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9 results for “Hemiholosticha”
Fig. 8. A–D in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 8. A–D. Hemiholosticha pantanalensis nov. spec., early dividers in the SEM. A, C. Ventral overviews. B, D. Details of specimens shown in (A, C). The oral primordium develops near the posterior postoral cirrus and soon invaginates into a pouch. Arrow in (D) marks some short cilia that do not sink into the pouch but remain on its right margin very likely forming the opisthe's undulating membranes. AZM – adoral zone of membranelles; CS I – cirral streak I; LMR – left marginal cirral row; OP – oral primordium; PM – paroral membrane; POC – posterior postoral cirrus; R3 – ventral cirral row 3; RMR – right marginal cirral row. Scale bars: 5 µm (B, D) and 20 µm (A, C).
Fig. 10. A, B. Hemiholosticha pantanalensis nov. spec., a in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 10. A, B. Hemiholosticha pantanalensis nov. spec., a late divider in the SEM. A. Ventral overview. B. Detail of opisthe's oral apparatus. The adoral zone is already evaginated and almost fully developed, i.e., consists of long new anterior membranelles and of short posterior membranelles. The paroral membrane has, however, not got the cyrtohymenid C-shape. AME – anterior membranelles; OAZM – opisthe's adoral zone of membranelles; OLMR – opisthe's left marginal row; OPM – opisthe's paroral membrane; PAZM – proter's adoral zone of membranelles; PME – posterior membranelles. Scale bars: 10 µm (B) and 20 µm (A).
Fig. 6. A–G in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 6. A–G. Hemiholosticha pantanalensis nov. spec., ciliary pattern and nuclear apparatus of early dividers after protargol impregnation. Parental cirri depicted by contour, new ones shaded black. Arrow in (C, D, F) marks the undulating membrane anlage; arrowhead in (A, F) denotes the posterior postoral cirrus, and asterisk in (F) marks the reorganizing parental undulating membranes. A. Ventral view of a very early divider, showing the oral primordium close to the posterior postoral cirrus (arrowhead), i.e., just posterior of the buccal vertex. B. Detail of the oral primordium growing around the posterior postoral cirrus. The oral primordium develops in a deep pouch, as typical of psilotrichids, and consists of densely and irregularly arranged basal bodies that will produce the opisthe's adoral zone of membranelles. C. Ventral view, showing that the opisthe's undulating membrane anlage (arrow) develops from the oral primordium. Five cirral streaks appear in the opisthe: the first two are possibly derived from the oral primordium, the third streak forms near the anterior cirrus of the postoral row, and streaks IV and V develop within ventral cirral row R3. At this stage, the proter's right marginal cirral row anlage appears at the anterior end of the parental row, very likely by dissociation of its anteriormost cirri. The opisthe's right marginal cirral row anlage is formed within the parental row at the level of the oral primordium. D–G. Ventral and dorsal views, showing five cirral streaks developing both in proter and opisthe. Formation of new marginal cirral rows and of dorsal kineties proceeds as usual for psilotrichids. Specifically, the proter's left and right marginal cirral row anlagen develop at the anterior end of the parental marginal cirral rows. The opisthe's left and right marginal cirral row anlagen are formed within the parental marginal cirral rows at the level of the oral primordium. The marginal cirral row anlagen gradually produce new cirri posteriorly. Morphogenesis of the dorsal ciliature begins by formation of within-row primordia in the third dorsal kinety at two sites, anterior and posterior to the fission area, separated by two parental bristles (E). The primordia of the first and second dorsal kinety develop later on and are produced in a similar way, that is, by proliferation of basal bodies at two sites which are separated by some parental bristles. The new dorsal kineties reach their final length and structure in mid-dividers (cp. Fig. 6G with Fig. 7B, D). I–V – cirral streaks; ADK3 – anlagen of dorsal kinety 3; ALMR – anlagen of left marginal cirral row; ARMR – anlagen of right marginal cirral row; DK1–3 – dorsal kineties; MA – macronuclear nodules; MI – micronucleus; OP – oral primordium. Scale bars: 20 µm.
