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3 results for “Strombidium”
Figs 16–21 in Redescription of Strombidium coronatum (Leegaard, 1915) Kahl, 1932 (Ciliophora, Spirotricha) based on live observation, protargol impregnation, and scanning electron microscopy
Figs 16–21. Strombidium coronatum, Irish Sea specimens (16–18, scanning electron micrographs; 19–21, protargol impregnation, micrographs of several focal planes were stacked, using the computer program CombineZP from Alan Hadley). 16 – ventrolateral view; 17 – left lateral view showing uniquely shaped peristome, which is roughly triangular in outline and almost flat, extending in the sagittal plane. The extrusomes insert in short oblique rows anteriorly to the girdle kinety; note that some of them are just ejected (arrowhead); 18 – posterior cell portion showing the sharp, longitudinal ridges that have already been illustrated in the original description by Leegaard (1915); 19 – left lateral view of an early divider; 20 – dorsolateral view of an early divider; 21 – ventrolateral view. AP – apical protrusion, BM – buccal membranelles, CM – collar membranelles, DC – distended cell surface, EX – extrusome attachment sites, GK – girdle kinety, MA – macronucleus, OP – oral primordium, VK – ventral kinety. Scale bars: 40 µm (16), 20 µm (17, 19–21), and 10 µm (18).
FIGURE 1 in Morphology and infraciliature of the oligotrich ciliate Strombidium rapulum (Yagiu, 1933) Kahl, 1934 (Protozoa, Ciliophora, Oligotrichida) from the intestine of sea urchin Hemicentrotus pulcherrimus Agassiz
FIGURE 1. Strombidium rapulum from live cells (A, B, D, E–G) and after protargol impregnation (C, E, H, I). (A) Ventral view of a representative specimen, arrowheads mark the cilia of ventral kinety. (B) To show the creeping state, note the cell attached to the substrate with its adoral membranelles. (C) To demonstrate variations in macronucleus shape. (D) Swimming trace. (E) Apical view of the buccal apparatus, arrowheads note argentophilic fibres. (F, G) Ventral view of specimens (from Yagiu 1933 and Poljansky 1951, respectively). (H,I) Ventral and dorsal view of same specimen, to show the infraciliature, arrowhead in H marks the pharyngeal fibres. AM = anterior membranelles; AP = apical protrusion; EM = endoral membrane; GK = girdle kinety; Ma = macronucleus; VK = ventral kinety; VM = ventral membranelles. Scale bars in (A, G–I) = 40 µm, in (F) = 50 µm.
FIGURE 2 in Morphology and infraciliature of the oligotrich ciliate Strombidium rapulum (Yagiu, 1933) Kahl, 1934 (Protozoa, Ciliophora, Oligotrichida) from the intestine of sea urchin Hemicentrotus pulcherrimus Agassiz
FIGURE 2. Microphotographs of Strombidium rapulum from live cells (A–D, F), after Methylgreen Pyronine staining and protargol impregnation (G–K). (A) A typical individual, arrowheads indicate lightreflecting granules in the cytoplasm while arrow marks the tail. (B) A slightly pressed specimens, to show lightreflecting granules in the cytoplasm (arrowheads). (C) Dorsal view, to show the protrusion between anterior membranelles (arrowheads). (D) To show details of the tail (arrow). (E) Ventral view, arrowhead marks the macronucleus. (F) Apical view, to show the apical protrusion (arrow). (G) Ventral view, to show the buccal apparatus. (H) Details of the anterior membranelles, arrowheads demonstrate the argentophilic fibres. (I) Ventral view, arrowheads indicate the girdle kinety, which is composed of monokinetids. (J) To show the ventral kinety (arrowheads). (K) Lateral view, to show the macronucleus. Scale bars = 60 µm.
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