Achnanthidium sieminskae Witkowski, Kulikovskiy & Riaux-Gobin; 2012; 65
Key references
Jüttner I., Hamilton P.B., Wetzel C.E., Van de Vijver B., King L., Kelly M.G., Williams D.M., Ector L. 2022. 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. Cryptogamie Algologie. 43(10): 147-176.
Morphology
Size
11.0-26.0 µm long, 2.0-3.0 µm wide (UK population).
Shape
Valves linear to linear-lanceolate with sub-capitate to capitate poles.
Symmetry
Valves isopolar, bilaterally symmetrical.
Striae
Striae weakly radiate in valve centre, becoming more strongly radiate and denser towards poles, 32-34 in 10 µm on raphe valve, 30-34 in 10 µm on rapheless valve.
Axial area
Narrow, linear on both valves, slightly widening towards valve centre.
Central area
On raphe valve, central area small rounded or indistinct, bordered by 1-2 slightly shortened, more widely spaced striae on each side, central striae can be absent. On rapheless valve, central area indistinct or narrow rhombic.
Raphe
Raphe filiform, straight with slightly widened central pores.
SEM morphology
Striae composed of 2-4 (raphe valve) and 3-5 (rapheless valve) areolae.
11.0-26.0 µm long, 2.0-3.0 µm wide (UK population).
Shape
Valves linear to linear-lanceolate with sub-capitate to capitate poles.
Symmetry
Valves isopolar, bilaterally symmetrical.
Striae
Striae weakly radiate in valve centre, becoming more strongly radiate and denser towards poles, 32-34 in 10 µm on raphe valve, 30-34 in 10 µm on rapheless valve.
Axial area
Narrow, linear on both valves, slightly widening towards valve centre.
Central area
On raphe valve, central area small rounded or indistinct, bordered by 1-2 slightly shortened, more widely spaced striae on each side, central striae can be absent. On rapheless valve, central area indistinct or narrow rhombic.
Raphe
Raphe filiform, straight with slightly widened central pores.
SEM morphology
Striae composed of 2-4 (raphe valve) and 3-5 (rapheless valve) areolae.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Witkowski A., Kulikovskiy M., Riaux-Gobin C. 2012. Achnanthidium sieminskae, a new diatom species from the Kerguelen Archipelago (Austral Islands). Current advances in algal taxonomy and its applications: phylogenetic, ecological and applied perspective. W. Szafer Institute of Botany, Polish Academy of Sciences. 61-68. | Description; Taxonomy; Morphology; Ecology |
| Van de Vijver B., Kopalová K. 2014. Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region. European Journal of Taxonomy. 79: 1-19. | Morphology; Illustrations; Ecology |
| Jüttner I., Hamilton P.B., Wetzel C.E., Van de Vijver B., King L., Kelly M.G., Williams D.M., Ector L. 2022. 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. Cryptogamie Algologie. 43(10): 147-176. | Morphology; Taxonomy; Illustrations; Ecology; |
This page should be cited as:
Jüttner I., Hamilton P.B., Wetzel C.E., Van de Vijver B., King L., Kelly M.G., Williams D.M., Ector L. Achnanthidium sieminskae Witkowski, Kulikovskiy & Riaux-Gobin; 2012; 65. In: Jüttner I., Carter C., Cox E.J., Ector L., Jones V., Kelly M.G., Kennedy B., Mann D.G., Turner J. A., Van de Vijver B., Wetzel C.E., Williams D.M..
Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=4247. [Accessed:
].
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Record last modified: 28/11/2022