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FIG. 18 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 18. — Achnanthidium lacuslustense sp. nov., specimens from Lustsee, Germany: A, SEM external view of raphe valve; B, SEM internal view of raphe valve; C, D, SEM external views of frustules in girdle view; E, SEM external view of rapheless valve; F, SEM internal view of rapheless valve; G, SEM internal view of centre of rapheless valve; H, SEM internal view of pole of rapheless valve. Scale bars: A-F, 5 µm; G, H, 3 µm.
FIG. 11 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 11. — Achnanthidium neomicrocephalum Lange-Bert. & F.Staab, specimens from Lustsee, Germany: A-F, SEM views of rapheless valves; A, SEM external view of valve; B, SEM internal view of valve; C, SEM external view of pole; D, SEM external view of valve centre; E, SEM internal view of valve centre; F, SEM internal view of pole. Scale bars: A, B, 5 µm; C-F, 1 µm.
FIG. 8 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 8. — Achnanthidium sieminskae Witkowski, Kulikowskiy & Riaux-Gob., specimens from Brunnsee, Germany: A, SEM external view of raphe valve; B, SEM external view of rapheless valve, internal view of raphe valve; C, SEM external view of rapheless valve; D, SEM internal view of rapheless valve; E, SEM external view of rapheless valve at centre; F, SEM external view of rapheless valve at pole. Scale bars: A-D, 5 µm; E, F, 3 µm.
FIG. 12 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 12. — Achnanthidium neomicrocephalum Lange-Bert. & F.Staab: A, C-F, specimens from Loch Tarff, Scotland; B, G, H, specimens from Llyn y Fan Fawr, Wales; A-H, SEM views of raphe valves; A-C, SEM external views of valves; D, internal view of valve; E, SEM external view of valve centre; F, SEM external view of valve pole; G, SEM internal view of valve centre; H, SEM internal view of valve pole. Scale bars: A-C, 5 µm; D, 3 µm; E-H, 1 µm.
FIG. 2. — A-H, Achnanthes microcephala f. scotica J.R in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 2. — A-H, Achnanthes microcephala f. scotica J.R.Carter, type from Ardislaigh Lochan, Scotland; I-AN, Achnanthidium caledonicum (Lange-Bert.) Lange-Bert.; I-S, specimens from Lochan na Ba Ruaidhe, West Sutherland, Scotland; T-Y, specimens from Vilsalpsee, Austria; Z-AG, specimens from Brunnsee, Germany; AH-AN, specimens from Plansee, Austria; A-F, K-X, AA-AN, LM views of valves; G-J, Y, Z, LM views of frustules in girdle view. Scale bar: 10 µm.
FIG. 10 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 10. — Achnanthidium neomicrocephalum Lange-Bert. & F.Staab, specimens from Lustsee, Germany: A-H, SEM views of raphe valves; A-C, SEM external views of raphe valves; D, SEM internal view of raphe valve; E, SEM external view of valve centre; F, SEM external view of half of valve and pole; G, SEM internal view of valve centre; H, SEM internal view of valve pole. Scale bars: A, B, D, 5 µm; C, 10 µm; E-H, 1 µm.
FIG. 7 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 7. — Achnanthidium sieminskae Witkowski, Kulikowskiy & Riaux-Gob.: A-W, specimens from Brunnsee, Germany; X-AT, specimens from Plansee, Austria; AU-BC, specimens from Fischkaltersee; BD-BI, specimens from Ammelsheiner See; BJ-BM, specimens from Harthsee; BN-BQ, specimens from Speicher Dreiweibern; B-BC, BE-BI, BK-BM, BO-BQ, LM views of valves; A, BD, BJ, BN, LM views of frustules in girdle view. Scale bar: 10 µm.
FIG. 1 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 1. — Study sites and regions where Achnanthidium Kütz. species were collected in the United Kingdom, Germany, and Austria. Scotland: 1, Petta Water, Mainland, Shetland Islands; 2, Lochan na Ba Ruaidhe; 3, Ullapool River; 4, unnamed stream west of Arnisdale; 5, Loch Tarff; 6, River Feshi; 7, Loch Morlich; 8, River Spey; 9, Burn of Savoch; 10, Belti Burn. England: 11, River Ehen. Wales: 12, Llyn y Fan Fawr. Germany: 13, Ammelsheiner See; 14, Harthsee; 15, Speicher Dreiweibern; 16, Lustsee; 17, Fischkaltersee; 18, Brunnsee. Austria: 19, Vilsalpsee; 20, Plansee.
FIG. 9 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 9. — Achnanthidium neomicrocephalum Lange-Bert. & F.Staab: A-W, specimens from Lustsee, Germany; X-AD, specimens from Fischkaltersee, Germany; AE-AO, specimens from Loch Tarff, Scotland; AP-CH, specimens from Ullapool River, Scotland; CI-DP, specimens from Llyn y Fan Fawr, Wales; DQ-DZ, specimens from Petta Water, Shetland Islands, Scotland; A-DO, DR-DZ, LM views of valves; DP-DQ, LM views of frustules in girdle view. Scale bar: 10 µm.
