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30 results for “Neidium”
FIGURES 26–34. 26–30 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 26–34. 26–30. Neidium amphigomphus. LM external view illustrating the size range of the valve. Note the straight pointed ends, small elliptical central area, and tight proximal raphe ends. 26. From CANA 93650. 27. From CANA 93279. 28. From CANA 93284. 29. From CANA 100066. 30. From CANA 100072. 31–34. Neidium fossum from CANA 100072. LM external view illustrating the size range of the valve. Note the large inner-most canal and subsequent small canals, arrow shaped ends, ovular central area and bent proximal raphe ends. 33. Neidium fossum holotype (CANA! 100072). Scale bar = 20 μm.
FIGURES 1–15 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 1–15. Extracted from Ehrenberg's original line drawing (ECD). 1b, 2a, 3a, 4–8. Identified as Navicula amphigomphus. 1b. ECD2239 Andower. 2a. ECD2238 Boston. 3a. ECDR2241 Bridgewater. 4. ECD2068 Rel del Monte. 5. ECD2233 West Point. 6. ECD2247 Blue Hill Pond II. 7. ECD2246 Blue Hill Pond I. 8. ECD2234 Stratford. 1a, 2b, 3b, 9–15. Identified as Navicula dilatatum. 1a. ECD2239 Andower. 2b. ECD2238 Boston. 3b. ECD2241 Bridgewater. 9. ECD2233 West Point. 10. ECD2236 Smithfield. 11. ECD2237 Pelham. 12. ECD2247 Blue Hill Pond II. 13. ECD2234 Stratford. 14. ECD2243 Wrenham. 15. ECD2246 Blue Hill Pond I. Reproduction of these images under the copyright permission of the Institute of Paleontology, Museum für Naturkunde, Humboldt University of Berlin (BHUPM).
FIGURES 22–25. 22 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 22–25. 22. Neidium tumescens from Cherryfield, Maine. LM external view illustrating the whole valve. 23–24. Neidium dilatatum. LM external view illustrating the size range. 23. From CANA 93279. 24. From CANA 93281. 25. Neidium hitchcockii from CANA 100068. LM external view illustrating the whole valve. Scale bar = 20 μm.
FIGURES 16–21 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 16–21. Neidium specimens (LM) original type materials. 16. Neidium dilatatum lectotype, Andower Massachusetts (BHUPM! ECO–101). 17. Neidium amphigomphus lectotype, Bridgewater Massachusetts (BHUPM! ECO–100). 18. Neidium fossum originally identified by Ehrenberg as N. dilatatum, Stratford Connecticut. 19. Neidium hitchcockii lectotype, Bridgewater (BHUPM! ECO–102). 20. Neidium fossum originally identified by Ehrenberg as N. dilatatum, Pelham Massachusetts. 21. Neidium firma lectotype (BM! 18414). Scale bar = 20 μm.
FIGURES 43–47. 43–44. Neidium fossum from CANA 100072 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 43–47. 43–44. Neidium fossum from CANA 100072. SEM external view of apex and central area, note ovular central area, large internal canal with smaller external canals, and long bent proximal raphe ends. 45–46. Neidium fossum from CANA 100072. SEM internal view of apex and central area. Note large internal canal. 47. Neidium fossum from CANA 100072. SEM internal view of whole valve. Note the large internal canal and oblong central area. Scale bar = 10 μm.
FIGURES 48–49 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 48–49. Phylogenetic relationships of species in the genus Neidium made using an rcbL 18S alignment under the TIM3+I+G model. 48. The tree was constructed using a bootstrapped Maximum Likelihood The nodes indicate the level of support given as percentages, ML bootstrap values. 49. The tree was constructed using a Bayesian Analysis, with posterior probabilities listed at significant nodes to indicate the level of support.
