Cocconeis convexa Giffen

• Main Author: Joh, Gyeongje
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Chromista; Bacillariophyta; Bacillariophyceae; Achnanthales; Cocconeidaceae; Cocconeis; Cocconeis convexa; Baja; Patagonia; Kerguelen; Kerguelen Islands; Pacific; Indian; Argentina; Hernandez; Romero; Navarro
• Online Access: https://dx.doi.org/10.5281/zenodo.5788088; https://zenodo.org/record/5788088

5. Cocconeis convexa Giffen (Figs 42–44, 100–102) Basionym: Giffen 1967, p. 257, figs 26–28. References: Witkowski et al. 2000, p. 104, pl. 37, figs 5, 6, pl. 41, figs 1–4; Suzuki 2001, p. 60, figs 1–35; Riaux-Gobin et al. 2011, p. 22, pl. 3, figs 1–5, pl. 32, figs 1–7. Description: Valves broadly elliptical to almost rhombic, 16–25 μm long, 12–18 μm wide. SV: sternum narrow and linear, and central area not developed. Transapical striae parallel at middle, strongly radiate towards the apices, and interrupted by many slightly undulate hyaline lines, 37–41 in 10 μm. RV: raphe straight, the central ends of raphe slightly curved to the opposite directions, the terminal ends of the raphe distant from the apices without areolation and sternum narrow. Central area expanded transversely to less than half the hemivalve, and central nodule between the central raphe ends thickened. Under the LM, only the thickened central nodule highlighted, making the central area more narrow than it really is. Transapical striae parallel in the middle, strongly radiate towards the apices, 26–31 in 10 μm of stria, often 1–2 striae in the middle of one side of the valve particularly short. Remarks: Cocconeis convexa is pantropical, and described from the Pacific and Indian Oceans (Witkowski et al. 2000), Guam in the western Pacific Ocean (Navarro & Lobban 2009), Réunion and Rodrigues in the western Indian Ocean (Riaux-Gobin et al. 2011), and Tahiti and Tuamotu Archipelago of the southern Pacific Ocean (Riaux-Gobin et al. 2015). The species has been reported from the coasts of Japan (Suzuki 2001), Argentina (Sar et al. 2003), Mexico (Siqueiros-Beltrones & Argumedo-Hernández 2015). In South Korea, it was already reported in the coast of Jeju Island (Kim et al. 2017), and in this survey, was found frequently as epiphytes on seaweeds along the Seogwipo coast. : Published as part of Joh, Gyeongje, 2021, Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea, pp. 149-179 in Phytotaxa 528 (3) on page 154, DOI: 10.11646/phytotaxa.528.3.1, http://zenodo.org/record/5788071 : {"references": ["Giffen, M. H. (1967) Contributions to the diatom flora of South Africa III. Diatoms of the marine littoral regions at Kidd's Beach near east London, Cape Province, South Africa. Nova Hedwigia 13: 245 - 292, pls. 59 - 63.", "Witkowski, A., Lange-Bertalot, H. & Metzeltin, D. (2000) Diatom flora of marine coasts I. Iconographia Diatomologica Vol. 7. A. R. G. Ganter Verlag K. G., Ruggell. 925 pp.", "Riaux-Gobin, C., Compere, P. & Al-Handal, A. Y. (2011) Species of the Cocconeis peltoides group with a marginal row of unusual processes (Mascarenes and Kerguelen Islands, Indian Ocean). Diatom Research 26: 325 - 338. https: // doi. org / 10.1080 / 0269249 X. 2011.639559", "Navarro, J. N. & Lobban, C. S. (2009) Freshwater and marine diatoms from the western Pacific islands of Yap and Guam, with notes on some diatoms in damselfish territories. Diatom Research 24: 123 - 157. https: // doi. org / 10.1080 / 0269249 X. 2009.9705787", "Riaux-Gobin, C., Compere, P. & Jordan, R. W. (2015) Cocconeis Ehrenberg assemblage (Bacillariophyceae) from Napuka Atoll (Tuamotu Archipelago, South Pacific) with descriptions of two new taxa. Diatom Research 30: 175 - 196. https: // doi. org / 10.1080 / 0269249 X. 2015.1021839", "Sar, E. A., Romero, O. & Sunesen, I. (2003) Cocconeis Ehrenberg and Psammococconeis Garcia (Bacillariophyta) from the Gulf of San Matias, Patagonia, Argentina. Diatom Research 18: 79 - 106. https: // doi. org / 10.1080 / 0269249 X. 2003.9705575", "Siqueiros-Beltrones, D. A. & Argumedo-Hernandez, U. (2015) Epiphytic diatoms grazed by adult abalone (Haliotis spp.) in Baja California Sur, Mexico. Revista Mexicana de Biodiversidad 86: 111 - 122. [in Spanish] https: // doi. org / 10.7550 / rmb. 47977", "Kim, B. S., Kim, S. Y., Park, J. G. & Witkowski, A. (2017) New records of the diatom species (Bacillariophyta) from the seaweed and tidal flats in Korea. Korean Journal of Environmental Biology 35: 604 - 621. https: // doi. org / 10.11626 / KJEB. 2017.35.4.604"]}