Urosolenia
(Round & Crawford) emended Rott, Kling & McGregor 2006 Category: Centric
TYPE SPECIES: Urosolenia eriensis (H.L. Smith) Round & Crawford in Round, Crawford & Mann
CLASS: Rhizosoleniophycidae
ORDER: Rhizosoleniales
FAMILY: Rhizosoleniaceae
- Frustules long, cylindrical
- One elongated spine per valve
- Frustules lightly silicified
- Valves joined by numerous scale-like copulae
Urosolenia includes small, centric species that are lightly silicified. Frustules typically lie in girdle view. One elongated spine extends from each valve face. Numerous scale-like copulae, or girdle bands, join the two shallow valves within a frustule.
Frustules of Urosolenia are fragile and are often destroyed by standard oxidative preparation for diatoms. Because of its fine structure, it is not often reported in surveys. Cells are best viewed live, or with burned mount prepartions. Urosolenia produces heavily silicified resting spores that may be preserved in sediments. The genus occurs commonly in shallow, eutrophic lakes.
Cite This Page:
Spaulding, S., and Edlund, M. (2009). Urosolenia. In Diatoms of the United States. Retrieved May 19, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Urosolenia
Contributor: Sarah Spaulding | Mark Edlund - January 2009
Citations
Edlund, M.B. and Stoermer, E.F. (1993). Resting spores of the freshwater diatoms Acanthoceras and Urosolenia. Journal of Paleolimnology 9: 55-61.
Karthick, B. and Kociolek, J.P. (2011). Four new centric diatoms (Bacillariophyceae) from the Western Ghats, South India. Phytotaxa 22: 25-40.
Rott, E., Kling, H. and McGregor, G. (2006). Studies on the diatom Urosolenia Round & Crawford (Rhizosoleniophycideae) Part 1. New and reclassified species from subtropical and tropical freshwaters. Diatom Research 21: 105-124.
Links
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
November 22nd, 2010 - Emended description
The genus Urosolenia was emended in 2006. The website was updated and reflects a change from: Urosolenia Round & Crawford in Round, Crawford & Mann to: Urosolenia (Round & Crawford) Rott, Kling & McGregor. The update was made by S. Spaulding.