FIGURES 35–42. 35–36. Neidium dilatatum from CANA 93284 in Morphology and molecular studies on large Neidium species (Bacillariophyta) of North America, including an examination of Ehrenberg's types
FIGURES 35–42. 35–36. Neidium dilatatum from CANA 93284. SEM external view of apex and central area, note tight circular central area, multiple small canals and small hooked proximal raphe ends. 37–38. Neidium dilatatum from CANA 100072. SEM internal view of apex and central area, note arrow-shaped ends with multiple small canals. Arrow indicates the fine silica ridge connecting the central helictoglossae. 39–40. Neidium amphigomphus from CANA 93284. SEM external view of apex and central area, note oblong central area and equal triangular ends. 41–42. Neidium amphigomphus from CANA 100072. SEM internal view of apex and central area, note the parallel sides and the equal triangular ends. Scale bars = 10 μm (39–42), 20 μm (35–38).
FIGURES 31–36 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 31–36. Neidium vandusenense sp. nov. SEM, external view. Fig. 31. Whole valve. Fig. 32. Central valve with multiple longitudinal canals and transapical central area. Proximal raphe branches evenly hooked. Fig. 33. Apex valve face and mantle showing concave mantle wall, longitudinal canals reducing to one at the apex. Fig. 34. Valve face showing developed ridge along one side of the raphe (arrow) and scattered surface depressions along the axial area. Areolae recessed with a finger-like cribra. Fig. 35. Apex with 3 evident copulae. Copulae open bands with 2 rows of pores. Lacina extends to band base (arrow). Fig. 36. Central region showing a weak elevation of the longitudinal canal. Scale bars = 20 μm: Fig. 31; 10 μm: Figs 32, 33; 2 μm: Figs 34–36.
FIGURES 79–82 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 79–82. Neidium lavoieanum sp. nov. SEM, internal view. Fig. 79. Half valve showing valve outline. Fig. 80. Broken longitudinal canal with areoale and internal valve face areolae. Arrow indicates renilimbia. Fig. 81. Internal central nodule with a covering over the verminae along the margin. Helictoglossae separated and aligned. Fig. 82. Apex, showing longitudinal canal extending to the apex and an erect helictoglossa next to hyaline thickened apex. Scale bars = 10 μm: Fig. 79; 5 μm: Fig. 81; 3 μm: Figs 80, 82.
FIGURES 1–5 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 1–5. Neidium iridis (Fig. 1) and Neidium beatyi sp. nov. (Figs 2 (holotype), 3–5). Scale bar = 50 μm.
FIGURES 75–78 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 75–78. Neidium lavoieanum sp. nov. SEM, external view. Fig. 75. Half valve. Fig. 76. Surface areolae with no occlusions and axial area mid-way along the valve. Fig. 77. Elevated central area with elongated areolae along the margin and recurved proximal raphe endings. Fig. 78. Apex showing lacinia and longitudinal canals extending to the apex. Scale bars = 10 μm: Fig. 75; 3 μm: Figs 76–78.
FIGURES 56–61 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 56–61. Neidium collare sp. nov. SEM, external view. Fig. 56. Whole valve. Fig. 57. Central valve with longitudinal canal and transapical central area. Proximal raphe branches deflected. Fig. 58. Valve face mantle junction with epivalve, hypovalve and copula band. Fig. 59. Valve face with developed areolae. Areolae without finger-like cribra. Fig. 60. Apex with open bands of copulae. Copulae with 2 rows of pores. Lacinia weakly developed. Fig 61. Apex showing no apparent lacinia. Longitudinal canals extend to the tip of the apex. Scale bars = 30 μm: Fig. 56; 5 μm: Figs 57, 58, 60; 3 μm: Fig. 61; 2 μm: Fig. 59.
FIGURES 37–44 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 37–44. Neidium vandusenense sp. nov.SEM, internal view.Fig. 37. Central area with offset forming interconnected helictoglossae. Surface depressions (ghost striae) present in the central area. Figs 38, 39. Apex showing upright formation of the helictoglossae at the edge of the terminal nodule. Longitudinal canals blend in with areolae. Figs 40, 41. Margin of the valve showing multiple longitudinal canals. Open chambered formation (Fig. 41 (arrow), apical and transapical). Fig. 42. Renilimbia surround hymenae covered areolae (arrow). Figs 43, 44. Open copula band with 2 rows of poroids. Scale bars = 5 μm: Figs. 37, 38, 43; 2 μm: Figs 40, 41; 1 μm: Figs 42, 44.
