Rhabdonema arcuatum (Lyngbye) Kützing

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 : 89

Rhabdonema arcuatum (Lyngbye) Kützing ( Figure 36 )

Literature: ( Hendey 1964, p. 172, pl. 35, figs. 10–12; Poulin et al. 1984b, p. 284, figs. 54, 56–59; Witkowski et al. 2000, p. 76, pl. 13, figs. 2–4).

Description: length 86–92, width 8–12 µm, striae 6–8 in 10 µm.

Remarks: Three specimens were observed in the whole material. This is an epiphytic species and seldom found in the plankton or attached to sediment grains.

Ecology and distribution: A marine species mostly found in warm and temperate waters but also reported from the sub-Arctic ( Poulin et al. 1984b) and the Arctic ( von Quillfeldt 2000) and from Antarctica (Al-Handal and Wulff 2008b). Rare in Potter Cove.

Figures

Figures 27–38: Marine benthic diatoms in Potter Cove, King George Island, Antarctica, summer 2015. (27) Corethron pennatum. (28) Fragilaria striatula. (29) Synedropsis sp. (30) Licmophora antarctica. (31–32) Licmophora belgicae. (33) Licmophora gracilis. (34) Licmophora luxuriosa. (35) Thalassionema nitzschioides. (36) Rhabdonema arcuatum. (37, 38) Entopyla ocellata.