Taxon Account

Psammothidium daonense (Lange-Bertalot) Lange-Bertalot; 1999; 286

Synonymy

Achnanthes daonensis Lange-Bertalot in Lange-Bertalot & Krammer 1989
Psammothidium grischunum form. daonensis (Lange-Bertalot) Bukhtiyarova et Round 1996

Key references

Bukhtiyarova L., Round F.E. 1996. Revision of the genus Achnanthes sensu lato. Psammothidium, a new genus based on A. marginulatum. Diatom Research. 11(1): 1-30.

Morphology

Size
Length 10-26 µm, width 5-8 µm (Krammer & Lange-Bertalot 2004).

Shape
Valves elliptic with broadly rounded poles.

Symmetry
Isopolar, bilaterally symmetrical, heterovalvar.

Striae
Radiate on both valves, 27-32 in 10 µm (Krammer & Lange-Bertalot 2004).

Central area
Elliptic on the raphe valve, extended transapically, 1/4-1/2 of valve width, bordered by several shorter striae of varying length, large and rhombic on the rapheless valve.

Raphe
Straight, very slightly expanded round proximal and distal ends.


SEM morphology
Small ridges towards the proximal raphe ends accompany the raphe slit.

Uniseriate striae with round external areola openings, internal areola openings occluded by cribra.

Literature

References are given in chronological order.

Reference
Citation
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; Type Illustration; Description; Ecology
Bukhtiyarova L., Round F.E. 1996. Revision of the genus Achnanthes sensu lato. Psammothidium, a new genus based on A. marginulatum. Diatom Research. 11(1): 1-30. Morphology; Taxonomy; Illustrations;
Lange-Bertalot H. 1999. Neue Kombinationen von Taxa aus Achnanthes Bory (sensu lato). 6. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 6. Phytogeography-Diversity-Taxonomy. Koeltz Scientific Books, Königstein, Germany. 276-289 pp Taxonomy
Monnier O., Lange-Bertalot H., Hoffmann L., Ector L. 2007. The genera Achnanthidium Kützing and Psammothidium Bukhtiyarova et Round in the family Achnanthidiaceae (Bacillariophyceae): A reappraisal of the differential criteria. Cryptogamie, Algologie. 28(2): 141-158. Morphology; Illustrations; Taxonomy
Peeters V., Ector L. 2018. Atlas des diatomées des cours d'eau du territoire bourguignon. Direction Régionale de l'Environnement, de l'Aménagement et du Logement Bourgogne-Franche-Comté, Dijon. Vol.2: 271 pp. Morphology; Taxonomy; Illustrations
This page should be cited as:

Jüttner I., Jones V. Psammothidium daonense (Lange-Bertalot) Lange-Bertalot; 1999; 286. In: Jüttner I., Bennion H., Carter C., Cox E.J., Ector L., Flower R., Jones V., Kelly M.G., Mann D.G., Sayer C., Turner J. A., 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=2364. [Accessed:  ].

Image Gallery

Record last modified: 19/07/2021