Achnanthidium pyrenaicum (Hustedt) Kobayasi; 1997; 148
Synonymy
Achnanthidium biasolettianum (Grunow in Cleve & Grunow) Round & Bukhtiyarova 1996
Achnanthes biasolettiana Grunow in Cleve & Grunow 1880
Achnanthes pyrenaica Hustedt 1939
Key references
Potapova M.G., Ponader K.C. 2004. Two common North American diatoms Achnanthidium rivulare sp. nov. and A. deflexum (Reimer) Kingston: morphology, ecology and comparison with related species. Diatom Research. 19(1): 33-57.
Morphology
Size
Length 8.4-18.4 µm, 2.7-4.6 µm (type material; Potapova & Ponader 2004).
Shape
Valves linear-elliptic, linear-lanceolate or elliptic-lanceolate with subrostrate poles; the valves can appear slightly asymmetrical about the apical axis.
Symmetry
Valves isopolar.
Valve
Frustules heterovalvate, raphe valve concave, rapheless valve convex.
Striae
Striae almost parallel or slightly radiate, near poles slightly radiate or sometimes very slightly convergent.
Axial area
Linear, very slightly widening towards the valve centre on the raphe and rapheless valve.
Central area
On the raphe valve almost absent, small rounded, oval, transapically elongate, or a transverse fascia, sometimes only on one side of the valve with a shortened striae on the opposite side; on the rapheless valve absent or small, narrow elongate.
Raphe
Simple straight with straight, slightly expanded proximal ends, and distal fissures slightly expanded and deflected to the same side.
Length 8.4-18.4 µm, 2.7-4.6 µm (type material; Potapova & Ponader 2004).
Shape
Valves linear-elliptic, linear-lanceolate or elliptic-lanceolate with subrostrate poles; the valves can appear slightly asymmetrical about the apical axis.
Symmetry
Valves isopolar.
Valve
Frustules heterovalvate, raphe valve concave, rapheless valve convex.
Striae
Striae almost parallel or slightly radiate, near poles slightly radiate or sometimes very slightly convergent.
Axial area
Linear, very slightly widening towards the valve centre on the raphe and rapheless valve.
Central area
On the raphe valve almost absent, small rounded, oval, transapically elongate, or a transverse fascia, sometimes only on one side of the valve with a shortened striae on the opposite side; on the rapheless valve absent or small, narrow elongate.
Raphe
Simple straight with straight, slightly expanded proximal ends, and distal fissures slightly expanded and deflected to the same side.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Hustedt F. 1939. Diatomeen aus den Pyrenäen. Berichte der Deutschen Botanischen Gesellschaft. 56: 543-572. | Morphology; Description; Type Illustration |
| Lange-Bertalot H., Ruppel M. 1980. A revision of some taxonomically most problematic groups in Achnanthes bory, important from the ecological point of view. Arch. Hydrobiology Suppliment. Algological studies. 60: 1-31. | Morphology; Type Illustration |
| Lange-Bertalot H., Krammer K. 1989. Achnanthes eine Monographie der Gattung mit Definition der Gattung Cocconeis und Nachträgen zu den Naviculaceae. Bibliotheca Diatomologica Vol. 18. 393 pp; 100 pls | Morphology; Taxonomy; Illustrations |
| Round F.E., Bukhtiyarova L. 1996. Four new genera based on Achnanthes (Achnanthidium) together with a re-definition of Achnanthidium. Diatom Research. 11(2): 345-361. | Taxonomy |
| Kobayasi H. 1997. Comparative studies among four linear-lanceolate Achnanthidium species (Bacillariophyceae) with curved terminal raphe endings. Nova Hedwigia. 65(1-4): 147-163. | Taxonomy; Morphology; Illustrations |
| Potapova M.G., Ponader K.C. 2004. Two common North American diatoms Achnanthidium rivulare sp. nov. and A. deflexum (Reimer) Kingston: morphology, ecology and comparison with related species. Diatom Research. 19(1): 33-57. | Morphology; Type Illustration; |
| Potapova M. 2006. Achnanthidium zhakovschikovii sp. nov. (Bacillariophyta) and related species from rivers of Northwestern Russia. Nova Hedwigia. 82(3-4): 399-408. | Morphology; Illustrations |
| Jüttner I., Chimonides J., Cox E.J. 2011. Morphology, ecology and biogeography of diatom species related to Achnanthidium pyrenaicum (Hustedt) Kobayasi (Bacillariophyceae) in streams of the Indian and Nepalese Himalaya. Algological Studies. 136: 45-76. | Ecology; Illustrations; Morphology |
| Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp | Morphology; Ecology; Illustrations |
Similar Species
This page should be cited as:
Jones V., Cox E. J., Jüttner I. Achnanthidium pyrenaicum (Hustedt) Kobayasi; 1997; 148. 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=3592. [Accessed:
].
Image Gallery
Record last modified: 27/12/2020