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22 results for “Micrasterias”
Figs. 25-45. 25 in Novos registros de táxons dos gêneros Euastrum Ehrenb. ex Ralfs e Micrasterias C. Agardh ex Ralfs (Zygnematophyceae, Desmidiaceae) para a Bahia e o Brasil
Figs. 25-45. 25. Euastrum gayanum var. gayanum; 26. E. gayanum var. angulatum; 27. E. gemmatum var. pinheirensis; 28. E. humbertii; 29-31. E. inerme; 32. E. inusitatum var. symmetricum; 33. E. luetkemuellerii var. luetkemuellerii; 34. E. luetkemuellerii var. carniolicum; 35. E. montanum var. montanum; 36-38. E. obesum var. obesum; 39, 40. E. pectinatum var. brasiliense; 41. E. pectinatum var. pinhareense; 42, 43. E. platycerum var. groenbladii f. goyazense; 44. E. rectangulare; 45. E. spinulosum var. grandeornatum. Barras: Figs. 25, 26, 29-31, 35, 44 = 10 µm; Figs. 28, 32-34, 36-40, 42, 43, 45 = 20 µm; Figs. 27, 41 = 30 µm.
Figs. 46-60. 46 in Novos registros de táxons dos gêneros Euastrum Ehrenb. ex Ralfs e Micrasterias C. Agardh ex Ralfs (Zygnematophyceae, Desmidiaceae) para a Bahia e o Brasil
Figs. 46-60. 46. Euastrum sublobatum var. sublobatum; 47. E. sublobatum var.dissimile; 48. E. sublobatum var. subangustatum; 49. E. subornatum var. brasiliense; 50. E. umbonatum; 51. Micrasterias arcuata var. expansa f. expansa; 52. M. denticulata var. denticulata; 53, 54. M. laticeps var. ampliata; 55, 56. M. prescottiana; 57. M. papillifera var. glabra; 58. M. radiosa var. radiosa; 59, 60. M. radiosa var. ornata f. ornata. Barras: Figs. 48, 49 = 10 µm; Figs. 46, 20 = 20 µm; Figs. 51= 40 µm; Figs. 52-60 = 50 µm.
Figs. 2-24. 2 in Novos registros de táxons dos gêneros Euastrum Ehrenb. ex Ralfs e Micrasterias C. Agardh ex Ralfs (Zygnematophyceae, Desmidiaceae) para a Bahia e o Brasil
Figs. 2-24. 2. Euastrum abruptum var. lagoense; 3. E. ansatum var. attenuatum; 4, 5. E. attenuatum var. brasiliense; 6. E. arciferum var. mediolaeve; 7, 8. E. binale var. hians; 9. E. binale var. papiliferum; 10, 11. E. cornubiense var. cornubiense; 12. E. cornubiense var. medianum; 13, 14. E. croasdaleae var. croasdaleae; 15. E. cuspidatum var. goyazense; 16, 17. E. divaricatum var. divaricatum; 18, 19. E. dubium var. dubium; 20, 21. E. eckertii; 22. E. evolutum var. perornatum; 23, 24. E. fissum var. brasiliense. Barras: Figs. 6-9, 13, 14, 16, 17 = 10 µm; Figs. 2-5, 10-12, 15, 18-24 = 20 µm.
Fig. 1 in Novos registros de táxons dos gêneros Euastrum Ehrenb. ex Ralfs e Micrasterias C. Agardh ex Ralfs (Zygnematophyceae, Desmidiaceae) para a Bahia e o Brasil
Fig. 1. Mapa de localização do Brasil e do estado da Bahia. Em destaque a Área de Proteção Ambiental Litoral Norte.
Fig. 1 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Fig. 1. Mapa de localização da Ilha de Itaparica, Bahia, Brasil, destacando os pontos de coleta na área (círculos pretos).
Figs. 37-42. 37-40 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Figs. 37-42. 37-40. Micrasterias rotata var. rotata; 38, 39. variação morfológica; 38, 40. detalhe do lobo polar. 41, 42. M. thomasiana var. notata; 41. vista frontal; 42. detalhe do lobo polar (MEV). Barras: Figs. 37, 38, 40, 42= 30 μm. Fig. 39 = 100 μm. Fig. 41= 60 μm.
Figs. 15-21. 15, 16. Micrasterias laticeps var. laticeps. 15 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Figs. 15-21. 15, 16. Micrasterias laticeps var. laticeps. 15. vista lateral; 16. vista apical; 17. M. mahabuleshwarensis var. mahabuleshwarensis; 18- 21. M. pinnatifida var. pinnatifida. 18. vista frontal; 19. detalhe da bainha de mucilagem; 20. Variação morfológica; 21. vista apical. Barras = 30 μm.
