Luffisphaera  lanceolata Belcher & Swale, 1975

Diagnosis: With the characters of the genus. Cells spherical or oval, ca. 2.6-2.7 µm in diameter. Basal parts of the scales oval, dish-shaped, about 0.4 µm long by 0.12 µm in depth, the sides perforated with three, sometimes two rows of large rounded holes. The upper rim is strongly raised at the edges. The outer scales are 2.0 µm in length, narrowly lanceolate, broadest near the bottom (0.1-0.2 µm), the tip widening slightly to a truncate apex. The whole of the outer scale, except for the short transition zone immediately above the basal rim, shows delicate transverse thickened bands, which may form a spiral. The infilling reticulum has a single row of rectangular windows between adjacent bands.

Ecology: freshwater, Great-Britain