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35 results for “Streptophyta”
FIGURE 5 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 5. Angle of cell wall striae in degrees. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top).
FIGURE 3 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 3. Shape of cell apex and cell wall striation in Penium spirostriolatum var. spirostriolatum (A, B) and P. spirostriolatum var. amplificatum (C, D). Scale bar = 20 µm.
FIGURE 4 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 4. Number of cell wall striae per 10 µm. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top).
FIGURE 1 in Penium amplificatum status nova (Desmidiales, Streptophyta)
FIGURE 1. Distribution of two varieties of Penium spirostriolatum in the Dutch province of Drenthe. The grid shows the Dutch 5x5 km RD grid.
FIGURE 3 in Lamprothamnium sardoum sp. nov. (Characeae, Streptophyta): A new species of Lamprothamnium for Europe
FIGURE 3. Oospore removed from the base of plant (the only mature oospore available on the type material). A) side view of oospore, damaged via germination. Scale = 200 µm. B) Detail of oospore wall. Scale = 10 µm.
FIGURE 1 in Lamprothamnium sardoum sp. nov. (Characeae, Streptophyta): A new species of Lamprothamnium for Europe
FIGURE 1. Morphology of Lamprothamnium sardoum R.Becker. A) placement and arrangement of gametangia at the base of the whorl and on the branchlets (some branchlets removed) illustrating abundant gametangia clustered and geminate on the branchlets, as well as inside and outside the base of the whorl. Scale = 0.5 mm. B) Herbarium material (circled) showing long protonemata and fox-tail whorls. Scale = 1 cm. C) Apex of plant with several whorls. Gametangia are abundantly visible on the thallus, along with verticillate, spreading bract cells. Scale = 0.5 mm. D) Arrangment of gametangia when conjoined, antheridium above oogonium in common with other species of Lamprothamnium. Scale = 0.1 mm. E) Fertilised oospore and bract cells on a branchlet.
FIGURE 2 in Lamprothamnium sardoum sp. nov. (Characeae, Streptophyta): A new species of Lamprothamnium for Europe
FIGURE 2. Lamprothamnium sardoum in life. A) Sparse stands in shallow, brackish water in its habitat (Sardinia, 2018–04–05). Scale = 10 cm. B) Detail of the base of a whorl with abundant gametangia. Scale = 2 cm. C) Branchlet tips. Scale = 1 mm. D) Detail of single branchlet end cell. Scale = 0.5 mm. E) Oospore attached to the base of the plant. Scale = 200 µm (Photos R. Becker).
FIGURES 8–11. 8. Cosmarium rostafinskii. 9. C. benedictum. 10. C. amstelodamense. 11. C in Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands)
FIGURES 8–11. 8. Cosmarium rostafinskii. 9. C. benedictum. 10. C. amstelodamense. 11. C. benedictum, zygote. Scalebar = 10μm.
FIGURES 12–18. 12–14. Cosmarium notabile. 15–16. C. galeatum. 17. C. fruticosum. 18. C in Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands)
FIGURES 12–18. 12–14. Cosmarium notabile. 15–16. C. galeatum. 17. C. fruticosum. 18. C. scutiforme. Scalebar = 10μm.
FIGURES 12–13 in Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)
FIGURES 12–13. Spirotaenia diplohelica. Drawings of zygospores (after photographs). 12. Zygospore in optical section with adhering remnants of parental cells. 13. Zygospore in multifocus. Scale bar: 10 μm.
FIGURES 6–11. Spirotaenia diplohelica. 6–8 in Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)
FIGURES 6–11. Spirotaenia diplohelica. 6–8. Focus-through series of one and the same zygospore. 9–11. Zygospores in stages of progressing maturity expressed by a gradual darkening and thickening of the spore wall. Scale bar: 10 μm.
FIGURES 1–5. Spirotaenia diplohelica. 1–3 in Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)
FIGURES 1–5. Spirotaenia diplohelica. 1–3. vegetative cells, characterized by a double, spiralized chloroplast tape. 4. zygospore with adhering remnants of gametangial cells. 5. zygospore showing overlaying hyaline membrane. Scale bar: 10μm.
FIGURES 25, 26 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 25, 26: LM images of (almost) empty cells of Sphaerozosma aubertianum showing crossing rows of cell wall pores. Scale bar = 10 µm.
FIGURES 1–4 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 1–4: Closterium pronum. Fig. 1: vegetative cell. Fig. 2–4: three successive stages of zygospore formation (Fig. 4: mature zygospore in frontal and apical view). FIGURES 5–8: Closterium pygmaeum. FIGURES 9, 10: Euastrum pseudotuddalense. FIGURES 11, 12: Cosmarium vossenbergense. Scale bar A (50 µm): Figs 1–4. Scale bar B (10 µm): Figs 5–12.
FIGURES 19, 20 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 19, 20: LM images of Euastrum pseudotuddalense in frontal and apical view, respectively. FIGURE 21: LM picture of Sphaerozosma vertebratum, courtesy H. Schulp. FIGURES 22–24: LM pictures of Sphaerozosma
FIGURES 13–16 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features
FIGURES 13–16: LM images of Closterium pronum, representing four successive stages of zygospore formation. FIGURE 17: LM image of Closterium pygmaeum. FIGURE 18: LM image of Cosmarium vossenbergense. In all figures, scale bar = 10 µm.
FIGURE 30 in Taxonomic notes on Dutch desmids VI (Streptophyta, Desmidiales): new species, newly described zygospores
FIGURE 30. Cell length of St. brachiatum and St. brachiatoides. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top). The cross shows the mean cell length.
FIGURES 8–12. 8 in Taxonomic notes on Dutch desmids VI (Streptophyta, Desmidiales): new species, newly described zygospores
FIGURES 8–12. 8. Staurastrum quadriradiatum, cell in frontal and apical view. 9. Staurastrum quadriradiatum cell in so-called position 1. 10. Staurastrum quadriradiatum cell in position 2, only two of the four processes are shown. 11. Actinotaenium spinosporum, vegetative cell in frontal and apical view. 12. Actinotaenium spinosporum, zygospore.
FIGURES 1–7. 1 in Taxonomic notes on Dutch desmids VI (Streptophyta, Desmidiales): new species, newly described zygospores
FIGURES 1–7. 1. Zygospore of Staurastum echinatum. 2–4. Staurastrum brachiatoides, vegetative cells. 5–7 Staurastrum brachiatoides, zygospores.
FIGURE 31 in Taxonomic notes on Dutch desmids VI (Streptophyta, Desmidiales): new species, newly described zygospores
FIGURE 31. pH range of locations where Staurastrum brachiatum and St. brachiatoides were found. The boxes show the 25th percentile (bottom), 50th percentile (middle) and the 75th percentile (top). The cross shows the mean pH value.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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