Achnanthidium peruvianum E. Morales & Ector

Autor: Costa, Lívia F., Wetzel, Carlos E., Maquardt, Gisele C., Zanon, Jaques E., Ector, Luc, Bicudo, Denise C.
Rok vydání: 2022
Předmět:
ISSN: 2381-8107
DOI: 10.5281/zenodo.7434739
Popis: Achnanthidium peruvianum E.Morales & Ector in Morales et al. (2011: 121) (Figs 166–193) Synonym: Achnanthes kryophiloides M.H.Hohn in Patrick et al. (1966), p. 468, pl. 1, Figs 5, 6 Morphometric features:— 8.0–20.2 µm long; 2.3–4.3 µm wide; 28–34 striae in 10 µm; striae mainly composed of 4–5 areolae. Taxonomical remarks:— The species presents similar morphological features to another South American species called Achnanthidium sehuencoensis, which has almost the same valve outline. However, SEM analysis separated the two due to the deflected terminal raphe fissures, the non-expanded central raphe fissures, and lower stria density (20–24/10 µm, Morales et al. 2009) compared to A. peruvianum. Achnanthidium petersenii (Hustedt) C.E.Wetzel, Ector & Jüttner (in Jüttner et al. 2019: 66) has wider fascia on the raphe valve. However, on the rapheless valves, the axial area is moderately broad, and the central area broadly rhombic-lanceolate (Jüttner et al. 2019). In A. peruvianum, the axial area is narrow and linear, while the central area is undifferentiated with short striae (Morales et al. 2011). Distribution and ecological information:— Achnanthidium peruvianum was described from the Rondos River in Peru, South America (Hohn in Patrick et al. 1966). In our samples, the species was rare (abundance
Published as part of Costa, Lívia F., Wetzel, Carlos E., Maquardt, Gisele C., Zanon, Jaques E., Ector, Luc & Bicudo, Denise C., 2022, Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species, pp. 187-223 in Phytotaxa 575 (3) on page 207, DOI: 10.11646/phytotaxa.575.3.1, http://zenodo.org/record/7431242
{"references":["Morales, E. A., Ector, L., Fernandez, E., Novais, M. H., Hlubikova, D., Hamilton, P. B., Blanco, S., Vis, M. L. & Kociolek, J. P. (2011) The genus Achnanthidium Kutz. (Achnanthales, Bacillariophyceae) in Bolivian streams: a report of taxa found in recent investigations. Algological Studies 136 - 137: 89 - 130. https: // doi. org / 10.1127 / 1864 - 1318 / 2011 / 0136 - 0089","Morales, E. A., Fernandez, E. & Kociolek, J. P. (2009) Epilithic diatoms (Bacillariophyta) from cloud forest and alpine streams in Bolivia, South America 3: diatoms from Sehuencas, Carrasco National Park, Department of Cochabamba. Acta Botanica Croatica 68 (2): 263 - 283.","Juttner, I., Wetzel, C. E., Williams, D. M. & Ector, L. (2019) Investigations of the type materials of Achnanthes parallela J. R. Carter and Achnanthes petersenii Hustedt (Bacillariophyceae) with comments on the genus Rossithidium Round & Bukhtiyarova. Botany Letters 167 (1): 57 - 69. https: // doi. org / 10.1080 / 23818107.2019.1668297"]}
Databáze: OpenAIRE
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