Supplementary data to "What are the effects of temperature on plasticity, shape symmetry and seasonal variation in freshwater benthic green microalga Micrasterias thomasiana?"
<p>The supplementary data consist of the files including the landmark coordinates of Micrasterias thomasiana semicells used for the analyses described in the manuscript submitted to Aquatic Ecology. The coordinates are presented in the TPS format.</p> <p> </p>
Data from: Static allometry of unicellular green algae: scaling of cellular surface area and volume in the genus Micrasterias (Desmidiales)
The surface area-to-volume ratio of cells is one of the key factors affecting fundamental biological processes and, thus, fitness of unicellular organisms. One of the general models for allometric increase in surface-to-volume scaling involves fractal-like elaboration of cellular surfaces. However, specific data illustrating this pattern in natural populations of the unicellular organisms have not previously been available. This study shows that unicellular green algae of the genus Micrasterias (Desmidiales) have positive allometric surface-to-volume scaling caused by changes in morphology of individual species, especially in the degree of cell lobulation. This allometric pattern was also detected within most of the cultured and natural populations analysed. Values of the allometric S:V scaling within individual populations were closely correlated to the phylogenetic structure of the clade. In addition, they were related to species-specific cellular morphology. Individual populations differed in their allometric patterns, and their position in the allometric space was strongly correlated with the degree of allometric S:V scaling. This result illustrates that allometric shape patterns are an important correlate of the capacity of individual populations to compensate for increases in their cell volumes by increasing the surface area. However, variation in allometric patterns was not associated with phylogenetic structure. This indicates that the position of the populations in the allometric space was not evolutionarily conserved and might be influenced by environmental factors.
FIGURES –. Euastrum subalpinum (114–117), apical view (115), lateral view (116), morphological variability (117); Euastrum subalpinum var. crassum (118–121), apical view (119), lateral view (120), semicell face with wart (arrow) (121); Micrasterias laticeps var. aequilobata (122–123), morphological variability (123); Micrasterias truncata var. pusilla (124–125), median sinus, lobes and lobules – detail (125); Spondylosium pulchellum var. constrictum (126–128), apical view (127), lateral view (128); Staurastrum capitulum (129–132), apical view (130), lateral view (131), cell wall (132); Staurastrum circulare var. americanum (133–135), apical view (134), lateral view (135); Staurastrum cosmarioides (136–138), triangular apical view (137), quadrangular apical view (138); Staurastrum margaritaceum var.alpinum (139–142), apical view (140), cell wall (141), apical view and cell wall (142); Staurastrum orbiculare (143–145), apical view (144), closed basal angles (145); Staurastrum punctulatum (146–147), apical view (147); Staurodesmus controversus (148–149), apical view (149); Staurodesmus convergens (150–151), apical view (151); Staurodesmus croasdaleae (152–153), morphological variability (153). Scale bar 10 µm (114–121, 125–135, 137–151)), 50 µm (122–124, 136, 152–153). in The forgotten world of subaerial desmids (Zygnematophyceae) in the Atlantic Forest, southeast Brazil
FIGURES –. Euastrum subalpinum (114–117), apical view (115), lateral view (116), morphological variability (117); Euastrum subalpinum var. crassum (118–121), apical view (119), lateral view (120), semicell face with wart (arrow) (121); Micrasterias laticeps var. aequilobata (122–123), morphological variability (123); Micrasterias truncata var. pusilla (124–125), median sinus, lobes and lobules – detail (125); Spondylosium pulchellum var. constrictum (126–128), apical view (127), lateral view (128); Staurastrum capitulum (129–132), apical view (130), lateral view (131), cell wall (132); Staurastrum circulare var. americanum (133–135), apical view (134), lateral view (135); Staurastrum cosmarioides (136–138), triangular apical view (137), quadrangular apical view (138); Staurastrum margaritaceum var.alpinum (139–142), apical view (140), cell wall (141), apical view and cell wall (142); Staurastrum orbiculare (143–145), apical view (144), closed basal angles (145); Staurastrum punctulatum (146–147), apical view (147); Staurodesmus controversus (148–149), apical view (149); Staurodesmus convergens (150–151), apical view (151); Staurodesmus croasdaleae (152–153), morphological variability (153). Scale bar 10 µm (114–121, 125–135, 137–151)), 50 µm (122–124, 136, 152–153).
