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485 results for “new diatom species”
FIGURES 1–22 in Orthoseira groenlandica sp. nov., a new aerophilic diatom (Orthoseirales, Bacillariophyta) species from Greenland
FIGURES 1–22. Orthoseira groenlandica Goeyers, Kochman-Kędziora & Van de Vijver, sp. nov. LM pictures taken from the holotype material (BR-2801, Qeqertarsuaq, Greenland, sample DM27). 1–6. Solitary frustules in girdle view. 7–22. LM pictures of valves in valve face view showing the rather constant number of carinoportulae and the irregularly spaced marginal spines. Figure 10 represents a teratological valve. Scale bar = 10 µm.
FIGURES 33–35 in Orthoseira groenlandica sp. nov., a new aerophilic diatom (Orthoseirales, Bacillariophyta) species from Greenland
FIGURES 33–35. Orthoseira groenlandica Goeyers, Kochman-Kędziora & Van de Vijver, sp. nov. SEM pictures taken from the holotype material (BR-2801, Qeqertarsuaq, Greenland, sample DM27). 33. SEM internal view of a complete valve. 34–35. SEM internal details of the carinoportulae showing the slits between the carinoportulae. The white arrows in Fig. 34 indicate the slit-like openings scattered between the areolae. Scale bars = 10 µm (Figs 33–34), 1 µm (Fig. 35).
Figs 14–19 in Four new monoraphid diatom species (Bacillariophyta, Achnanthaceae) from the Maritime Antarctic Region
Figs 14–19. Achnanthes kohleriana Kopalová, Zidarova & Van de Vijver sp. nov. Scanning electron micrographs of the type population from Deception Island (South Shetland Islands, Antarctica). 14. SEM external view of an entire raphe valve. 15. SEM external detail of the areolae with the typical cribrate structure. 16. SEM external view of the distal raphe ending. 17. SEM external detail of the central area. 18. SEM internal detail of the central area showing the hooked proximal raphe endings. 19. SEM internal view of an entire raphe valve. Scale bars represent 10 µm for Figs 14 & 19, 1 µm for Fig. 15 and 5 µm for Figs 16–18.
Figs 132–138 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species
Figs 132–138. Arcanodiscus saundersianus Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS272 (BR-4581). 132. Frustule in girdle view with the narrow copulae. The arrows indicate the ligulae. 133. Frustule in girdle view with the narrow copulae. The arrows indicate the fimbriate pars interior of the copulae. Note also the domed valve face. Parts of the upper layer are eroded showing small areolae. 134–135. External valve face views showing the relatively small central area and the well-developed marginal ridges. 136. External view of a valve in girdle view showing the low, almost flat valve face, the absence of marginal ridges and the broad mantle edge. 137. Internal views of an entire valve showing several rimoportulae (arrows). 138. Internal detail of the valve with an indicated rimoportula. Note also the rota on the areolae. Scale bars: 132–137 = 10 μm; 138 = 1 μm.
Figs 67–73 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species
Figs 67–73. Ferocia houkiana Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS284 (BR-4578). 67–68. Two external valve face views with the typical spines, the rounded to slit like areolae and the Müller step. 69. External girdle view of a valve lacking the typical central ring of spines. Note the spines vestiges that are present in the central area. 70. Internal view of an entire valve showing clearly the central rimoportulae (arrow) and the small central area. 71. Internal view of an entire valve showing clearly the submarginal rimoportulae (arrows). 72. Internal detail of the valve with one rimoportula indicated by the arrow. 73. Internal detail of the valve central area with the central rimoportula. Scale bars: 67, 69–70 = 10 μm; 68, 71 = 5 μm; 72–73 = 1 μm.
Figs 125–131 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species
Figs 125–131. Arcanodiscus indistinctus Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS303 (BR-4580). 125. Frustule in girdle view with eroded girdle showing the mantle with the parallel ridges. 126. External view of a valve in girdle view showing the domed valve face, several marginal ridges and some of the narrow, unperforated copulae. 127–128. External valve face view of an entire valve. Note the large central area and the striae on the sloping margin. On Fig. 128, note the siliceous outgrowth on the valve face margin. 129. External view of a valve in girdle view showing the domed valve face, the distinct marginal ridges and the narrow mantle edge. 130–131. Internal views of an entire valve showing the lack of rimoportulae. Scale bars = 10 μm.
