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216 results for “Protista”
Figure 8 in Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
Figure 8. Gromia winnetoui sp. nov. A, reflected-light photograph, station 121#7, ~2600-m depth; photographed in water. B, C, scanning electron microscope (SEM) photographs of the agglutinated wall (the rectangle in C indicates the area shown in D). D, SEM photograph of the perforations on the test surface.
Fig. 3 in Free-living Heterotrophic Flagellates Lakes in Turkey (Protista) from Two Hypersaline
Fig. 3. (a) Ancyromonas sigmoides, (b) Caecitellus parvulus, (c) Cafeteria roenbergensis, (d) Cantina marsupialis, (e) Chelonemonas sp., (f) Codosiga botrytis, (g) Carpediemonas membranifera, (h) Neobodo curvifilus, (i) Neobodo designis, (j) Neobodo saliens, (k) unidentified protist, (l)-(m) Pleurostomum flabellatum, (n) Rhyncomonas nasuta, (o) Monosiga brevicollis, (p) Salpingoeca marina, (q) Pendulomonas adriperis, (r) Halocafeteria seosinensis. All micrographs are DIC images. Scale bar in (k) represents for all figures.
Fig. 2 in Free-living Heterotrophic Flagellates Lakes in Turkey (Protista) from Two Hypersaline
Fig. 2. (a) Ancyromonas sigmoides, (b) Neobodo curvifilus, (c) Chelonemonas sp., (d) Carpediemonas membranifera, (e) Caecitellus parvulus, (f) Codosiga botrytis, (g) Cafeteria roenbergensis, (h) Pleurostomum flabellatum, (i) Rhynchomonas nasuta, (j) Salpingoeca marina, (k) Pendulomonas adriperis, (l) Neobodo saliens, (m) unidentified protist, (n) Neobodo designis, (o) Monosiga brevicollis, (p) Halocafeteria seosinensis, (q) Cantina marsupialis.
Fig. 1 in Molecular data suggests the ciliate Mesodinium (Protista: Ciliophora) might represent an undescribed taxon at class level
Fig. 1. Photomicrographs of Mesodinium sp. in vivo. A. Representative individual, front view. B–E. Body shape, top/bottom
Fig. 2 in Molecular data suggests the ciliate Mesodinium (Protista: Ciliophora) might represent an undescribed taxon at class level
Fig. 2. Models of the secondary structure of variable region 4 (V4) of the small subunit rRNA molecule, comparing helices 23_1, 23_2, 23_5 species. GenBank/EMBL accession numbers are enclosed in brackets. The number of nucleotides in Helix E23_1 for each species is given above which these species represent are marked in blue below each illustration.
Fig. 3 in Molecular data suggests the ciliate Mesodinium (Protista: Ciliophora) might represent an undescribed taxon at class level
Fig. 3. The comprehensive phylogenetic tree inferred from SSU rRNA gene sequences using Maximum Likelihood analysis with the model selected by AIC in MRMODELTEST for Bayesian analysis. Numbers at the nodes represent the bootstrap percentages from 1 000 replicates for ML analysis. Asterisks indicate bootstrap values less than 50% at a given node. Evolutionary distance is represented by the branch length separating the species in the figure. The scale bar corresponds to ten substitutions per 100 nucleotide positions.
Figure 1 in Rumen ciliate fauna (Ciliophora, Protista) of Turkish domestic goats living in İzmir, Turkey
Figure 1. Photomicrographs of E. semahatae, fixed and stained with MFS. The cell is in the early stage of binary fission. a) From right side, b) from left side.
Figure 3 in Frontonia anatolica n. sp., a new peniculid ciliate (Protista, Ciliophora) from Lake Van, Turkey
Figure 3. General morphology and oral field of Frontonia spp. F. elliptica (a–d, g), F. fusca (e, f). a, b, g, from Dragesco and Dragesco-Kernéis (1986); c, from Kahl (1931); d, from Foissner (1996); e, f, from Fokin (2008). Cs = Somatic kinety; Cv1–4 = Vestibular kinety 1–4; P1–3 = Peniculus 1–3; Pa = Parorale membrane; Vc = Excretory pores; Large arrow in e marks pigment granules; Small arrow in e marks micronuclei; Arrows in white area in e mark contractile vacuole; Arrows in f mark excretory pores.
Figs 6-8 in Physiological reorganization in the hypotrich ciliate Apoamphisiella vernalis (Protista, Ciliophora, Hypotricha)
Figs 6-8. Middle reorganizers, after protargol-impregnation. Figs 6, 7. Ventral side of specimens showing primordia segregation in 6 and differentiation in 7. The arrowhead in Fig. 6 shows the left frontal cirrus differentiating from the undulating membranes primordium (I). An asterisk marks the ladderized arrangement of the short primordia IV?. Fig. 8. Dorsal side showing dorsal kineties primordia (arrowheads). Fronto-ventral-transverse primordia numbered in romans. (IV?, short primordia possibly related to IV; DK(n), dorsal kineties; LMP, left marginal primordium; OP, oral primordium; RMP, right marginal primordium). Scale bars = 20µm.
Figs 4, 5 in Physiological reorganization in the hypotrich ciliate Apoamphisiella vernalis (Protista, Ciliophora, Hypotricha)
Figs 4, 5. Ventral side of early-to-middle reorganizers, after protargol impregnation. Fig. 4. Early development of primordia I–III. Black arrowhead shows the streak of basal bodies which will form primordia IV and V; white arrowhead shows the postperistomal cirrus. Notice a streak of basal bodies originating from anterior end of oral primordium (asterisk), which contributes to the formation of primordium III. Fig. 5. Early development of primordia IV–VI and right marginal primordium. The arrows point to the right frontoventral cirrus. Fronto-ventral-transverse primordia numbered in romans. (IV?, short primordia possibly related to IV; AZM, adoral zone of membranelles; E, endoral; LMR, left marginal cirral row; LVR, left ventral cirral row; OP, oral primordium; P, paroral; RMP, right marginal primordium; RMR, right marginal cirral row; RVR, right ventral cirral row). Scale bar = 20µm.
