ITALIC 8.0

Gilbertaria squalescens (Nyl.) M. Svensson & Fryday

Mycological Progress: 16 , 2022. Basionym: Lecidea squalescens Nyl. - Öfvers. K. Svensk. Vetensk.-Akad. Förh., 17: 297, 1860.

Synonyms: Bacidia sphaeralis (Körb.) Erichsen; Biatorina sphaeralis (Körb.) Jatta; Buellia sphaeralis (Körb.) Anzi; Catillaria kivakkensis Vain.; Catillaria sphaeralis Körb.; Lecidea subramosa J. Lowe; Thalloidima rimulosum Th. Fr.; Thalloidima squalescens (Nyl.) Stein in Cohn; Toninia squalescens (Nyl.) Th. Fr.

Distribution: N - Lomb.

Description: Thallus crustose-subsquamulose, olivaceous grey, ash-grey or grey-brown, usually epruinose, consisting of irregular, 0.3-0.5(-0.8) mm wide, convex, bullate to substipitate squamules with entire to crenate margins, coalescing into 1-2(-3) cm wide patches. Upper cortex up to 20 μm thick, lacking crystals; medulla white, sometimes becoming hollow in larger squamules, lacking crystals. Apothecia biatorine, 0.3-0.8(-1.5) mm across, glossy black, sessile and more or less constricted at base, rounded, sometimes confluent, with a strongly convex, epruinose, disc, without an evident proper margin. Proper exciple not apparent; epithecium patchily blue-green, 8-13 μm high, K+ brighter green, N+ magenta; hymenium colourless, but often with pigmented vertical streaks originating from the epithecium, (40-)50-70(-75) μm high, hemiamyloid, I+ blue turning reddish; paraphyses 2-3(-4) μm thick, slightly branched in upper part, strongly conglutinated, the apical cells not swollen; hypothecium up to 350 μm high, densely opaque, the upper 50-75 μm dilute brown (K–, N+ dilute golden-brown) with darker spots, the lower part more or less colourless, K/I+ blue. Asci 8-spored, cylindrical-clavate, with a K/I+ blue apical dome penetrated by a narrow, K/I- apical cushion surrounded by a narrow, deeply K/I+ blue zone, the wall K/I- but surrounded by an I+ red-brown and K/I+ blue outer layer, the ocular chamber small, Biatora-type. Ascospores (0-)1(-3)-septate, hyaline, ellipsoid-dacryoid with a slightly pointed end, (5-)6-11(-12) x (2.5-)3.5-5(-5) μm. Photobiont chlorococcoid, the cells 6–12 μm wide. Spot tests: thallus K-, C-, KC-, P-, UV- or UV+ faintly grey or white. Chemistry: unknown, perhaps without lichen substances.

Note: on silicicolous mosses, mostly on Andreaea near or above treeline. For further details see Svensson & Fryday (2022).

Growth form: Crustose

Substrata: rocks, soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

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5

(info)

Solar irradiation:

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4

5

(info)

Aridity:

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5

(info)

Eutrophication:

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5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

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6

(info)

Predictive model

Index Fungorum GBIF

Einar Timdal, Natural History Museum, University of Oslo, Norway - CC BY-SA NC

TSB 25211

Einar Timdal, Natural History Museum, University of Oslo, Norway - CC BY-SA NC

TSB 25211