Humidophila arcuatoides (Lange-Bertalot) R.L. Lowe et al. (2014: 357)

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 : 251

publication ID	https://doi.org/10.11646/phytotaxa.647.3.3
DOI	https://doi.org/10.5281/zenodo.14743479
persistent identifier	https://treatment.plazi.org/id/C92C87AE-FFF3-FFF6-FF2B-F963C1F1F80F
treatment provided by	Felipe (2024-08-02 12:46:12, last updated 2025-01-26 20:25:14)
scientific name	Humidophila arcuatoides (Lange-Bertalot) R.L. Lowe et al. (2014: 357)
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* Humidophila arcuatoides (Lange-Bertalot) R.L. Lowe et al. (2014: 357)

Figs 7 View FIGURE 7 : AU–AV

Length: 12.1–14.6 µm; width: 2.9–3.2 µm (n = 2)

Taxonomical remarks: Humidophila arcuatoides (= Diadesmis arcuatoides ), described originally by Werum & Lange-Bertalot (2004), has 16–26 µm in length and 5–6 µm in width, however, the taxon has been already registered with 8–14 µm in length and 2.6–4 µm in width by Wetzel (2011). Humidophila arcuata Lange-Bertalot is easily differentiated by the less inflated central portion of the valve ( Werum & Lange-Bertalot 2004).

Teratological form: not observed.

References

Lowe, R. L., Kociolek, P., Johansen, J. R., Van De Vijver, B., Lange-Bertalot, H. & Kopalova, K. (2014) Humidophila gen. nov., a new genus for a group of diatoms (Bacillariophyta) formerly within the genus Diadesmis: species from Hawai'i, including one new species. Diatom Research 29: 351 - 360. https: // doi. org / 10.1080 / 0269249 X. 2014.889039

Werum, M. & Lange-Bertalot, H. (2004) Diatoms in Springs from Central Europe and elsewhere under the influence of hydrogeology and anthropogenic impacts. Iconographia Diatomologica 13: 1 - 417.

Wetzel, C. E. (2011) Biodiversidade e distribuicao de diatomaceas (Ochrophyta, Bacillariophyceae) na bacia hidrografica do Rio Negro, Amazonas, Brasil. Instituto de Botanica da Secretaria do Meio Ambiente, 1876 pp.

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.