Fig. 7. A–H in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 7. A–H. Hemiholosticha pantanalensis nov. spec., ciliary pattern and nuclear apparatus of mid-dividers (A–D), of a late divider (G, H), and of a post-divider (E, F) after protargol impregnation. Arrow in (A) indicates that ventral cirral row R3 forms from anlagen IV and V. I–V – cirral streaks; DK1–3 – dorsal kineties; F – fibres; LMR – left marginal cirral row; MA – macronucleus; MI – micronucleus; POR – postoral cirral row; R1–3 – ventral cirral rows; RMR – right marginal cirral row. Scale bars: 20 µm.
Fig. 5. A–D in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 5. A–D. Hemiholosticha pantanalensis nov. spec. in the SEM. A, B. Dorsal overviews, showing the three ribs. Arrows mark long posterior bristles. C. Dorsal view of a late divider. D. Detail of fission area of the divider shown in (C). AZM – adoral zone of membranelles; DK1–3 – dorsal kineties; EP – excretory pores; LMR – left marginal cirral row; RMR – right marginal cirral row. Scale bars: 5 µm (D) and 20 µm (A–C).
Fig. 4. A–D in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 4. A–D. Hemiholosticha pantanalensis nov. spec. in the SEM. A. Ventral overview. B–D. Details of oral apparatus; arrows in (C) mark the buccal seal. AZM – adoral zone of membranelles; BR – buccal ridge; DK1 – dorsal kinety; EM – endoral membrane; LMR – left marginal cirral row; PM – paroral membrane; POR – postoral cirral row; R1–3 – ventral cirral rows; SC – scutum. Scale bars: 5 µm (C), 10 µm (B, D), and 20 µm (A).
Fig. 2. A–K in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 2. A–K. Hemiholosticha pantanalensis nov. spec. from life (A–H) and after protargol impregnation (I–K). Arrowhead in (A, B, I) marks the anterior body projection. A–F. Ventral and dorsal (D) overviews, showing general body organization. G, H. Intracelullar green algae contain a subapical red eyespot, starch granules, and a big chloroplast. I–K. Ventral views, showing the ciliary pattern and nuclear apparatus. AZM – adoral zone of membranelles; CH – chloroplast; CV – contractile vacuole; EM – endoral membrane; GA – intracelullar green algae; LMR – left marginal cirral row; MA – macronuclear nodules; MI – micronucleus; PM – paroral membrane; POR – postoral cirral row; R1–3 – ventral cirral rows; RMR – right marginal cirral row; SG – starch granules; ST – stigma. Scale bars: 10 µm (G, H) and 20 µm (A–F, I–K).
Fig. 3. A–D in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 3. A–D. Hemiholosticha pantanalensis nov. spec. in the SEM. A–C. Overviews, showing general body organization. D. Detail of oral apparatus of the specimen shown in (C). The paroral membrane is C-shaped and extends on the buccal ridge. The length of the adoral cilia abruptly decreases in the proximal half of the adoral zone. AZM – adoral zone of membranelles; BR – buccal ridge; BU – buccal cavity; LMR – left marginal cirral row; PM – paroral membrane; POR – postoral cirral row; R1–3 – ventral cirral rows; RMR – right marginal cirral row; SC – scutum. Scale bars: 10 µm (D) and 20 µm (A–C).
Fig. 1. A–K in Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)
Fig. 1. A–K. Hemiholosticha pantanalensis nov. spec. from life (A, G–K) and after protargol impregnation (B–F). Arrowhead in (A, B, E, G, H) marks the anterior body projection. A. Ventral view of a representative specimen. B, C, E, F. Ventral and dorsal view of ciliary pattern and nuclear apparatus in holotype (B, C) and in a paratype (E, F) specimen. D. Semi-schematic diagram of a dorsal kinety. G, H. Shape variants. I. Cross section, showing three prominent dorsal ribs (arrows). J. Intracellular green algae contain a subapical red eyespot, starch granules, and a big chloroplast. K. Division of an intracellular green alga yields four tightly packed daughter cells. AZM – adoral zone of membranelles; CH – chloroplast; DB – dorsal bristles; DK1–3 – dorsal kineties; DI – dorsal dikinetids; EM – endoral membrane; LMR – left marginal cirral row; MA – macronuclear nodules; MI – micronucleus; PM – paroral membrane; POR – postoral cirral row; R1–3 – ventral cirral rows; RMR – right marginal cirral row; SG – starch granules; ST – stigma. Scale bars: 20 µm (B, C, E, F) and 40 µm (A).
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