Figs 116–124 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species
Figs 116–124. Arcanodiscus crawfordianus Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS303 (BR-4579). 116. Frustule in girdle view. The arrows indicate the fimbriate pars interior of the copulae. 117. External view of a valve in girdle view showing the domed valve face, the marginal spines and some of the narrow, unperforated copulae. 118. External valve face view of an entire valve. Note the spines, the granules in the central area and the striae on the sloping margin. 119. External view of a valve in girdle view showing the domed valve face, the marginal spines, the distinct marginal ridge and the mantle edge bordered by the relatively large groove. 120–121. Several valve face views to show the irregular rings of spines. 122. External detail of the spines and the granules. 123–124. Internal views of an entire valve showing the rimoportulae (arrows). Scale bars: 116, 118–121, 123–124 = 10 μm; 117 = 5 μm; 122 = 1 μm.
Figs 74–115. Three new Arcanodiscus species from Campbell Island. 74–80 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species
Figs 74–115. Three new Arcanodiscus species from Campbell Island. 74–80. Arcanodiscus crawfordianus Goeyers & Van de Vijver sp. nov. LM. Campbell Island holotype population, sample BAS303 (BR-4579). Several valves in valve face view showing clearly the large central area, the irregularly scattered spines and the marginal striae. 81–96. Arcanodiscus indistinctus Goeyers & Van de Vijver sp. nov. LM. Campbell Island holotype population, sample BAS303 (BR-4580). 81. Frustule in girdle view showing the discoid chloroplasts. 82. Frustule in girdle view. 83–96. Several valves in valve face view. Note the thick mantle in some of the valves and the large central area. 97–115. Arcanodiscus saundersianus Goeyers & Van de Vijver sp. nov. LM. Campbell Island holotype population, sample BAS272 (BR-4581). 97–101. Several frustules in girdle view, often connected to each other. 102–115. Several valves in valve face view. Note the thick mantle in some of the valves and the relatively small central area. The marginal striae are hardly visible in LM. Scale bars = 10 μm.
Figs 37–43 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species
Figs 37–43. Angusticopula cosmica Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS303 (BR-4577). 37. Frustule showing both the valve face and girdle formed by open, narrow copulae. The arrows indicate the ligulae. 38. Detail of the mantle valve with the serrated mantle edge (double arrow) and the ligulate copulae (single arrow). 39. Valve in girdle view showing the striated mantle, the narrow ridge bordering the mantle/valve face junction (black arrows) and the typical groove bordering the mantle edge (double white arrow). 40. External view of a valve face showing the dense pattern of granules. 41. External detail of the very fine striae, the small, rounded areolae and the narrow ridge bordering the valve margin. 42. Internal view of an entire valve showing the rimoportulae and the thick mantle. 43. Internal detail of the valve with some rimoportulae. Scale bars: 37–39, 42 = 10 μm; 40 = 5 μm; 41, 43 = 1 μm.
Figure 2 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 2 A–FAdlafia lamdongiensis Glushch., Kulik. & Kociolek sp. nov. SEM. Sample no 00269 A–C external views D–F internal views A whole valve. The valve face is flat B central area C valve end D whole valve E central area F valve end. Scale bars: 2 μm (A), 1 μm (D), 0.5 μm (B, C, E, F).
Figure 5 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 5 A–KAdlafia vietnamensis Glushch., Kulik. & Kociolek, sp. nov. LM, DIC, size diminution series. Slides no 00325 (B–K) and 04633 (A). Holotype (G). Scale bar: 10 μm.
Figure 8 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 8 A–FAdlafia dauiensis Glushch., Kulik. & Kociolek, sp. nov. SEM, sample no 00321. A–C external views D, E internal views A whole valve B central area C valve end D whole valve E central area F valve end. Scale bars: 5 μm (A, D), 2.5 μm (B), 1 μm (C, F), 0.5 μm (F).
Figure 4 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 4 A–DAdlafia babeiensis Glushch., Kulik. & Kociolek, sp. nov. A–CSEM, external views D internal views. Sample no 02168. Scale bars: 2 μm (A, C), 1 μm (B, D).
Figure 7 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 7 A–KAdlafia dauiensis Glushch., Kulik. & Kociolek, sp. nov. LM, DIC, size diminution series. Slide no 00321. Holotype (C). Scale bar: 10 μm.
