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27 results for “Characeae”
Linked collectors and determiners for: Swiss National Databank of Green Algae (Characeae).
Natural history specimen data linked to collectors and determiners held within, "Swiss National Databank of Green Algae (Characeae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/59f14999-c588-4272-b18a-2ef0cc9fc7b5">https://bionomia.net/dataset/59f14999-c588-4272-b18a-2ef0cc9fc7b5</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/59f14999-c588-4272-b18a-2ef0cc9fc7b5">https://gbif.org/dataset/59f14999-c588-4272-b18a-2ef0cc9fc7b5</a>. Formatted as a Frictionless Data package.
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).
FIGURE 48 in Tolypella mongolica (Charophyceae, Characeae): A new dioecious charophyte species from the center of Eurasia and implications for charophyte taxonomy, including the validation of T. porteri and the new combination for T. jwalae
FIGURE 48. Unrooted ML-tree of Tolypella (model TIM1+G) showing the position of the new species based on ITS rDNA sequence data (14 sequences, 875 aligned positions). Prepared by V.Yu. Nikulin. See Fig. 47 legend for details.
FIGURES 38–46 in Tolypella mongolica (Charophyceae, Characeae): A new dioecious charophyte species from the center of Eurasia and implications for charophyte taxonomy, including the validation of T. porteri and the new combination for T. jwalae
FIGURES 38–46. Oospores of Tolypella mongolica sp. nov., Altai Mountains (LE), general appearance and sparsely coarsely tuberculate surface, scanning electron microscopy: 38–42—general appearance: 38, 41 & 42—lateral view of oospores with different degree of prominence of tubercles; 39 & 40—basal view; 43–46—sparsely coarsely tuberculate surface with different prominence of tubercles. Scale: 38–42—100 μm, 43—10 μm, 44–46—20 μm. Photographs by R.E. Romanov.
FIGURES 29–37 in Tolypella mongolica (Charophyceae, Characeae): A new dioecious charophyte species from the center of Eurasia and implications for charophyte taxonomy, including the validation of T. porteri and the new combination for T. jwalae
FIGURES 29–37. Oospores of Tolypella mongolica sp. nov., Mongolia (UBA, LE), different expression of surface sculpture, scanning electron microscopy: 29 & 30—densely coarsely tuberculate surface; 31—different expression of oospore surface at neighboring fossae, from sparsely weakly tuberculate to having complex tubercles at the middle of fossa; 32 & 33—isolated protrusions with acute forked ends; 34—tuberculate surface and tuberculate surface with forked acute protrusions at neighboring fossae; 35–37—surface resembling an aerial view of a mountain landscape. Scale: 29, 31 & 35—40 μm, 30, 32, 33, 34, 36 & 37—20 μm. Photographs by R.E. Romanov.
FIGURE 1 in Tolypella mongolica (Charophyceae, Characeae): A new dioecious charophyte species from the center of Eurasia and implications for charophyte taxonomy, including the validation of T. porteri and the new combination for T. jwalae
FIGURE 1. Holotype and isotypes of Tolypella mongolica sp. nov., Mongolia (UBA-6283). The upper bigger plant is a holotype. Scale: 2 cm. Photograph by R.E. Romanov.
FIGURES 23–28 in Tolypella mongolica (Charophyceae, Characeae): A new dioecious charophyte species from the center of Eurasia and implications for charophyte taxonomy, including the validation of T. porteri and the new combination for T. jwalae
FIGURES 23–28. Oospores of Tolypella mongolica sp. nov., Mongolia (UBA, LE), general appearance with different expression of surface sculpture, scanning electron microscopy: 23–25—lateral view; 26—apical view; 27—basal view; 28—tangential view of basal pole. Scale: 100 μm. Photographs by R.E. Romanov.
FIGURES 2–22 in Tolypella mongolica (Charophyceae, Characeae): A new dioecious charophyte species from the center of Eurasia and implications for charophyte taxonomy, including the validation of T. porteri and the new combination for T. jwalae
FIGURES 2–22. Morphological traits of Tolypella mongolica sp. nov., Mongolia (UBA, LE, NHMM): 2–5—apical parts of plants with different numbers of more or less compacted branchlets; 6—whorl of most compacted branchlets; 7—lateral branch; 8–10—basal parts of whorls with well-developed branchlets, arrowhead indicates lateral ray with fructifying node; 11—first node (arrowhead) of richly branched plant; 12—close view of apical whorls of branchlets, arrowhead indicates richly fertile single node of main axis of branchlet; 13—apical whorl of branchlets having two-celled ends; 14—gradually tapering three-celled end of long branchlets; 15–20—basal parts of branchlet whorls and axial nodes with numerous oogonia, arrowheads indicate single richly fertile nodes of branchlets above basal branchlet internode having variable length; 21 & 22—richly fertile single nodes of main axes of branchlets: 21—arrowheads indicate lateral rays; 22—arrowheads indicate nodes of lateral rays. Scale: 2–11—5 mm, 12–18, 20–22—1 mm, 19—2 mm. Photographs by R.E. Romanov.
