Pseudogomphonema kamtchaticum Medlin 1986

• Main Authors: Al-Handal, Adil Y., Torstensson, Anders, Wulff, Angela
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Chromista; Ochrophyta; Bacillariophyceae; Naviculales; Naviculaceae; Pseudogomphonema; Pseudogomphonema kamtchaticum; Antarc*; Antarctica; King George Island
• Online Access: https://doi.org/10.5281/zenodo.11094473; http://treatment.plazi.org/id/03C487C5430A737EFF5FFBDA70FE9ED7

Pseudogomphonema kamtchaticum (Grunow) Medlin (Figures 72, 73) Literature: (Al-Handal and Wulff 2008b, p. 430, figs. 95– 100; Medlin and Round 1986, p. 216, figs. 64–70; Witkowski et al. 2000, p. 343, pl. 60, figs. 13–16). Description: Length 40–65 µm, width 5.5–10 µm, striae 12– 14 in 10 µm. Remarks: Specimens observed in Potter Cove possess less dense striae than reported for this species which normally range between 16 and 23 in 10 µm (Medlin and Round 1986; Scott and Thomas 2005). Specimens smaller than 40 µm were not observed although it might be as small as 18 µm. Ecology and distribution: This is a marine species mostly found as epiphytic and rarely on the sediment, also reported from the Arctic (Klochkova et al. 2014). Frequent in Potter Cove. Trachyneis aspera (Ehrenberg) Cleve (Figure 74) Literature: (Cardinal et al. 1984, p. 391, figs. 98–102; Hendey 1964, p. 236, pl. 29, fig. 13; Witkowski et al. 2000, p. 355, pl. 159, figs. 1–6, 9). Description: Length 62–104 µm, width 12–15 µm, striae 14–16 in 10 µm. Remarks: A species with variable outline and wide size variation. Specimens observed in the present study had denser striae than normally found in this species (6–8 in 10 µm) and vary from previous observations in the same region (9–11 in 10 µm, Al-Handal and Wulff 2008b). Ecology and distribution: A widely distributed marine littoral species. Recorded from the sub-Arctic and the Arctic (Cardinal et al. 1984; von Quillfeldt 2000). Frequent in Potter Cove. Published as part of 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, pp. 81-103 in Botanica Marina (Warsaw, Poland) (Warsaw, Poland) 65 (2) on page 93, DOI:10.1515/bot-2021-0066, http://zenodo.org/record/11000147