Roholtiella fluviatilis Johansen et Gaysina, 2015
|
publication ID |
https://doi.org/ 10.11646/phytotaxa.197.2.2 |
|
persistent identifier |
https://treatment.plazi.org/id/038E3E76-FFD3-A12E-DFCB-E3E8EC1EFC47 |
|
treatment provided by |
Felipe |
|
scientific name |
Roholtiella fluviatilis Johansen et Gaysina |
| status |
sp. nov. |
Roholtiella fluviatilis Johansen et Gaysina , spec. nov. ( Figs. 2P–X View FIGURE 2 )
Morphologically most similar to R. bashkiriorum , from which it differs by living on rocks in rivers or on sediment at the water’s edge of rivers. Differing from all other species by being aquatic or hydroterrestrial. Differing from all other species in the sequence of the flanking regions of the Box-B and V3 helices of the 16S-23S ITS region ( Fig. 5 View FIGURE 5 ).
Type: — Russia. Macroscopic growth of algae and cyanobacteria on riverside of river Ik on the edge of the village Bolsheustikinskoye, Republic of Bashkortostan, L.A. Gaysina, August 2010 (holotype: CBFS! A-038-1). Reference strain: CCALA 1058.
Description: —Thallus flat or unevenly spreading, olive-green, blackish-green to orange green. Filaments short to long, single ( Fig. 2W View FIGURE 2 ) or sometimes double ( Fig. 2R View FIGURE 2 ) false branched. Sheath thin, attached, sometimes widened, colorless, orange to reddish. Trichomes constricted at crosswalls, not tapered to clearly tapered Calothrix -like with basal heterocyte ( Fig. 2S View FIGURE 2 ), not distinctly swollen at the base, 7.9–9.8 μm wide in the widest portions. Cells shorter than wide up to longer than wide, barrel-shaped, with smooth or finely granulated content, olive-green, blue-green, grey-green, orange-green to orange, 2.8–10.8 μm long. End cells rounded ( Figs. 2U, W, X View FIGURE 2 ) or conical ( Fig. 2P View FIGURE 2 ), 3.9–6.9 μm wide, 4.1–6.4 μm long. Heterocytes terminal hemispherical ( Fig. 2S View FIGURE 2 ), or intercalary rounded cylindrical, yellowish, 4.3–7.4 μm wide, 3.2–6.8 μm long. Arthrospores or short rows of arthrospores released from the ends of the filaments ( Fig. 2Q View FIGURE 2 ), with smooth, unevenly distributed cell content, spherical compressed to almost spherical. Hormogonia observed only rarely, 5.2–6.0μm wide, 2.8–4.0 μm long.
Habitat: —In mid-order streams or in hydroterrestrial communities at the water’s edge of such streams.
Etymology: —From the Latin fluviatilis (= river-inhabiting), referring to the habitat of origin of the taxon.
Other strains: —UAM 332, UAM 334, UAM 337, UAM 340
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.