FIGURES 9–15. Chara foliolosa. 9. Habit. 10 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 9–15. Chara foliolosa. 9. Habit. 10. Monoecious plant with oogonium (red arrow) and antheridium (blue arrow) at the same branchlet. 11. Ecorticated basal segment of a branchlet. 12. Apical segment with one ecorticated cell and bract-cells around. 13. Granular aspect of the oospore wall under light microscope. 14. Overview of the oospore SEM. 15. Granular aspect of the oospore wall under SEM.
FIGURES 5–8. Chara braunii 5. Habit. 6 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 5–8. Chara braunii 5. Habit. 6. Gametangia conjoined. Oogonium (red arrow) and antheridium (blue arrow). 7. Thallus and branchlets ecorticated. The black arrow indicates stipulodes in one tier. 8. Apical segment of branchlet and two bract-cells around.
FIGURE 1 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 1. Map of Brazil with the location of sampling points. The area highlighted in gray corresponds to the study area.
FIGURE 3 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 3. ML Phylogenetic tree based on ITS2 sequences. The numbers associated with the nodes indicate the bootstrap values (BS) for maximum likelihood and posterior probability (PP) for Bayesian analysis; nodes without values indicate BS <70% and PP <0.70. Sequences in bold are the new sequences generated. The clades formed are: 1—C. braunii, 2—C. rusbyana, 3—C. haitensis, 4—C. guairensis, 5—C. foliolosa, 6—C. hydropitys.
FIGURE 2 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 2. ML Phylogenetic tree based on rbcL sequences. The numbers associated with the nodes indicate the bootstrap values (BS) for maximum likelihood and posterior probability (PP) for Bayesian analysis; nodes without values indicate BS <70% and PP <0.70. Sequences in bold are the new sequences generated. The clades formed are: 2—C. rusbyana, 3—C. haitensis, 4—C. guairensis, 5—C. foliolosa, 6—C. hydropitys.
FIGURE 4 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 4. ML Phylogenetic tree based on matK sequences. The numbers associated with the nodes indicate the bootstrap values (BS) for maximum likelihood and posterior probability (PP) for Bayesian analysis; nodes without values indicate BS <70% and PP <0.70. Sequences in bold are the new sequences generated. The clades formed are: 1—C. braunii, 2—C. rusbyana, 3—C. haitensis, 4—C. guairensis, 5—C. foliolosa, 6—C. hydropitys.
FIGURES 16–22. Chara guairensis. 16. Habit. 17 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 16–22. Chara guairensis. 16. Habit. 17. Monoecious plant with sejoined gametangia, with oogonium (red arrow) and antheridium (blue arrow) at the same branchlet. 18. Two ecorticated apical segments. 19. Basal segment of a branchlet and a oogonia. 20. Granular aspect of the osospore wall under light microscope. 21. Overview of the oospore under scanning electron microscopy (SEM). 22. Granular aspect of the oospore wall under SEM.
FIGURES 23–28. Nitella flagellifera. 23 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 23–28. Nitella flagellifera. 23. Primary node of a branchlet. The red arrow indicates a central secondary ray. 24. Fertile branchlet with gametangia at second (black arrow) and third (red arrow) nodes. 25. Dactyls 2-celled, elongated. Penultimate cell rounded at distal end. End cell conical and mucronate. 26. Oospore membrane with reticulate aspect under LM. 27. Overview of an oospore under SEM. 28. Oospore membrane with beaded imperfect reticulate to reticulate aspect under SEM.
FIGURES 17–22. Nitella elegans. 17. Upper whorls small and somewhat compacted. 18 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 17–22. Nitella elegans. 17. Upper whorls small and somewhat compacted. 18. Primary node of a branchlet. The red arrow indicates a central secondary ray. 19. Dactyls 2-celled. Penultimate cell cylindrical tapering distally towards the base of end cell. End cell conical, acuminate to mucronate. 20. Oospore membrane with granulate aspect under LM. 21. Overview of an oospore under SEM. 22. Oospore membrane with finely granulate aspect under SEM.
FIGURES 5–10. Nitella acuminata. 5 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 5–10. Nitella acuminata. 5. Upper whorls with loosely compacted heads (a diagnostic feature of N. subglomerata). 6. Compacted heads (a diagnostic feature of N. gollmeriana). 7. Dactyls 1-celled, abbreviated with acuminate apex (a diagnostic feature of N. gollmeriana). 8. Oospore membrane with finely granulate aspect under LM. 9. Overview of an oospore under SEM. 10. Oospore membrane with scabrous aspect under SEM.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.