Cocconeis pseudomarginata subsp. intermedia Grunow
Authors/Creators
- 1. Institute for Multidisciplinary Ecological Research in the Salish Sea, Galiano Island, Canada & Advanced Microscopy Facility, Bob Wright Centre, University of Victoria, Victoria, Canada
- 2. Institute for Multidisciplinary Ecological Research in the Salish Sea, Galiano Island, Canada
- 3. Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, Canada
- 4. Hakai Institute, Heriot Bay, Canada & Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, Canada
- 5. University of Alberta, Edmonton, Canada & Institute for Multidisciplinary Ecological Research in the Salish Sea, Galiano Island, Canada
Description
Cocconeis pseudomarginata intermedia Grunow
Cocconeis pseudomarginata var. intermedia Grunow (1867): 13, pl. 1, fig. 6 — Joh (2021): 166, figs. 73–76, 88, 89.
Description
Valves elliptical, length 73.2 (26–68) μm, width 60.1 (14–51) μm. SV (note: no SV specimen to date): sternum broadly lanceolate with ends enlarged and pear-shaped, connected to submarginal hyaline area, with longitudinal line bisecting striae between sternum and valve margins. Outer surface of sternum longitudinally depressed. Transapical striae radiate towards apices, 25–30 in 10 μm; striae composed of elongated areolae. RV: raphe weakly sigmoid, sternum very narrow with terminal ends expanded and with crescent-shaped hyaline area, resulting in raphe distant from apices. Longitudinal depression between raphe and valve margins. Central area small, rhombic. Transapical striae radiate towards apices, 23 (23–28) in 10 μm in inner parts of valve (Joh 2021).
Diagnosis
This taxon differs from the nominate variety, Cocconeis pseudomarginata, in that the raphe is slightly sigmoid and transapical striae of SV are dense (Joh 2021).
Notes
iNaturalist ID: 259455426 (Fig. 12).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- Grunow
- Kingdom
- Chromista
- Phylum
- Ochrophyta
- Order
- Achnanthales
- Family
- Cocconeidaceae
- Genus
- Cocconeis
- Species
- intermedia
- Taxon rank
- subSpecies
References
- Grunow A. 1867 Diatomeen auf Sargassum von Honduras, gesammelt von Linding Hedwigia 6 1-3
- Joh G. 2021 Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea Phytotaxa 528 3 149 179 10.11646/phytotaxa.528.3.1