Caloneis
Cleve 1894 Category: Symmetrical biraphid
TYPE SPECIES: Caloneis amphisbaena Cleve
CLASS: Bacillariophyceae
ORDER: Naviculales
FAMILY:
- Striae chambered
- One or two longitudinal lines may be present
- Central area may have lunate or irregular thickened areas
Species of Caloneis are characterized by chambered striae, like those of Pinnularia. The chambered striae give the appearance of one to two longitudinal lines. The striae of Caloneis are composed of fine alveoli, also like Pinnularia. The central area of Caloneis may be expanded, and may include silica thickenings that are lunate or irregular in shape. Living cells possess one or two plastids.
Several species within Caloneis are common in North America in alkaline, brackish and marine habitats. Several taxonomists suggest that Caloneis is a synonym of the closely related genus Pinnularia and that the two genera should be combined into a single genus.
Cite This Page:
Spaulding, S., and Edlund, M. (2009). Caloneis. In Diatoms of the United States. Retrieved May 22, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Caloneis
Contributor: Sarah Spaulding | Mark Edlund - January 2009
Reviewer: Sam Rushforth
Citations
Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.
Mann, D.G. (1989). On auxospore formation in Caloneis and the nature of Amphiraphia (Bacillariophyta). Plant Systematics and Evolution 163: 43-52.
Mann, D.G. (2001). A discussion of Caloneis and related genera. Diatom 17: 29-36.
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.