FIGURES 1–2. Micrasterias levergerensis W.F.O in Micrasterias levergerensis sp. nov. (Desmidiaceae, Zygnematophyceae), a new species from the Pantanal of Mato Grosso State, Brazil
FIGURES 1–2. Micrasterias levergerensis W.F.O.Duarte-dos-Santos & C.E.M.Bicudo, sp. nov. (Fig. 1, photomicrograph by W.F.O. Duarte-dos-Santos). Scale bars = 10 µm.
Supplementary data to "Small-scale variation prevails in the cell shape patterning of green microalgae belonging to the genus Micrasterias (Zygnematophyceae, Viridiplantae)"
<p>The supplementary data consist of 24 TPS files including the landmark coordinates of 12 Micrasterias datasets (two separate digitisations for each dataset). In addition, the R script used for the analyses described in the paper submitted to "Evolutionary Biology" and the utility file with factors for Procrustes ANOVA are also included.</p> <p> </p>
Supplementary material 2 from: Levanets A, Janse van Vuuren S (2023) Morphology, taxonomy, biogeography and ecology of Micrasterias foliacea Bailey ex Ralfs (Desmidiales, Zygnematophyceae). PhytoKeys 226: 33-51. https://doi.org/10.3897/phytokeys.226.103500
Geographical distribution of M. foliacea var. elongata, multiornata, nodosa, nurulislamii, quandrinflata and spinosa throughout the world
Data from: Static allometry of unicellular green algae: scaling of cellular surface area and volume in the genus Micrasterias (Desmidiales)
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Figs. 61-67. 61, 62 in Novos registros de táxons dos gêneros Euastrum Ehrenb. ex Ralfs e Micrasterias C. Agardh ex Ralfs (Zygnematophyceae, Desmidiaceae) para a Bahia e o Brasil
Figs. 61-67. 61, 62. Micrasterias thomasiana var. notata; 63, 64. M. torreyi var. nordstedtiana; 65-67. M. truncata var. truncata f. gibbosa. Barras: Figs. 63-67 = 50 µm; Figs. 61, 62 = 100 µm.
Figs. 9-14. 9 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Figs. 9-14. 9. Micrasterias foliacea var. foliácea. detalhe da célula; 10. M. furcata var. furcata; 11. M. furcata var. dichotoma; 12-14. M. laticeps var. laticeps. 12, 13. variação morfológica; 14. ornamentação da parede celular (MEV). Barras = 30 μm.
Figs. 22-28. 22, 23. Micrasterias pinnatifida var. pinnatifida. 22 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Figs. 22-28. 22, 23. Micrasterias pinnatifida var. pinnatifida. 22. variação morfológica; 23. ornamentação da parede celular (MEV); 24-26. M. radians; 24. vista frontal; 25. ornamentação da parede celular (MEV); 26. vista lateral; 27. M. radiosa var. radiosa; 28. M. radiosa var. elegantior. Barras = 30 μm.
Figs. 2-8. 2, 3. Micrasterias abrupta. 2 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Figs. 2-8. 2, 3. Micrasterias abrupta. 2. indivíduo típico; 3. variação morfológica (MEV); 4. M. alata var. alata; 5, 6. M. borgei var. borgei; 5. vista frontal; 6. vista lateral; 7, 8. M. foliacea var. foliácea. 7. vista frontal; 8. vista lateral. Barras: Figs. 2, 3= 10 μm; Figs. 4-8= 30 μm.
Figs. 29-36. 29-31. M. radiosa var. ornata f. ornata. 29 in O gênero Micrasterias (Desmidiaceae, Conjugatophyceae) na Ilha de Itaparica, Bahia, Brasil
Figs. 29-36. 29-31. M. radiosa var. ornata f. ornata. 29. vista frontal; 30. ornamentação da parede celular; 31. vista apical; 32-34. M. radiosa var. ornata f. aculeata. 32. vista frontal; 33. ornamentação da parede celular; 34. vista apical. 35, 36. M. rotata var. rotata. 35. vista frontal; 36. detalhe do lobo polar. Barras = 30 μm.
Supplementary material 3 from: Levanets A, Janse van Vuuren S (2023) Morphology, taxonomy, biogeography and ecology of Micrasterias foliacea Bailey ex Ralfs (Desmidiales, Zygnematophyceae). PhytoKeys 226: 33-51. https://doi.org/10.3897/phytokeys.226.103500
Geographical distribution of M. foliacea var. ornata throughout the world
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