Encyonema silesiacum (Bleisch) D.G.Mann (1990: 667)

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 : 246-248

Encyonema silesiacum (Bleisch) D.G.Mann (1990: 667)

Fig. 5 : AA

Length: 31.5 µm; width: 8.5 µm; striae: 11 in 10 µm (n = 1)

Teratological form: deformed valve outline, with slight constriction in the median portion of the valve, on the ventral side.

Occurrence: S2.

Ecological characteristics: Cond.: 70.00 µS cm –1; BOD: 1.00 mg L− 1; COD: 2.62 mg L− 1; N-NH: 200 µg L− 1; NO: 3.30 mg L− 1; DO: 3 3 − 1 − − 1 − 1 − 1 3 15.81 mg L; pH: 6.30; PO: 0.05 mg L; TP: 0.005 mg L; TS: 174.00 mg L; Temp.: 18.28 °C; Turb.: 2.47; Flow: 0.88 m 4 s; Average depth: 0.14 m; Prec.: 2.37 mm.

Metal concentrations: Co: 17.50 mg L –1; Cr: 79.78 mg L –1; Cu: 244.29 mg L –1; Mn: 370.99 mg L –1; Ni: 66.65 mg L –1; Pb: 33.49 mg L –1; Zn: 146.17 mg L –1.

Figures

FIGURE 5. Epilithic diatoms from Cascavel River micro-watershed in LM.A. Eunotia ossicula. B–G. E. rhomboidea. E–G. Teratological valves. H. E. tropico-arcus. I–K. E. veneris. L. E. yanomami. M–P. E. yberai. N–P. Teratological valves. Q. Cymbopleura naviculiformis. R–S. Encyonema angustecapitatum. T. E. perpusillum. U. E. neogracile. V–X. E. neomesianum. X. Teratological valve. Y–AA. E. silesiacum. AA. Teratological valve. AB. E. minutiforme. AC–AE. E. exuberans. AF–AH. Navigeia ignota. AI–AK. Placogeia kriegeri. AL–AM. Encyonopsis subminuta. AN–AO. E. difficilis. AP. E. schubartii. AQ–AS. E. thienemannii. AT–AU. Geissleria punctifera. AV. Kurtkrammeria spicula. Scale bars: 10 µm.