Compare

Valves of B. wygaschii are more rhombic in valve outline than B. neoactuta, with a large central area and a lower stria density (20-24 in 10 µm). Valves of B. metzeltinii are more narrow and shorter in length (26-37 µm) and have a higher stria density (27-30 in 10 µm). Brachysira liliana valves have a higher density of stria and areolae, along with a longitudinally expanded central area.

LM scalebar = 10 µm
Cana  Lm 78270 016  Na Cana  Lm 78274 007  Na Cana  Lm 78274 014  Na Cana  Lm 78274 005  Na Cana  Lm 78274 020  Na Cana  Lm 78270 012  Na Cana  Lm 78274 016  Na
Length Range
31-51 µm
Width Range
6.5-9 µm
Striae in 10 µm
24-26

Also compare to

Brachysira liliana

Lange-Bert. in Lange-Bert. and Gerd Moser

Brachysira metzeltinii

Lange-Bert. in Lange-Bert. and Gerd Moser

Brachysira wygaschii

Lange-Bert. in Lange-Bert. and Gerd Moser