Discostella stelligera (Cleve & Grunow) Houk & Klee (2004: 208)

Figs 3: D–E

Diameter: 9.9–16.9 µm; striae: 13–14 in 10 µm (n = 2)

Teratological form: duplication of the stellate pattern of the alveoli in the central area.

Occurrence: S3.

Ecological characteristics: Cond.: 47.00 µS cm –1; BOD: 3.00 mg L− 1; COD: 15.50 mg L− 1; N-NH3: 200 µg L− 1; NO: 1.40 mg L− 1; DO: 3 − 1 − − 1 − 1 − 1 3 16.30 mg L; pH: 6.05; PO: 0.022 mg L; TP: 0.05 mg L; TS: 58.00 mg L; Temp.: 18.31 °C; Turb.: 7.26; Flow: 0.93 m s; 4 Average depth: 0.15 m; Prec.: 2.73 mm.

Metal concentrations: Co: 33.57 mg L –1; Cr: 27.33 mg L –1; Cu: 197.55 mg L –1; Mn: 398.50 mg L –1; Ni: 31.80 mg L –1; Pb: 46.56 mg L –1; Zn: 93.81 mg L –1.