Thalassiosira oceanica Hasle

Thalassiosira oceanica Hasle (1983): 220, table 1, figs. 1–18 — Harris et al. (1995): 121, figs. 8, 26; Hasle and Syvertsen (1997): 56, 57, table 7; Bérard-Therriault et al. (1999): 26, pl. 11 d; Hoppenrath et al. (2007): 59, fig. 24 a; Li et al. (2014): 390, fig. 62.

Description

Cells rectangular in girdle view, pervalvar axis slightly shorter than cell diameter 6.8–7.3 (3.0–12.0) µm. Valve has fine ornamentation of silicious radial ribs and poroidal areolation, 50–60 (40–60) areolae in 10 µm. Valve has undulating marginal ridge. One central strutted process, located slightly sub-central. Single marginal ring of 4–6 (3–8) relatively widely spaced strutted processes in 10 µm without external tubes, 2 µm apart. One labiate process close to one marginal strutted process. Valve rim has ribs.

Notes

The morphometric data of this specimen fit the description in literature and is supported by molecular data. iNaturalist ID: 259589003. Mol. data: SRS 968559, SRS 964086, SRS 966570, SRS 1690317, SRS 966764, SRS 969492, SRS 968562, SRS 966566, SRS 968542, SRS 966614, SRS 967659, SRS 968132, SRS 964211, SRS 966901 (Fig. 41).