Lamprospora gibbosa M.Vega & Janošík, 2021
|
publication ID |
https://doi.org/ 10.5252/cryptogamie-mycologie2021v42a6 |
|
persistent identifier |
https://treatment.plazi.org/id/4402CB28-FFB2-F44E-FCA4-FF78F22DFD1B |
|
treatment provided by |
Felipe |
|
scientific name |
Lamprospora gibbosa M.Vega & Janošík |
| status |
sp. nov. |
Lamprospora gibbosa M.Vega & Janošík View in CoL , sp. nov.
MYCOBANK NUMBER. — MB835294
ETYMOLOGY. — gibbosa refers to the gibbous warts of the ascospore ornamentation.
DIAGNOSIS. — Lamprospora gibbosa sp. nov. differs from other species of Lamprospora by its ascospores with an ornamentation densely covered with gibbous warts together with an infection on rhizoids of its host Fissidens crassipes Wilson ex Bruch & Schimp.
HOLOTYPE. — France, Vergons (Alpes-de-Haute-Provence), L’Iscle, torrent La Galange, 43°55’54”N, 6°38’44”E, 900 m alt., on rocks in a mountain brook, 13.X.2017, leg. MV. Host: Fissidens crassipes , accompanying bryophytes: Hygrohypnum luridum (Hedw.) Jenn. , Pohlia melanodon (Brid.) A.J.Shaw. (holotypus B 70 0100017, isotypus PRC 4626).
ADDITIONAL SPECIMENS EXAMINED. — France, Vergons (Alpes-de-Haute-Provence), L’Iscle, torrent La Galange, 43°55’54”N, 6°38’44”E, 900 m alt., on rocks in a stream. 13.X.2017, leg. MV. Host: F. crassipes (paratypus, B 70 0100015); France, Ubraye (Alpes-de-Haute-Provence), ruisseau La Bernade, 43°55’37”N, 6°40’0”E, 820 m alt., on rocks in a stream. 03.X.2017, leg. MV. Host: F. crassipes (paratypus B 70 0100016); France, Cléron (Doubs), ravin de Valbois, 47°05’32”N, 6°04’52”E, 330 m alt., on rocks in a stream. 05.X.2020, leg. Andgelo Mombert. Host: F. cf. crassipes ( PRC 4665). Add. collection: 10.X.2020 (personal herbarium Gilbert Moyne, GM-20200901); France, Amancey (Doubs), source de Comboyer, 47°02’36”N, 6°05’05”E, 550 m alt., on banks of a stream, 06.X.2020, leg. Andgelo Mombert. Host: Fissidens sp. (no material preserved); France, Amondans (Doubs), cascade de l’Adhuy, 47°03’55”N, 6°23’59”E, 330 m alt., on banks of a stream. 10.X.2020, leg. Andgelo Mombert & Gilbert Moyne. Host: F. crassipes (GM-20200902). Add. collection: 22.X.2020, leg. Andgelo Mombert ( PRC 4666).
MACROSCOPIC FEATURES ( Fig. 5 View FIG A-D)
Apothecia gregarious on F. crassipes growing on rocks, sessile, 0.5-1.5(2) mm in diameter, first spherical, becoming cup-shaped, finally discoid with an inconspicuous fimbriate margin or no raised margin at all; hymenium bright-orange, outer surface slightly paler than the hymenium.
MICROSCOPIC FEATURES ( Figs 6 View FIG , 7 View FIG )
Asci
Straight,cylindrical,narrowing toward base, 200-350×16-28 µm, operculate, IKI-, arising from perforated croziers, 8-spored.
Spores
Hyaline, uniseriate, globose, (14)15-17 µm diam., with an excentric lipid drop 9-11 µm in diameter. Spore surface densely covered with isolated warts of varying size. Warts in side view hemispherical, gibbous, in face view also pyriform, packed, elongated or confluent, few warts with a punctiform cavity visible after staining in CB. Larger warts wider than high, 2-3(4) µm wide and 0.6-1(1.2) µm high; smaller warts ± hemispherical, approx. 0.5 µm wide and 0.5 µm high.
Paraphyses
Filiform, cylindrical, straight, 3-5 µm wide, multiseptate, occasionally branched at the base, with sparse carotenoid pale-orange pigment, mostly in lipid bodies (LBs), pigment turns green in
IKI, apical cell slightly thickened, 40-80 ×4-7 µm with colourless slightly refractive vacuolar bodies (VBs) of 1-2.5 µm in diameter.
Structure of the apothecium
Ectal excipulum consisting of a textura angularis of mostly thin-walled cells 20-40 × 17-30 µm, cells of the outer edge thick-walled, with cell walls 1-1.5 µm thick. Medullary excipulum consisting of a textura intricata with thin-walled cells 10-40 × 5-8 µm. Margin consisting of a textura prismatica.
INFECTION ( Fig. 8C, D View FIG )
Lamprospora gibbosa sp. nov. infects the rhizoids of the aquatic moss Fissidens crassipes , infected cells appear swollen and shorter than uninfected ones. The ellipsoid single-celled appressoria are 13-22 × 6-14 µm in side view. They are mostly free and only weakly differentiated from adjacent hyphae. From the appressorium an infection peg grows through the rhizoid wall forming a ramified haustorium inside the host cell.
HABITAT AND OCCURRENCE ( Fig. 5E, F View FIG )
All collections of L. gibbosa sp. nov. were found on F. crassipes colonizing siliceous rocks in streams shaded by the riparian vegetation. Infected moss plants grew at or below water level and often were densely coated with lime. On the occasion of an excursion to the localities in southern France nine months later in May 2018, the boulders inhabited by F. crassipes were entirely submerged.
Fissidens crassipes View in CoL occurs on rocks and walls in or alongside streams and rivers with a preference for basic and calcareous bases. It is somewhat pollution resistant and can even live in canals, irrigation channels or fountains. Fissidens crassipes View in CoL is frost-sensitive ( Florschütz et al. 1972) and, in Europe, has a southern-temperate distribution with southern Scandinavia as the northern limit. It further occurs in Macaronesia, Asia, North and Central Africa and Australia but is missing in North America ( Smith 2004; Pursell 2007; Ros et al. 2013).
| MV |
University of Montana Museum |
| B |
Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet |
| PRC |
Charles University in Prague |
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.