Achnanthes groenlandica Grunow 1880

• 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; Achnanthales; Achnanthaceae; Achnanthes; Achnanthes groenlandica; Antarc*; Antarctica; King George Island
• Online Access: https://doi.org/10.5281/zenodo.11000213; http://treatment.plazi.org/id/03C487C5430F737BFF71FC3F71B19920

Achnanthes cf. groenlandica (Cleve) Grunow (Figures 43–46) Literature: (Witkowski et al. 2000, p. 89, pl. 44, figs. 1–7). Description: Length 56–82 µm, width 11–15 µm, striae 5–6 in 10 µm. Remarks: This species looks similar to Achnanthes groenlandica in valve outline, dimensions and striae density, but differs in the shape and size of the central area where it is larger and slightly depressed in the area between raphe proximal endings. Raphe endings penetrate into the central area and not on its outer edge. A similar species has recently been described as epizoic on turtles, Achnanthes squaliformis Majewska et Van de Vijver (Majewska et al. 2017) but this species possesses denser striae and an axial area pushed to the side on the rapheless valve. Ecology and distribution: Achnanthes groenlandica is a widely distributed marine species which may live attached to sediment grains or as an epiphyte. Also recorded from the Arctic (Pearce et al. 2014). 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 90, DOI:10.1515/bot-2021-0066, http://zenodo.org/record/11000147