, showing the arrangement in alternating back-to-back rows, and distal avicularia. The arrow in (C) pointing to the triangular downward curved mandible. E, F. Close-up of avicularia. Scale bars: A = 500 µm; B–D = 300 µm; E = 120 µm; F = 200 µm.
FIGURE 26 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 26. Tricellaria dubia Silén, 1941. Paratype UPSZTY 2475, Japan. A, B. View of internodes at branch bifurcation. C. Close-up of autozooids, two with preserved scuta. D, E. Close-up of opesiae with scuta. F. Close-up of an opesia (scutum broken). G. Dorsal view of internodes at branch bifurcation. F. Close-up of the dorsal side of some autozooids. Scale bars: A, B, G = 500 µm; C, D = 150 µm; E, F = 100 µm; H = 200 µm.
FIGURE 25 in Scanning electron microscopy study of Lars Silén's cheilostome bryozoan type specimens in the historical collections of natural history museums in Sweden
FIGURE 25. Beania discodermiae boninensis Silén, 1941. Lectotype (designated here) UPSZTY 2456A, Bonin Islands, Japan. A. Group of zooids. B. Close-up of an autozooid with paired pedunculate avicularia. C. Close-up of an avicularium in lateral view, showing the hooked, slightly serrated rostrum. D. Dorsal view of a group of zooids. E. Dorsal close-up of an autozooid and paired avicularia. Scale bars: A, D = 300 µm; B = 200 µm; C, E = 120 µm.
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