Published April 10, 2018 | Version v1

Thalassionema frauenfeldii HK

  • 1. Genomic and Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia
  • 2. Department of Integrative Biology, University of Texas at Austin, Austin, Texas, USA
  • 3. Division of Natural Sciences, University of Guam, Mangilao, Guam 96923, USA
  • 4. Department of Biochemistry, Faculty of Science, KAU, Jeddah 21589, Saudi Arabia.
  • 5. King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia.
  • 6. Department of Chemistry, Faculty of Science, KAU, Jeddah 21589, Saudi Arabia.
  • 7. Genomic and Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia & Department of Integrative Biology, University of Texas at Austin, Austin, Texas, USA

Description

Thalassionema cf. frauenfeldii HK 372 (Figs 65–68)

Material studied: —Wild and cultured (HK 372) material from the same collection: ECT 4120, collected from plankton tow at Hunting Island, South Carolina, USA (32° 20.56’ N, 80° 22.80’ W).

Description: —Valves observed were 79.6–83.9 μm long, 2.7–3.1 μm wide, with areolar densities of 5–6 areolae in 10 μm along the margin. There was a rimoportula at the very end of each pole. Internally, each rimoportula appeared to be situated at the junction of the face and mantle, and its slit composed of symmetric coverings, which were tangentially arranged. Externally, the rimoportula opening was underneath a broad spine at one pole. Girdle bands were open and without pores.

Remarks: —Measurements of specimens from the DNA voucher fit well within the published ranges of T. frauenfeldii and T. bacillare (summarized in Sugie & Suzuki 2015). It keyed out to T. frauenfeldii according to Sugie and Suzuki (2015). While it had the relatively simple areolar structure (each areola spanned by a simple unbranched bar) of T. frauenfeldii as illustrated by those authors and by Hasle (2001), its end poles were not strongly different from one another, and consequently it keyed out to T. bacillare in Hasle (2001). Sequences from this strain were reported in Lobban and Ashworth (2014a) as belonging to T. frauenfeldii strain HK 372.

Notes

Published as part of Sabir, J. S. M., Theriot, E. C., Lobban, C. S., Alhebshi, A. M., Al-Malki, A. L., Hajrah, N. H., Khiyami, M. A., Obaid, A. Y., Jansen, R. K. & Ashworth, M. A., 2018, Systematics of araphid diatoms with asymmetric rimoportulae or densely packed virgae, with particular attention to Hyalosynedra (Ulnariaceae, Bacillariophyta), pp. 1-49 in Phytotaxa 347 (1) on pages 25-26, DOI: 10.11646/phytotaxa.347.1.1, http://zenodo.org/record/13707999

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Linked records

Additional details

Biodiversity

Scientific name authorship
HK
Kingdom
Chromista
Phylum
Ochrophyta
Order
Thalassionematales
Family
Thalassionemataceae
Genus
Thalassionema
Species
frauenfeldii
Taxon rank
species

References

  • Sugie, K. & Suzuki, K. (2015) A new marine araphid diatom, Thalassionema kuroshioensis sp. nov., from temperate Japanese coastal waters. Diatom Research 30: 237 - 245. https: // doi. org / 10.1080 / 0269249 X. 2015.1055339
  • Hasle, G. R. (2001) The marine, planktonic diatom family Thalassionemataceae: Morphology, taxonomy and distribution. Diatom Research 16: 1 - 82. https: // doi. org / 10.1080 / 0269249 X. 2001.9705509
  • Lobban, C. S. & Ashworth, M. P. (2014 a) Hanicella moenia, gen. et sp. nov., a ribbon-forming diatom (Bacillariophyta) with complex girdle bands, compared to Microtabella interrupta and Rhabdonema cf. adriaticum: implications for Striatellales, Rhabdonematales, and Grammatophoraceae, fam. nov. Journal of Phycology 50: 860 - 884.