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8 results for “Alyonushka”
FIGURE 27. Alyonushka echinata n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 27. Alyonushka echinata n. gen., n. sp. Details of morphology. A, C, H, K, holotype, ZIRAS 1/50712; B, D–F, G, I, J, paratype, ZIRAS 2/50713. A, C, apical and oblique views of calyx with gonozooid (ooeciostome arrowed); note variable sizes of alveolar openings; B, D, oblique and near-profile views of calyx with gonozooid, with broken entrance to gonozooid arrowed; E, skeletal ultrastructure of outer peristomial wall; F, G, close-ups of broken entrance to gonozooid; H, lateral view of zooidal peristome with simpler spiky structures than those more proximal at calyx surface; I, J, spinules on interior walls of peristomes; K, variable alveolar openings and spinose texture of gonozooid surface. Scale bars: A–D, 200 µm; E–G, 100 µm; H–K, 50 µm.
FIGURE 26. Alyonushka echinata n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 26. Alyonushka echinata n. gen., n. sp. A–C, holotype, ZIRAS 1/50712, rotational views of fertile colony; D–F, paratype, ZIRAS 2/50713, rotational views of fertile colony. Arrows indicate the ooeciostome in all photos. Scale bars: 250 µm.
FIGURE 23. Alyonushka filia n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 23. Alyonushka filia n. gen., n. sp. Progressive stages of development of ancestrulate and slightly older colonies. A, B, specimen GLD4–09, Stn 173, at four-zooid stage, with alveoli; C, D, specimen YMG4–14, Stn 363, four-zooid colony with one peristome occluded and spikes on trabeculae; E, F, specimen GLD4–11, Stn 224, also at four-zooid stage but with broader base; G, H, specimen YMG4–14, Stn 365 with more-convex colony center; I, J, specimen YMG4–14, Stn 351, nearsymmetrical four-zooid colony; K, L, specimen GLD4–09, Stn 180, colony with disproportionately thickened base and irregular column margin, suggesting possible regeneration after damage; M, N, specimen GLD4–12, Stn 235, an asymmetrical five-zooid colony; O, P, specimen YMG4–13, Stn 294, with unusually thick basal support. Scale bars: 200 µm.
FIGURE 25. Alyonushka hystricosa n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 25. Alyonushka hystricosa n. gen., n. sp. Holotype, ZIRAS 1/50711. A, ooeciostome; B, calyx margin with autozooidal peristomes, ooeciopore near middle right; C, close-up of peristomes and surface sculpture, ooeciopore at lower right; D, colony base; notice minutely prickled surface; E, oblique view of calyx, ooeciostome to right of center; F, symmetrical alveolus opening between a pair of peristomes. Scale bars: 100 µm.
FIGURE 52. Alyonushka filia n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 52. Alyonushka filia n. gen., n. sp. Micro-CT scans of paratype, NIWA 127724, as back-face isosurface renders showing colony interiors. A, entire colony in profile; note the density of kenozooidal chambers in the column; B, close-up of distal part of column showing diminished numbers of kenozooids where it broadens into the calyx; C, optical section through gonozooid and ooeciostome, with arrowhead indicating a ledge at inner opening of ooeciostome; D, optical section through base of column showing protoecial dome with ancestrular peristome emerging from its apex (purple) and first daughter zooid (red) also originating from protoecium (its communication pore outside plane of section); note multiple layers of kenozooids; E, three successive sections through ancestrular region, moving upwards from left to right, respectively showing protoecium (red) and first daughter zooid (yellow), narrowing to ancestrular peristome and broadening peristome of daughter zooid. Scale bars: A, B, 250 µm; C–E, 100 µm.
FIGURE 21. Alyonushka filia n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 21. Alyonushka filia n. gen., n. sp. A, holotype, ZIRAS 1/50710, profile of colony with paired gonozooid; B, paratype, NIWA 127724, profile of colony with single gonozooid; C–E, specimen YMG4–13, Stn 299, bilaterally compressed, showing developing gonozooid with continuous floor. Scale bars: A, B, 500 µm; C–E, 250 µm.
FIGURE 22. Alyonushka filia n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 22. Alyonushka filia n. gen., n. sp. A–E, G–L, holotype, ZIRAS 1/50710; E, F, paratype, NIWA 127724. A, frontal (apical) view of colony showing two gonozooids separated by a narrow cleft, each chamber with an ooeciopore (arrows); B, oblique view of A from 8 o'clock perspective, showing two gonozooid mounds separated by cleft (concealed in furrow), each mound with complex spiky alveolate surface; C, same, from different angle, cleft at middle left; D, autozooidal peristomes with linear ridges and barbs, and pores; E, skeletal microstructure of gonozooid surface; F, I, incompletely developed autozooidal peristomes with abundant internal spinules; G, close-up of part of cleft between adjacent gonozooids; H, base of colony with hummocks indicating underlying alveolar/kenozooid-like chambers; note densely prickled surface; J, L, ooeciostomes of the two gonozooids shown in A; K, apical view of mature autozooidal peristome. Scale bars: A, 500 µm; B–D, H, 250 µm; F, G, I, J, L, 100 µm; E, K, 50 µm.
FIGURE 24. Alyonushka hystricosa n. gen., n in Bryozoa (Cyclostomata and Ctenostomata) from polymetallic nodules in the Russian exploration area, Clarion - Clipperton Fracture Zone, eastern Pacific Ocean-taxon novelty and implications of mining
FIGURE 24. Alyonushka hystricosa n. gen., n. sp. A, B, holotype, ZIRAS 1/50711, apical and oblique views of capitulum with gonozooid; C, D, same specimen showing entire colony. Arrows indicate the same ooeciostome in each photo. Scale bars: 250 µm.
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