Planothidium quarnerensis f. rhombica (Giffen) Witkowski & Riaux-Gobin

Joh, Gyeongje, 2021, Distribution and frequent occurrence of diatom taxa (Bacillariophyta) inhabiting warmer oceans in Seogwipo coast of Jeju Island, southernmost Korea, Phytotaxa 517 (1), pp. 1-67 : 25

publication ID

https://doi.org/ 10.11646/phytotaxa.517.1.1

DOI

https://doi.org/10.5281/zenodo.8072005

persistent identifier

https://treatment.plazi.org/id/1304879D-DB2C-ED2D-EAF6-2E970BBCFCF3

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Plazi

scientific name

Planothidium quarnerensis f. rhombica (Giffen) Witkowski & Riaux-Gobin
status

 

33. Planothidium quarnerensis f. rhombica (Giffen) Witkowski & Riaux-Gobin ( Figs 89, 90 View FIGURES 78–90 )

Basionym: Cocconeis quarnerensis f. rhombica Giffen.

Type locality: Mahé Island, Seychelles .

Reference: Riaux-Gobin et al. 2018, p. 117, figs 45–48.

Morphomerics: Valves 13–24 (15–18) μm long, 7–11 (10–11) μm wide, transapical striae 10–11 (8–9) in 10 μm of sternum valve, 11–12 (9) in 10 μm of raphe valve.

Remarks: The structure of vestigial striae is distinct in the axial area of sternum valve. Local specimens are slightly longer, but narrower in width, compared with the type ones. This taxon was reported only from the type locality, Mahé Island of the Seychelles, and probably tropical taxon in warmer coasts. It was rare epiphytes on seaweeds along the Seogwipo coast in Jeju Island, and this is a new report to South Korea.

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