Luticola bryophila M.Rybak, Czarnota & Noga, 2023

Rybak, Mateusz, Czarnota, Pawel & Noga, Teresa, 2023, Study of terrestrial diatoms in corticolous assemblages from deciduous trees in Central Europe with descriptions of two new Luticola D. G. Mann taxa, PhytoKeys 221, pp. 1-40 : 1

Luticola bryophila M.Rybak, Czarnota & Noga sp. nov.

Fig. 2

Description.

Rectangular in girdle view. Valves linear to linear lanceolate with weakly protracted and moderately rounded apices, smaller specimens without protracted apices. Valve length 10-25 µm, and valve width 4-6 µm. Axial area narrow linear, slightly expanded near central area. Central area wide and rounded, bordered by 3-4 areolae. Ghost areolae commonly present in central area. Round isolated pore located half way between valve center and margin. Raphe branch straight with both endings clearly curved to site opposite to isolated pore. Distal raphe endings short, not continuing onto mantle. Internal raphe slit simple and straight, distal endings form slightly developed helictoglossae. Striae number 18-20 in 10 µm composed of 2-3 same sized, rounded to slightly elongated areolae. Single row of areolae present also on valve mantle. Internally areolae covered by hymen forming continuous strip, separated by not thickened virgae. Internally small lipped opening of isolated pore visible. Marginal channel located on valve face/mantle junction occluded by hymenes and visible internally.

Type material.

Holotype: Slide SZCZ 28844 and unmounted material with the same number stored in A. Witkowski Diatom Collection of the Institute of Marine and Environmental Sciences, University of Szczecin, holotype specimen designated here in Fig. 3K

Isotype: Slide no. 2017/18 and unmounted material with the same number at the University of Rzeszów, Poland.

Type locality.

Stalowa Wola, Podkarpacie Province, Poland, 50°34'16.4"N, 22°04'18.6"E, leg. M. Rybak.

Etymology.

The name refers to the occurrence of the species mainly in terrestrial bryophytes.

Distribution.

Species observed at most of the sites studied, always in single specimens, mainly in samples of bryophytes from trunk bases.

Similar species.

Luticola sparsipunctata Levkov, Metzeltin & Pavlov ( Levkov et al. 2013, p. 222); Luticola tenuis Levkov, Metzeltin & Pavlov ( Levkov et al. 2013, p. 236).

Figures

Figure 2. Luticola bryophila sp. nov., LM microphotographs of girdle view (A) and size diminution series (B-X), black frame indicate the holotype specimen. SEM microphotographs (Y-AB) of valve in external (Y-AA) and internal view (AB). Scale bars: 10 µm (A-X); 5 µm (Y-AB).

Figure 3. Luticola confusa sp. nov., LM microphotographs of size diminution series (A-X), black frame indicate the holotype specimen. SEM microphotographs (Y-AB), valve in external (Y-AA) and internal view (AB). Scale bars: 10 µm (A-X); 5 µm (Y, Z, AB),