Achnanthidium caledonicum (Lange-Bertalot) Lange-Bertalot; 1999; 277
Synonymy
Achnanthes caledonica Lange-Bertalot in Lange-Bertalot & Moser 1994
Achnanthes scotica (Carter) Lange-Bertalot 1993
Achnanthes minutissima var. scotica (Carter) Lange-Bertalot in Lange-Bertalot & Krammer 1989
Achnanthidium minutissimum var. scoticum (Carter) H.Cremer in H. Cremer & B. Wagner 2003
Achnanthes microcephala f. scotica Carter & Bailey-Watts 1981
Key references
Carter J. R., Bailey-Watts A. E. 1981. A taxonomic study of diatoms from standing freshwaters in Shetland. Nova Hedwigia. 33: 513-630.
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
28.8-33.1 µm long, 3 µm wide (UK population).
Shape
Valves linear with broad subcapitate to capitate ends. Frustules in girdle view bent with reflexed ends.
Symmetry
Valves isopolar, bilaterally symmetrical.
Valve
Frustules heterovalvar with concave raphe valve and convex rapheless valve.
Striae
Slightly radiate near the valve centre, becoming more radiate close to the poles.
Axial area
Linear, slightly widening towards the valve centre on the raphe and rapheless valve.
Central area
Rounded with shortened and wider spaced, marginal striae or a transverse fascia on the raphe valve; oval or lanceolate with shortened, wider spaced striae, or a transverse fascia on the rapheless valve. On both valves the transverse fascia can be present only on one side with 1 or 2 shortened striae present on the opposite side.
Raphe
Simple, filiform with straight, hardly expanded proximal and distal ends.
28.8-33.1 µm long, 3 µm wide (UK population).
Shape
Valves linear with broad subcapitate to capitate ends. Frustules in girdle view bent with reflexed ends.
Symmetry
Valves isopolar, bilaterally symmetrical.
Valve
Frustules heterovalvar with concave raphe valve and convex rapheless valve.
Striae
Slightly radiate near the valve centre, becoming more radiate close to the poles.
Axial area
Linear, slightly widening towards the valve centre on the raphe and rapheless valve.
Central area
Rounded with shortened and wider spaced, marginal striae or a transverse fascia on the raphe valve; oval or lanceolate with shortened, wider spaced striae, or a transverse fascia on the rapheless valve. On both valves the transverse fascia can be present only on one side with 1 or 2 shortened striae present on the opposite side.
Raphe
Simple, filiform with straight, hardly expanded proximal and distal ends.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Carter J. R., Bailey-Watts A. E. 1981. A taxonomic study of diatoms from standing freshwaters in Shetland. Nova Hedwigia. 33: 513-630. | Morphology; Taxonomy; Description; 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 |
| Lange-Bertalot H. 1993. 85 Neue Taxa und über 100 weitere neu definierte Taxa ergänzend zur Süßwasserflora von Mitteleuropa Vol. 2/1-4. Bibliotheca Diatomologica 27, J. Cramer, Berlin, Stuttgart. 454 pp | Taxonomy |
| Lange-Bertalot H., Moser G. 1994. Brachysira. Monographie der Gattung. Bibliotheca Diatomologica 29. J. Cramer, Berlin. 212 pp | Taxonomy |
| Williams D. M., Reid G. 2002. The diatom type slides and bibliography of John Carter (1908-1993). Bulletin of the Natural History Museum (Botany Series). 32(2): 137-151. | Taxonomy |
| Cremer H., Wagner B. 2003. The diatom flora in the ultra-oligotrophic Lake El’gygytgyn, Chukotka. Polar Biology. 26: 105-114. | Taxonomy |
| Krammer K., Lange-Bertalot H. 2004. Süßwasserflora Mitteleuropas. Bacillariophyceae. 4. Teil. Achnanthaceae. Kritische Ergänzungen zu Achnanthes s.l., Navicula s.str., Gomphonema. Eds Ettl H., Gärtner G., Heynig H., Mollenhauer D., Gustav Fischer Verlag, Stuttgart. 468 pp | Illustrations |
| Slate J.E., Stevenson R.J. 2007. The diatom flora of phosphorus-enriched and unenriched sites in an Everglades marsh. Diatom Research. 22(2): 355-386. | Morphology; Illustrations |
| Wojtal A.Z., Ector L., Van de Vijver B., Morales E.A., Blanco S., Piatek J., Smieja A. 2011. The Achnanthidium minutissimum complex (Bacillariophyceae) in southern Poland. Algological Studies. 136/137: 167-191. | Morphology; Illustrations |
| Blanco S. 2016. A nomenclatural note on two species of the Achnanthidiaceae (Bacillariophyta). Notulae algarum. 4: 1-2. | Taxonomy |
| 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; Illustrations; Ecology; |
Similar Species
Similar species not published on this website:
Achnanthidium duthii (Sreenivasa) Edlund; 1994; 12
Achnanthidium mangelsdorffii Metzeltin & Lange-Bertalot; 2007; 24
This page should be cited as:
Jüttner I., Wetzel C.E. Achnanthidium caledonicum (Lange-Bertalot) Lange-Bertalot; 1999; 277. 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=4120. [Accessed:
].
Image Gallery
Record last modified: 17/10/2024