Platessa
Lange-Bertalot 2004 Category: Monoraphid
TYPE SPECIES: Platessa bavarica Lange-Bertalot & Hofmann in Lange-Bertalot
Image Credit: Marina Potapova
CLASS: Bacillariophyceae
ORDER: Achnanthales
FAMILY: Achnanthaceae
- External raphe fissures straight with distict central and terminal pores, no terminal deflections or hooks
- Striae may be uniseriate or multiseriate
- Raphe valve slightly concave
- Rapheless valve slightly convex
Cells form single cells or short chains. Girdle bands are narrow and lack ornamentation.
The genus Platessa was recently established (Lange-Bertalot, 2004) and contains the former Achnanthes conspicua Mayer and the A. holsatica Hustedt group. Members of this genus are widely reported, but low in abundance in collections.
Cite This Page:
Spaulding, S., and Edlund, M. (2009). Platessa. In Diatoms of the United States. Retrieved May 21, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Platessa
Contributor: Sarah Spaulding | Mark Edlund - January 2009
Citations
Krammer, K. and Lange-Bertalot, H. (2004). Bacillariophyceae 4. Teil: Achnanthaceae, Kritische Erganzungen zu Navicula (Lineolatae), Gomphonema Gesamtliteraturverzeichnis Teil 1-4 [second revised edition]. In: H. Ettl et al., Suesswasserflora von Mitteleuropa. Spektrum Akademischer Verlad Heidelberg, 468 pp.
Lange-Bertalot, H. and Krammer, K. (1989). Achnanthes eine Monographie der Gattung mit Definition der Gattung Cocconeis and Nachtragen zu den Naviculaceae. Bibliotheca Diatomologica 18, 393 pp. Cramer, Berlin, Stuttgart.
Michelutti, N., Smol, J.P. and Douglas, M.S.V. (2006). Ecological characteristics of modern diatom assemblages from Axel Heiberg Island (High Arctic Canada) and their application to paleolimnological inference models. Canadian Journal of Botany 84: 1695-1713.