Nitzschia sigma (Kützing) W. Smith

Al-Handal, Adil Y., Torstensson, Anders & Wulff, Angela, 2022, Revisiting Potter Cove, King George Island, Antarctica, 12 years later: new observations of marine benthic diatoms, Botanica Marina (Warsaw, Poland) 65 (2), pp. 81-103 : 97

publication ID	https://doi.org/ 10.1515/bot-2021-0066
DOI	https://doi.org/10.5281/zenodo.11094507
persistent identifier	https://treatment.plazi.org/id/03C487C5-4316-7362-FCCD-FE9877EC9C6F
treatment provided by	Felipe
scientific name	Nitzschia sigma (Kützing) W. Smith
status

Treatment

Nitzschia sigma (Kützing) W. Smith ( Figure 100 View Figures 93–106 ) Literature: ( Hendey 1964, p. 281, 282, pl. 42, fig. 1; Witkowski et al. 2000, p. 404, pl. 206, figs. 1–10).

Description: Length 82–105 µm, width 14–18 µm, striae 32– 34 in 10 µm, fibulae 5–6 in 10 µm.

Remarks: A species with a wide variation in valve outline, striae and fibulae density. The observed specimens bear coarser and less dense fibulae, Krammer and Lange-Bertalot (1988) reported 7–12 fibula in 10 µm while Hendey (1964) reported eight in 10 µm.

Ecology and distribution: A widely distributed marine and brackish-water species. reported from the Arctic as sea-ice diatoms (Wiktor et al. 1998). Not found previously in Potter Cove. Rare in the material examined.