Gomphonema pumilum (Grunow) E. Reichardt & Lange-Bertalot (1991: 528)

Amaral, Mailor Wellinton Wedig, Medeiros, Gabriela, Daufenbach, Vanessa, Sampaio, Silvio Cesar, Reis, Ralpho Rinaldo Dos, Ludwig, Thelma Alvim Veiga & Bueno, Norma Catarina, 2024, Taxonomy of epilithic diatoms and teratological forms under the presence of metals in surface sediment, Phytotaxa 647 (3), pp. 237-273 : 250

Gomphonema pumilum (Grunow) E. Reichardt & Lange-Bertalot (1991: 528)

Fig. 6 : AM

Length: 24.8 µm; width: 4.9 µm; striae: 12 in 10 µm (n = 1)

Teratological form: deformed valve outline, with bent of the valve.

Occurrence: S8.

Ecological characteristics: Cond.: 44.00 µS cm –1; BOD: 3.27 mg L− 1; COD: 11.05 mg L− 1; N-NH: 18 µg L− 1; NO: 0.32 mg L− 1; DO: 3 3 − 1 − − 1 − 1 − 1 3 13.39 mg L; pH: 6.43; PO: 0.004 mg L; TP: 0.007 mg L; TS: 42.00 mg L; Temp.: 17.71 °C; Turb.: 8.27; Flow: 1.12 m s; 4 Average depth: 0.33 m; Prec.: 9.96 mm.

Metal concentrations: Co: 34.35–39.39 mg L –1; Cr: 28.18–85.31 mg L –1; Cu: 170.55–264.18 mg L- 1; Mn: 503.78–606.73 mg L –1; Ni: 32.81–73.27 mg L –1; Pb: 31.05–39.31 mg L –1; Zn: 79.00– 172.60 mg L –1.

Figures

FIGURE 6. Epilithic diatoms from Cascavel River micro-watershed in LM. A–B. Gomphonema affine. C–H. G. angustatum. F–H. Teratological valves. I. G. brasiliense. J–K. G. brasiliense subsp. pacificum. L. G. brasiliensoide. M–O. G. exilissimum. P–R. G. parvulum. S. G. frequentiformis. T–Y. G. graciledictum. W–Y. Teratological valves. Z. G. perapicatum. AA–AB. G. hawaiiense. AC. G. guaraniarum. AD–AF. G. saprophilum. AG–AI. G. pseudoaugur. AJ–AM. G. pumilum. AM. Teratological valve. AN–AS. G. lagenula. AQ–AS. Teratological valves. AT–AU. G. naviculoides. AU. Teratological valve. Scale bars: 10 µm.