Aulacoseira principissa sp. nov., a new ‘centric’ diatom species from the sub-Antarctic region
A new centric diatom, Aulacoseira principissa sp. nov., is described from the sub-Antarctic region. The morphology of the species is illustrated using detailed light and scanning electron microscopy observations. Its main discriminating features include the presence of typical bifurcating spines, a...
| Published in: | Phytotaxa |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Phytotaxa
2012
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| Online Access: | http://www.mapress.com/j/pt/article/view/phytotaxa.52.1.5 https://doi.org/10.11646/phytotaxa.52.1.5 |
| Summary: | A new centric diatom, Aulacoseira principissa sp. nov., is described from the sub-Antarctic region. The morphology of the species is illustrated using detailed light and scanning electron microscopy observations. Its main discriminating features include the presence of typical bifurcating spines, a single rimoportula, a typical valve heterovalvy with spineless separation valves and a variable striation pattern on the discus. The new species is compared to related species belonging to the complex of Aulacoseira distans. Aulacoseira principissa has a broad geographical distribution ranging from the sub-Antarctic islands in the southern Indian Ocean to South Georgia in the southern Atlantic Ocean. It is commonly found in slightly acidic, oligotrophic pools with low specific conductance values. |
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