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8 results for “Acanthocystis”
Fig. 3. Choanocystis symna spec. nov., strain CCAP 1597 in Two New Species of Centrohelid Heliozoans: Acanthocystis costata sp. nov. and Choanocystis symna sp. nov.
Fig. 3. Choanocystis symna spec. nov., strain CCAP 1597/1. (A) Scales of the air-dried specimen. Phase contrast. (B) Living cell. DIC. Contractile vacuoles (cv), kinetocysts (k), microtubule-organizing center (MTOC) and spine scales can be seen. (C) Living cell compressed with a cover-slip. Phase contrast. Nucleus (n) with a central nucleolus (nu) is visible. (D) Air-dried whole-mount of the cell. Type-slide NHMUK 2013.6.28.1. SEM. Spine scales and plate scales are visible. (E) The most common quantity of teeth on the tip of spine scale is four. SEM. (F) Spine scale with three teeth. SEM. (G) Tips of spine scales with five (left) and four (right) teeth. SEM. Scale bars: 5 μm (A–C), 10 μm (D), 1 μm (E–G).
Fig. 6. RAxML tree for 18S in Two New Species of Centrohelid Heliozoans: Acanthocystis costata sp. nov. and Choanocystis symna sp. nov.
Fig. 6. RAxML tree for 18S rRNA genes of 8 pterocystid heliozoans (1320 nucleotide positions). Only bootstrap values more than 50% are shown. New sequence is in bold.
Fig. 5. RAxML tree for 18S in Two New Species of Centrohelid Heliozoans: Acanthocystis costata sp. nov. and Choanocystis symna sp. nov.
Fig. 5. RAxML tree for 18S rRNA genes of 16 heliozoans from the genus Acanthocystis and Polyplacocystis ambigua as an outgroup (1520 nucleotide positions). Only bootstrap values more than 50% are shown. New sequence is in bold. Crossed branches were shortened fourfold.
Fig. 2 in New Freshwater Species of Centrohelids Acanthocystis lyra sp. nov. and Acanthocystis siemensmae sp. nov. (Haptista, Heliozoa, Centrohelea) from the South Urals, Russia
Fig. 2. SEM of Acanthocystis siemensmae sp. nov. A – General view of the scales. B – Long spine scales. C – Apices of long spine scales with ridges. D – Plate scale, long and short spine scale with basal plate. E – Apices of short spine scales with ridges. F – Ridges with teeth at the apex of short spine scale. G – Plate scale with marginal rim. Abbreviations: bp – basal plate; ct – central tooth; ls – long spine scale; lt – lateral tooth; mr – marginal rim; ps – plate scale; r – ridge; sh – shaft; ss – short spine scale; t – teeth. Scale bars: A – 10 µm; B, C, E, G – 1 µm; D – 2 µm, F – 0.5 µm.
Fig. 1 in New Freshwater Species of Centrohelids Acanthocystis lyra sp. nov. and Acanthocystis siemensmae sp. nov. (Haptista, Heliozoa, Centrohelea) from the South Urals, Russia
Fig. 1. SEM of Acanthocystis lyra sp. nov. A – General view of the scales. B – Long spine scale. C – Lyrate distal end of long spine scale with teeth on inner edge. D – Short spine scale with secondary bifurcation. E – Short spine scale with primary bifurcation and teeth. F – Short spine scales with primary and secondary bifurcations. A marginal rim is seen on basal plates of short and long spine scales. G – Plate scales ornamented with an axial thickening. Abbreviations: at – axial thickening; b1 – primary bifurcation; b2 – secondary bifurcation; bp – basal plate; br – branch of furca; mr1 – marginal rim on basal plate of short spine scale; mr2 – marginal rim on basal plate of long spine scale; sh – shaft; t – teeth. Scale bars: A – 10 µm; B, D, E, F, G – 1 µm; C – 0.5 µm.
Fig. 3 in New Freshwater Species of Centrohelids Acanthocystis lyra sp. nov. and Acanthocystis siemensmae sp. nov. (Haptista, Heliozoa, Centrohelea) from the South Urals, Russia
Fig. 3. Line drawings of scales of Acanthocystis lyra sp. nov. (A–C) and Acanthocystis siemensmae sp. nov. (D–F): A, D – long spine scales; B, E – short spine scales; C, F – plate scales.
Fig. 2 in Shedding light on the origin of Acanthocystidae: Ricksol blepharistes gen. n., sp. n. (Ricksolidae fam. n., Panacanthocystida, Centroplasthelida), with notes on the evolution of the genera Acanthocystis, Ozanamia gen. n. (Ozanamiidae fam. n.), and "Heterophrys-like organisms"
Fig. 2 Phylogenetic position of Ricksol blepharistes gen. n., sp. n. (Ricksolidae fam. n.). SSU rDNA maximum-likelihood tree of 144 centrohelids and 56 outgroup organisms (1637 sites; GTRCAT; bootstrap 1000 iterations; 25 rate classes) with the added alternative position of the species where it branched in about half of the other trees
Fig. 1 in Shedding light on the origin of Acanthocystidae: Ricksol blepharistes gen. n., sp. n. (Ricksolidae fam. n., Panacanthocystida, Centroplasthelida), with notes on the evolution of the genera Acanthocystis, Ozanamia gen. n. (Ozanamiidae fam. n.), and "Heterophrys-like organisms"
Fig. 1 Morphology of Ricksol blepharistes gen. n., sp. n. a, b General view of the undis- turbed cell in a Petri dish, IMC. c The cells, squished under a coverslip, DIC. d Single scales detached from the cell depicted in (c). Collage (scales from 3 separate images were com- bined in one view; original raw images are available in Figs. S1, S2, and S3) (PC). e General view of the air-dried spine and plate scales. SEM. f Close-up of the air-dried spine and plate scales (SEM). g Close-up of the single plate scale. SEM. h A crenate margin of the plate scale (SEM). i A fragment of the spine scale from a basal plate end (SEM). Abbreviations: a, axopodia; ar, axial rib; bp, basal plate; g, granules (kinetocysts, extrusomes); hp, hemispherical papillae; m, margin; ps, plate scales; se, conical shaft ending; sh, shaft; ss, spine scales. Scale bars: a–e (a and b are in the same scale to show size variability) 10 µm; f 2 µm; g–i 1 µm
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