FIG. 6 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 6. — Achnanthidium sieminskae Witkowski, Kulikowskiy & Riaux-Gob.: A, E, specimens from River Spey, Scotland; B-D, F-H, specimens from River Feshi, Scotland; A, B, SEM external views of raphe valve; C, SEM internal view of raphe valve; D, E, SEM external views of rapheless valves; F, SEM internal view of raphe valve; G, SEM external view of rapheless valve and mantle; H, external view of frustule in girdle view. Scale bars: A-D, F-H, 5 µm; E, 2 µm.
FIG. 17 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 17. — Achnanthidium lacuslustense sp. nov., specimens from Lustsee, Germany:A-L, LM views of valves; M, LM view of frustule in girdle view.Scale bar:10 µm.
FIG. 16 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 16. — Achnanthidium tirolense sp. nov., specimens from Plansee, Austria: A, B, SEM external views of raphe valves; C, D, SEM internal views of raphe valves; E, SEM external view of rapheless valve; F, SEM internal view of rapheless valve. Scale bars: 5 µm.
FIG. 14 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 14. — Achnanthidium minutissimum (Kütz.) Czarn.: A-Q, S, T, W, Y, specimens from Burn of Savoch, Scotland; R, U, V, X, Z-AW, specimens from Belti Burn, Scotland; A, B, Z, LM views of frustules in girdle view; C-Y, AA-AW, LM views of valves. Scale bar: 10 µm.
FIG. 5 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 5. — Achnanthidium sieminskae Witkowski, Kulikowskiy & Riaux-Gob.: A-I, specimens from Loch Morlich, Scotland; J-P, specimens from River Spey, Scotland; Q-W, specimens from River Feshie, Scotland; X-AR, specimens from unnamed stream west of Arnisdale, Highland, Scotland; AS-AX, specimens from River Ehen, England; AY-BN, specimens from Llyn y Fan Fawr, Wales; B-P, R-W, Y-BN, LM views of valves; A, Q, X, LM views of frustules in girdle view. Scale bar: 10 µm.
FIG. 4 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 4. — Achnanthidium caledonicum (Lange-Bert.) Lange-Bert.: A, C, specimens from Brunnsee, Germany; B, D, specimens from Scotland, 2012, 44sto; A, SEM external view of frustule in girdle view and valve face of rapheless valve; B, SEM external view of pole in girdle view and valve mantle; C, SEM internal view of whole raphe valve; D, SEM internal view of valve centre of raphe valve. Scale bars: A, 10 µm; B, D, 3 µm; C, 5 µm.
FIG. 13 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 13. — Achnanthidium neomicrocephalum Lange-Bert. & F.Staab: A, specimen from Loch Tarff, Scotland; B-D, specimens from Llyn y Fan Fawr, Wales; A-D, SEM views of rapheless valves; A, B, SEM external views of valves; C, SEM external view of valve pole; D, SEM external view of valve centre. Scale bars: A, B, 5 µm; C, D, 2 µm.
APPENDIX 1 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
APPENDIX 1. — Principal component analysis of Fourier shape harmonics for identified species. The biplot presents the first two axes with a total explained variance of 96.4 %.
APPENDIX 2 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
APPENDIX 2. — Linear discriminant analysis of Fourier shape harmonics for A. sieminskae Witkowski, Kulikowskiy & Riaux-Gob. from different geographic regions (Europe, Wales, Scotland and England). Specimens of A. caledonicum (Lange-Bert.) Lange-Bert. are used as the outgroup. The biplot presents the first two axes with a total explained variance of 90.3 %.
FIG. 19 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 19. — Linear discriminant analysis of elliptic Fourier shape harmonics for identified species. The biplot presents the first 2 axes with a total explained variance of 81.3 %.
FIG. 21 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species
FIG. 21. — Relationships between diatom assemblages, four Achnanthidium Kütz. species and land use in 52 streams, rivers and lakes of Scotland, United Kingdom. A, B, NMDS ordination (2D stress 0.1) of Bray-Curtis similarities of diatom assemblages: A, the vector plot shows the direction of linear increase in land use types and the multiple correlation of each of the land use categories with the diatom assemblages; B, the vector plot shows the direction of linear increase in the most abundant diatom species and the multiple correlation of each species with the diatom assemblages. C-F, bubble plots of species: the relative abundance of four diatom species in 52 diatom assemblages is represented by the circle size: C, Achnanthidium minutissimum (Kütz.) Czarn.; D, Achnanthidium sieminskae Witkowski, Kulikowskiy & Riaux-Gob.; E, Achnanthidium neomicrocephalum Lange-Bert. & F.Staab; F, Achnanthidium caledonicum (Lange-Bert.) Lange-Bert.
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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.