Humidophila gallica (W.Smith) R.L.Lowe et al., 2017

Chattová, Barbora, Lebouvier, Marc & Vijver, Bart Van De, 2018, Morphological and taxonomical analysis of the terrestrial diatom genus Humidophila (Bacillariophyta) on Ile Amsterdam and Ile Saint-Paul (Southern Indian Ocean), Phytotaxa 336 (1), pp. 28-42 : 33

publication ID

https://doi.org/ 10.11646/phytotaxa.336.1.2

DOI

https://doi.org/10.5281/zenodo.13721252

persistent identifier

https://treatment.plazi.org/id/03E687A4-B055-FFBC-7AD6-FE7CFB082A30

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Felipe

scientific name

Humidophila gallica (W.Smith) R.L.Lowe et al.
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Humidophila gallica (W.Smith) R.L.Lowe et al. ( Figs 60–79 View FIGURES 60–79 )

Morphological observations:—Frustules are rectangular in girdle view, usually forming long, bandlike colonies, connected by linking spines. Valves are linear-elliptical with bluntly rounded, rarely subcapitate apices. Valve dimensions (n=25): length 8–11.5 μm, width 1.9 – 3.2 μm. Two contrasting valves morphologies are observed. Most valves lacking a raphe system but are showing well-developed marginal spines. Occasionally valves with a normally developed raphe system lacking marginal spines were observed. Striae are not discernible in LM, 34 – 42 in 10 μm, composed (SEM) of one large, transapically elongated areola.

Ecology and associated diatom flora: — Humidophila gallica is a cosmopolitan species, common in terrestrial biotopes such as bryophyte vegetations, wet to semi-dry rock faces, soils and in caves ( Falasco et al. 2014, 2015, Lowe et al. 2017). On Ile Amsterdam, this species was found in high abundance in lava tubes, accompanied by other Humidophila species (mainly H. vidalii and H. contenta ), Rhopalodia rupestris (W. Smith 1853: 14) Krammer in Lange-Bertalot & Krammer (1987: 86) and Orthoseira roeseana ( Rabenhorst 1848 –1860: 383) O’Meara (1875: 255).

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