Gyrosigma orbitum sp. nov. (Bacillariophyta) from a salt marsh in the Bay of Fundy, eastern Canada
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Mary Thaler
Abstract
An undescribed species of tube-dwelling sigmoid diatoms, Gyrosigma orbitum sp. nov., was found in the surface sediments of a salt marsh in Peck's Cove, Bay of Fundy, Atlantic Canada. The specimens belong to the section Strigilessensu H. Peragallo and they are characterized by very fine longitudinal striation (34–45 in 10 μm), isomorphic proximal raphe endings and two large oval pits within the central area. While recorded in adjacent tidal mudflats, this species reached its highest abundances in the salt marsh, particularly within the cordgrass Spartina patens where it occurred in association with other epipelic taxa, including Diploneis cf. smithii, Surirella spp., Gyrosigma limosum, Nitzschia epithemioides, N. ligowskii, N. sigma, and a number of small sigmoid Nitzschia species. Gyrosigma orbitum is found mainly at sites with high sediment temperature and water content, but a shallow anoxic layer.
©2009 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Publishers' note
- Botanica Marina: 50th anniversary (1959–2009)
- Editorials
- Looking back over 50 years of Botanica Marina
- Botanica Marina: then and now
- Research articles
- The marine algal (seaweed) flora of the Azores: additions and amendments 3
- First record of Contarinia squamariae (Rhizophyllidaceae, Rhodophyta) from Portugal: description of morphological and reproductive structures
- Checklist of benthic marine algae and cyanobacteria of northern Portugal
- Haptophytes of the Nervión River estuary, northern Spain
- Gyrosigma orbitum sp. nov. (Bacillariophyta) from a salt marsh in the Bay of Fundy, eastern Canada
- Sinophysis verruculosa sp. nov. (Dinophysiales, Dinophyceae), a new sand-dwelling dinoflagellate from South Brittany, northwestern France
- Antibacterial, antiviral, and cytotoxic activities of some red and brown seaweeds from the Black Sea
- β-Phenylethylamine content in marine algae around Turkish coasts
- Meetings
- Meetings
