Achnanthidium minutissimum (Kützing) Czarnecki (1994: 157)

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

publication ID	https://doi.org/10.11646/phytotaxa.647.3.3
DOI	https://doi.org/10.5281/zenodo.14743473
persistent identifier	https://treatment.plazi.org/id/C92C87AE-FFF0-FFF5-FF2B-FB88C35BFA11
treatment provided by	Felipe (2024-08-02 12:46:12, last updated 2025-01-26 20:25:14)
scientific name	Achnanthidium minutissimum (Kützing) Czarnecki (1994: 157)
status

Treatment

Figs 7 View FIGURE 7 : X–AC

Length: 6.1–14.7 μm; width: 2.5–3.4 µm (n = 38)

Teratological form: deformed valve outline, usually with constriction or bent apices. Sometimes with strong constriction in the median portion of the valve. Sigmoid shape, or unidentified.

Occurrence: S1, S2, S3, S4, S6, S7.

Ecological characteristics: Cond.: 25.00–91.00 µS cm –1; BOD: 0.77–9.90 mg L− 1; COD: 1.00– 24.32 mg L− 1; N-NH: 200–540 µg L− 1; 3 − 1 − 1 − − 1 − 1 NO: 0.37–13.60 mg L; DO: 6.54–19.35 mg L; pH: 5.01–6.92; PO: 0.005 –0.050 mg L; TP: 0.005 –0.922 mg L; TS: 3 4 19.00–174.00 mg L− 1; Temp.: 17.40–23.56 °C; Turb.: 0.06–37.50; Flow: 0.10–5.09 m 3 s; Average depth: 0.04–0.41 m; Prec.: 2.37–11.17 mm.

Metal concentrations: Co: 16.73–58.28 mg L –1; Cr: 21.98–85.31 mg L –1; Cu: 160.64–292.30 mg L –1; Mn: 347.86–745.82 mg L –1; Ni: 27.57–85.63 mg L –1; Pb: 33.49–66.21 mg L –1; Zn: 73.15–412.52 mg L –1.

References

Czarnecki, D. B. (1994) The freshwater diatom culture collection at Loras College, Dubuque, Iowa. Memoirs of the California Academy of Sciences 17: 155 - 174.

Figures

FIGURE 7. Epilithic diatoms from Cascavel River micro-watershed in LM. A. Placoneis elginensis. B. P. hambergii. C. P. undulata. D. Achnanthes inflata. E–G. Achnanthidium caledonicum. H–P. A. macrocephalum. L–P. Teratological valves. Q–T. A. tropicocatenatum. U–AC. A. minutissimum. X–AC. Teratological valves. AD–AH. A. modestiforme. AF–AH. Teratological valves. AI–AJ. Gogorevia constricta. AK. Planothidium bagualensis. AL. P. lagerheimii. AM–AP. P. rostratum. AO–AP. Teratological valves. AQ–AR. P. frequentissimum. AS–AT. Psammothidium hustedtii. AU–AV. Humidophila arcuatoides. AW. H. implicata. AX–AZ. H. contenta. AAA– AAC. H. subtropica. AAD. Cocconeis fluviatilis. AAE. C. lineata. AAF. Luticola ectorii. AAG. L. hustedtii. AAH. L. charlatii. AAI– AAJ. L. permuticoides. AAK. L. ventricosa. AAL–AAN. L. goeppertiana. Scale bars: 10 µm.