FIGURES 6–12 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 6–12. Neidium beatyi sp. nov. SEM, external view. Fig. 6. Whole valve. Fig. 7. Central area raphe with silica ridges along each side. Figs 8, 10. Valve margin and mantle with multiple longitudinal canals. Copulae 2 rows of poroids. Fig 9, 12. Recessed areolae chambered and interconnected with finger-like cribra. Fig. 11. Apex showing arrow-like bifurcate lacinia. Copulae (3 evident) open bands with no evident poroids. Scale bars = 20 μm: Fig. 6; 10 μm: Fig. 11; 5 μm: Figs 7–10; 2 μm: Fig 12.
FIGURES 62–68 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 62–68. Neidium collare sp. nov. SEM, internal view. Fig. 62. Whole valve. Figs 63, 67. Recessed areolae and longitudinal canals at mid-valve and close to apex. Figs 65, 66. Central area with offset forming interconnected helictoglossae. Very weak surface depressions (ghost striae) present in the central area. Remnants of renilimbia present (arrows). Fig. 64. Apex showing an erect helictoglossa at terminal nodule and single longitudinal canal extending to the apex. Fig. 68. broken valve showing the canal. Scale bars: 20 μm: Fig. 62; 5 μm: Figs 64, 65; 3 μm: Figs 63, 66, 67; 1 μm: Figs 68.
FIGURES 83 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 83. RaxML phylogenic tree construction showing boostrap (BS) confidence levels using the gene rbcL for selected taxa within the genus Neidium.
FIGURES 13–18 in Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences
FIGURES 13–18. Neidium beatyi sp. nov. SEM internal view. Fig. 13. Central area with linear forming interconnected helictoglossae. Fig. 14. Apex with a curved forming helictoglossa at the edge of the terminal nodule. A single prominent longitudinal canal extends to the nodule. Figs 15, 17. Multiple longitudinal canals; at center canal similar (Fig. 15), towards apex one becomes more prominent (Fig. 17, arrow). Fig. 16. Renilimbia surround hymenae covered areolae (arrow). Fig. 18. Open chambered formation (apically and transapically) of the longitudinal canal. Scale bars = 10 μm: Fig. 14; 5 μm: Figs 13, 17; 2 μm: Fig. 15: 500 nm: Figs 16, 18.
FIGURES 7–13 in A New Aerophilic Neidium Pfister (Neidiaceae, Bacillariophyta) species from Guangxi Zhuang Autonomous Region, China
FIGURES 7–13. Neidium convolutum Liu & Kociolek sp. nov. SEM, external view. Fig. 7: Whole valve, showing the twisted part (white arrow); Fig. 8: Wedge-shaped apex, with lacinia covered the terminal raphe ends (white arrow); Fig. 9: Wedge-shaped apex of the same valve with lacinia original from mantle (white arrow); Fig. 10: Longitudinal canal with one or two rows of areolae (with arrow); Fig. 11: Magnification of the areolae opening, showing the volate occlusions. Fig. 12: Elliptical central area, with proximal raphe ends curved in opposite sides, some areolae positioned at the axial area next to the raphe (white arrow); Fig. 13: Uncompleted valve, with unoccluded areolae.
FIGURES 4–6 in A New Aerophilic Neidium Pfister (Neidiaceae, Bacillariophyta) species from Guangxi Zhuang Autonomous Region, China
FIGURES 4–6. Neidium convolutum Liu & Kociolek sp. nov. LM pictures. Valve views showing size dimension various. Scale bar = 10 µm.
FIGURES 1–3 in A New Aerophilic Neidium Pfister (Neidiaceae, Bacillariophyta) species from Guangxi Zhuang Autonomous Region, China
FIGURES 1–3. Neidium convolutum Liu & Kociolek sp. nov. LM pictures. Valve views showing size dimension various. Fig.2 is of the holotype. Scale bar = 10 µm.
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