Figure 3 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 3 A–LAdlafia babeiensis Glushch., Kulik. & Kociolek, sp. nov. LM, DIC, size diminution series. Slide no 02168. Holotype (A). Scale bar: 10 μm.
Figure 6 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 6 A–FAdlafia vietnamensis Glushch., Kulik. & Kociolek, sp. nov. SEM, sample no 00325 A–C external views. D, E internal views A whole valve B central area C valve end D whole valve E central area F valve end. Scale bars: 2.5 μm (A, D), 1 μm (B, C, E), 0.5 μm (F).
Figure 1 from: Glushchenko AM, Kociolek JP, Kuznetsova IV, Kulikovskiy MS (2020) Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam. PhytoKeys 162: 13-27. https://doi.org/10.3897/phytokeys.162.57657
Figure 1 A–GAdlafia lamdongiensis Glushch., Kulik. & Kociolek sp. nov. LM, DIC, size diminution series. Slides no 00269 (A–C, E–G) and 03593 (D). Holotype (A). Scale bar: 10 μm.
Figs 51–58 in New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?
Figs 51–58 (next page). Type material of fossil lacustrine diatom Discostella gabinii Paillès & Sylvestre sp. nov., Lake Petén-Itzá (Guatemala); SEM valve views. 51. External valve view showing a colliculate central area with scattered areolae, knots and papillae, and a marginal area with finely punctuated radiating striae. 52. External view of a large specimen with numerous areolae in the central area; the striae have rounded ends near the margin. 53. Valve view of a complete corroded frustule showing valve interior with medium sized alveoli and marginal fultoportulae located in the middle of every 3rd to 5th alveoli; open valvocopula present. 54. External openings of marginal fultoportulae located just below the crescent end of the striae (white arrowheads). 55. Internal valve view with medium sized alveoli and a large expansion of the smooth central lamina; marginal fultoportulae located on every 3rd to 5th alveoli. 56. Internal valve view with smooth central area with a single areola; open valvocopula present. 57. Detail view of valve margin; marginal fultoportulae composed of one tube with two satellite pores positioned on the external ends of the alveoli; rimoportula with vertically orientated lips, located between two costae at the edge of an alveolus and within the ring of marginal fultoportulae. 58. Detail view of the valve margin with an eroded marginal fultoportula at the edge of the alveolus; note a row of fine pores on the interior of the girdle band (white arrowheads). Scale bars = 51–56 = 2 µm; 57–58 = 1 µm.
Figs 33–40 in New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?
Figs 33–40 (next page). Type material of fossil lacustrine diatom Cyclocostis rolfii Paillès gen. et sp. nov.; SEM internal valve views. 33. Broken valve revealing internal structure; note the reduced cell cavity (white arrowhead). 34. Valve interior showing strong anastomosing ribs merging to a central siliceous ring; central lamina absent; marginal fultoportulae located on every 2nd recessed costa; note the slightly deflected rimoportula (white arrow). 35. Valve interior of a small specimen with strong thick ribs and reduced alveoli, central lamina absent; note the single valve face fultoportula (white arrowhead) located near the valve margin on the raised central area; open valvocopula in place. 36. Broken valve margin showing complex alveolar structure: two thick ribs with a median recessed costa, more inwardly bent, carrying marginal fultoportula composed of one tube and three satellite pores. 37. Valve interior of a small specimen with valvocopula. 38. Heart shaped alveoli due to the marginal fultoportula located on median recessed costa. 39. Internal valve view with marginal fultoportulae and rimoportula arranged in a ring below the valve margin; the single valve face fultoportula (double white arrowhead) is always on the opposite side from the rimoportula (single white arrowhead). 40. Detail of the single valve face fultoportula composed of a short tube and three satellite pores always in an eccentric position. Scale bars: 33, 34 = 5 µm; 35, 39 = 2 µm; 36–38 = 1 µm; 40 = 0.5 µm.
Supplementary material 8 from: Bíró T, Duleba M, Földi A, Kiss KT, Orgoványi P, Trábert Z, Vadkerti E, Wetzel CE, Ács É (2022) Metabarcoding as an effective complement of microscopic studies in revealing the composition of the diatom community – a case study of an oxbow lake of Tisza River (Hungary) with the description of a new Mayamaea species. Metabarcoding and Metagenomics 6: e87497. https://doi.org/10.3897/mbmg.6.87497
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