Polyblastia subglacialis Riedl
Sydowia, 29, 1-6: 245, 1977.
Synonyms:
Distribution:
Description: Thallus fully endosubstratic, inapparent also under a stereo-microscope, the hyphae few, hyaline, with < 1 μm thick lumina, developing among the crystals of the rock, with very scattered photobiont cells. Perithecia black, 0.5-0.6 mm across, hemispherically projecting, subglobose with a shortly conical ostiolar region. Involucrellum absent; exciple dimidiate, prosoplectenchymatous, black in upper part, medium brown in basal part, the innermost layer colourless; hamathecium of periphyses and periphysoids, interascal filaments absent, the periphysoids 20-40 μm long and up to 1 μm thick. Asci 8-spored, clavate, K/I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum. Ascospores at first 1-3-septate, then submuriform, finally densely muriform, hyaline, ellipsoid, 43.5-48.5 x 19-20 μm. Photobiont chlorococcoid, the cells very scarce and present only in places, globose, 5-6 wide. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.Note: a piooner species growing on granitic boulders of moraines in the glacier foreland of the high-alpine to subnival belt; only known from the type locality in the Eastern Alps (Carinthia, Austria). To be looked for in the Italian Alps.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Poorly known taxon in need of further study
Predictive model
Source: Riedl H. 1977. Eine neue Polyblastia-Art aus der Gletscherregion der Hohen Tauern, Kärnten, Österreich. Sydowia, 29: 245-251.
Polyblastia subglacialis H. RIBDL. a. Junge Asci mit Fragmenten
ascogener Hyphen; b. Hymenium und subhymeniales Geflecht; c. Periphysen;
d. Sporen vom zweizeiligen bis zum Reifestadium; b oberer, a, o, d unterer
Massstab: 1 Teilstrich jeweils = 10 \x
249
Source: Riedl H. 1977. Eine neue Polyblastia-Art aus der Gletscherregion der Hohen Tauern, Kärnten, Österreich. Sydowia, 29: 245-251.
Polyblastia subglacialis H. RIEDL, vegetativer Thallus: a. Splitter der
Gesteinsunterlage mit Blaualgen ( ?) und Pilzhyphen entlang von feinsten Haarrissen
; b. dickere Absorptionshyphen mit Zellen der Grünalge. 1 Teilstrich = 10 |x
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Poorly known taxon in need of further study
Predictive model
Source: Riedl H. 1977. Eine neue Polyblastia-Art aus der Gletscherregion der Hohen Tauern, Kärnten, Österreich. Sydowia, 29: 245-251.
Polyblastia subglacialis H. RIBDL. a. Junge Asci mit Fragmenten ascogener Hyphen; b. Hymenium und subhymeniales Geflecht; c. Periphysen; d. Sporen vom zweizeiligen bis zum Reifestadium; b oberer, a, o, d unterer Massstab: 1 Teilstrich jeweils = 10 \x 249
