Nitzschia mitchelliana Greenleaf

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

Nitzschia mitchelliana Greenleaf ( Figure 96 )

Literature: (Witkowski et al. 2000, p. 394, pl. 193, figs. 1, 2). Description: Length 88–105 µm, width 11–13 µm (center), fibulae 5–6 in 10 µm.

Remarks: The long and short irregularly arranged and more spaced fibulae is the main feature to recognize this species. Ecology and distribution: Perhaps this is a cold-water species, it has been reported from Spitsbergen and Finnmark (Cleve 1883) and Kara Sea (Cleve and Grunow 1891) and is widely spread in the Arctic (Witkowski et al. 2000). Its occurrence in Potter Cove may indicate its bipolar distribution. Rare in the material examined.

Figures

Figures 93–106: Marine benthic diatoms in Potter Cove, King George Island, Antarctica in summer 2015. (93) Nitzschia angularis. (94, 95) Nitzschia australis. (96) Nitzschia mitchelliana. (97) Nitzschia cf. gelida. (98) Nitzschia hybrida. (99) Nitzschia cf. obtusa. (100) Nitzschia sigma. (101) Nitzschia sp. (102) Entomoneis gigantea. (103) Entomoneis kjellmanii. (104) Entomoneis paludosa. (105) Surirella fastuosa. (106) Surirella sp.