Synedra cyclopum
Brutschy 1922 Category: Araphid
BASIONYM: Synedra cyclopum Brutschy 1922
SYNONYM(S): Fragilaria cyclopum (Brutschy) Lange-Bertalot 1980
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Loren Bahls - May 2012
Length Range: 31-70 µm
Width Range: 3.2-7.3 µm
Striae in 10 µm: 15-18
Description
Valves are linear to linear-lanceolate and arcuate, with gradually attenuated subcapitate ends. The axial area is linear and very narrow, widening near the central area. The central area is longer than broad, extends to the valve margins, and often contains ghost striae. The central area is not swollen and may be slightly indented on the concave side of the valve in smaller specimens. Areolae in the striae are indistinct in LM.
Original Description
Basionym: Synedra cyclopum
Author: Brutschy 1922
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Bahls, L. (2012). Synedra cyclopum. In Diatoms of the United States. Retrieved June 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/synedra_cyclopum
Species: Synedra cyclopum
Contributor: Loren Bahls
Reviewer: Sarah Spaulding
Image Credit: Loren Bahls
- Valves arcuate
- Central area not swollen
- Apices subcapitate
Synedra cyclopum has arcuate valves with gradually attenuated subcapitate apices and the central area lacks a unilateral swelling.
Compare
The central area of Hannaea arcus is unilateral and swollen on the ventral side.
Hannaea arcus
Citations
Brutschy, A. (1922). Die Vegetation und der Zooplankton des Hallwiler Sees. Internationale Revue der gesamten Hydrobiologie 10: 91-138, 271-298. 10.1002/iroh.19220100108
Gaiser, E.E. and Bachmann, R.W. (1993). The ecology and taxonomy of epizoic diatoms on Cladocera. Limnology and Oceanography, 38 (3): 628-637. http://www.jstor.org/discover/10.2307/2838037?uid=3739560&uid=2134&uid=2&uid=70&uid=4&uid=3739256&sid=56227186023
Krammer, K. and Lange-Bertalot, H. (1991). Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae. . In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 66013
Autecology Discussion
Synedra cyclopum is uncommon and widely dispersed in the plankton of lakes and reservoirs (and in streams below lakes and reservoirs) in the western United States. Patrick & Reimer (1966) report that it is often attached to crustacea in cool water. In Europe, Krammer & Lange-Bertalot (1991) report it from lakes of medium electrolyte content, where it lives on copepods.
Images
Gates of the Mountains on the Missouri River below Hauser Dam, Lewis & Clark County, Montana: home of Synedra cyclopum.
Credit/Source: Loren Bahls