Arthonia insitiva (Körb.) Clauzade, Diederich & Cl. Roux

Bull. Soc. linn. Provence, num. spéc. 1: 29, 1989 comb. inval.. Basionym: Celidium insitivum Körb. - Syst. Lich. Germ: 217, 1855.
Synonyms: Celidiopsis insitiva (Körb.) A. Massal.
Distribution: N - TAA (Clauzade & al. 1989, Brackel 2016), Piem (Baglietto & Carestia 1880, Brackel 2016)
Description: Thallus inapparent, not lichenized, the hyphae developing within the thalli of species of the Lecanora subfusca-group. Apothecia arthonioid, immarginate but often surrounded by a collar deriving from the thallus of the host lichen, brown-black, rounded, with a rough surface. Proper exciple very poorly developed; epithecium brown, K-; hymenium colourless; paraphysoids distinctly swollen at apex; hypothecium brown. Asci 8-spored, broadly clavate to ovoid, semi-fissitunicate, with a large apical dome and a distinct ocular chamber, Arthonia-type. Ascospores 3-septate, at first hyaline but soon turning brown, ellipsoid, 10-12 x 6-8 μm. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.
Note: a lichenicolous fungus growing on species of the Lecanora subfusca-group, whose distribution in Italy is still very poorly known; all records (worldwide) are from the 19th century. .
Growth form: Lichenicolous fungus
Substrata: bark
Reproductive strategy: mainly sexual
paras Lecanora subfusca s.lat.

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: extremely rare
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: very rare
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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