Figs 9-14. Reorganizers after protargol-impregnation. Figs 9, 10 in Physiological reorganization in the hypotrich ciliate Apoamphisiella vernalis (Protista, Ciliophora, Hypotricha)
Figs 9-14. Reorganizers after protargol-impregnation. Figs 9, 10. Ventral side of middle-to-late reorganizers. Notice the formation of surplus transverse cirri (black arrowheads) by primordia IV?, the leftmost forming also a second postperistomal cirrus (double black arrowhead). White asterisk shows vestigial procirri originating from primordia IV?, which are later resorbed; black asterisk shows late differentiation of adoral membranelles; black arrow shows differentiating undulating membranes; white arrow indicates residual right frontoventral cirrus; double white arrowhead shows outer dorsomarginal kinety originating from anterior end of right marginal primordium; and white arrowheads indicate newly formed dorsomarginal kineties. Figs 11-14. Nuclear apparatus of different specimens. Notice the dividing (white arrowheads) and non-diving micronuclei (black arrowhead). Fronto-ventral-transverse primordia numbered in romans. Scale bar = 20 µm.
Figs 1-3 in Physiological reorganization in the hypotrich ciliate Apoamphisiella vernalis (Protista, Ciliophora, Hypotricha)
Figs 1-3. Ventral side of early reorganizers, after protargol-impregnation. Figs 1, 2. Epiapokinetal stomatogenesis. Notice some discontinuities in the oral primordium (black arrowheads). Fig. 3. Oral primordium becomes curved to the right and forms an anterior projection (black arrowhead). The white arrowheads mark the postperistomal cirrus, which was not yet resorbed. (AZM, adoral zone of membranelles; LMR, left marginal cirral row; LVR, left ventral cirral row; Ma, macronuclear nodule; OP, oral primordium; RMR, right marginal cirral row; RVR, right ventral cirral row). Scale bar = 20 µm.
Figure 15 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 15. Conicotheca nigrans gen. et sp. nov. A–E, transmission light and scanning electron micrographs of same specimen. A, B, general views. C, aperture. D, proximal part of test ('proloculus') showing smooth surface. E, part of test with rougher surface covered in scale-like features, probably clay particles. F–H, transmission light and scanning electron micrographs of same specimen. F, G, general views. H, distal (apertural) end.
Figure 14 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 14. Conicotheca nigrans gen. et sp. nov. Transmission light micrographs of specimens on open slides in glycerol. A, holotype, reg. no. MPC-02704. B–D, paratypes, reg. nos. MPC-02699-02701. E–I, paratypes, reg. nos. ZF 5168. J–P, additional specimens. All scale bars = 25 Mm.
Figure 11 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 11. Resigella bilocularis sp. nov. Transmission light micrographs of specimens on open slides in glycerol. A, holotype, reg. no. MPC-02697. B, paratype, reg. no. MPC-02696. C, D, general view and detail of specimen illustrated by SEM in Figure 12A–B. E, general view of specimen illustrated by SEM in Figure 13E–F. G, specimen with delicate partition in front of stercomata. H, paratype, reg. no. ZF 5171. I, small specimen with clearly developed neck between the two chambers. All scale bars = 50 Mm.
Figure 10 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 10. Resigella laevis sp. nov. Scanning electron micrographs. A, B, aperture. C, D, surface of test near aperture showing relatively sparse development of finger-like projections. E, general view of test. F, aperture. G, broken section of wall.
Figure 9 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 9. Resigella laevis sp. nov. Scanning electron micrographs. A, general view of test. B, proloculus. C, detail of interdigitated border between smooth organic surface of proloculus and highly ornamented organic surface of later chambers; boxes indicate areas shown in detail in D and F. D, E, surface of chamber immediately in front of proloculus showing mass of finger-like projections; the flat features are probably clay particles. F, G, surface of proloculus.
Figure 8 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 8. Resigella laevis sp. nov. Transmission light micrographs of specimens on open slides in glycerol. A, holotype, reg. no. MPC-02710. B–G, paratypes, reg. nos. MPC-02711-02715. H, I, paratypes, reg. nos. ZF 5170. J–O, other specimens; M shows detail of final chamber with partition in front of stercomata; O shows detail of final chamber with mass of cytoplasm in front of stercomata. All scale bars = 50 Mm except where indicated otherwise.
Figure 7 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 7. Nodellum aculeata sp. nov. Scanning electron micrographs. A, general view of test; area indicated by box is shown in detail in F. B, damaged region showing curved lines of fracture. C, D, broken sections of the wall showing probable agglutinated grain and lack of internal structure. E, inner surface of wall. F, G, surface of wall showing scale-like patches (probably clay particles) surrounded by masses of tiny, finger-like projections.
Figure 6 in New organic-walled Foraminifera (Protista) from the ocean's deepest point, the Challenger Deep (western Pacific Ocean)
Figure 6. Nodellum aculeata sp. nov. Scanning electron micrographs. A, general view of entire specimen; boxes indicate areas shown in detail in other images. B, C, progressively closer views of test surface near the aperture. D, E, progressively closer views of test surface near proloculus. Note the finger-like projections covering the surface of the wall in both areas.
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