ITALIC 7.0

Pilophorus cereolus (Ach.) Th. Fr.

Lichenogr. Scand., 1: 55, 1871. Basionym: Lichen cereolus Ach. - Lichenogr. Suec. Prodr.: 89, 1799.

Synonyms: Stereocaulon cereolinum Ach. non auct. ital.; Stereocaulon cereolum (Ach.) Ach.

Distribution: N - TAA (Nascimbene & al. 2022), Piem.

Description: Primary thallus crustose, persistent, of sorediate, 0.1-0.2 mm broad, grey-green to grey-brown granules, with scattered, brown to almost black, 1-2 mm wide cephalodia. Pseudopodetia simple, solid, to 6 mm tall, c. 1 mm thick in the middle, farinose-sorediate throughout, irregularly curved. Apothecia rare, solitary at tips of pseudopodetia, black, spherical, to 1.5 mm broad. Hymenium dark purple, c. 80 μm high. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1-celled, hyaline, spindle-shaped, 14-21 x 5-6.5 μm. Pycnidia bottle-shaped, black, on the tips of pseudopodetia. Conidia sickle-shaped, hyaline. Photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC-, P-. Chemistry: atranorin and zeorin.

Note: an arctic-alpine, probably incompletely circumpolar lichen found on siliceous rocks in moist-wet situations near treeline; restricted to the Alps in Italy, and perhaps more widespread, but certainly not common.

Growth form: Fruticose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

Index Fungorum GBIF

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

Triin Aimla; Owner: University of Tartu

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.