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.