Synarthonia ochracea (Dufour) Van den Broeck & Ertz

in Van den Broeck & al., Pl. Ecol. Evol., 151, 3: 343, 2018.. Basionym: Arthonia ochracea Dufour - J. Phys. Chim. Hist. nat. Arts, 87: 205, 1818.
Synonyms: Arthonia cinnabarina var. ochracea (Dufour) Nyl.; Conangium ochraceum (Dufour) Fr.; Coniocarpon ochraceum (Dufour) Fr.; Opegrapha ochracea (Dufour) Hepp
Description: Thallus at first inapparent and non-lichenized, developing on the thalli of Graphis scripta, later becoming lichenized and autonomous, up to 18 μm thick, whitish to pale brown, smooth to cracked, without a distinct prothallus. Apothecia lirelliform, often stellate to lobed, at first immersed, then semi-sessile, solitary (and then 0.1-0.5 x c. 0.1 mm), or in clusters of 2-4, 0.6-0.8 x 0.3-0.5 mm, with a blackish, but heavily ochraceous orange (cinnamon) pruinose, flat disc, without a distinct proper margin. Proper exciple 10-25 μm wide laterally, brownish; epithecium orange-brown, 20-25 μm high; hymenium brownish to reddish 40-60 μm high, I+ deep blue, K/I+ deep blue with purplish patches; paraphysoids 1.5-2.2 μm thick, the apical cells colourless, hardly swollen, immersed in gel; hypothecium orange-brown, c. 30 μm. All apothecial parts (in section) more or less inspersed with clusters of granular, orange-brown crystals reacting K+ purplish to reddish. Asci ellipsoid to obovoid, semi-fissitunicate, with a K/I+ blue ring-structure in tholus and an ocular chamber visible in young asci. Ascospores (2-)3(-4)-septate, slightly constricted at septa and with an enlarged apical cell, hyaline but turning brown and ornamented when overmature, oblong-ovoid, 11.5-17 x 4-7.5 μm, with a c. 0.7 μm thick gelatinous perispore. Pycnidia immersed to erumpent, pale, the wall composed of brown-walled hyphae. Conidia simple, hyaline, bacilliform, 4.2-5.3 x 0.8-1.3 μm. Photobiont probably absent in young lichenicolous thalli, then trentepohlioid. Spot tests: thallus K+ yellowish, C-, KC-, PD-, UV+ pale orange; apothecia K+ purplish, UV+ dark orange. Chemistry: apothecia with crystals of anthraquinones, mainly parietin.
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
paras Graphis scripta when young

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Montane belt: extremely rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: extremely rare
Padanian area: absent

pH of the substrata:

12345
info

Solar irradiation:

12345
info

Aridity:

12345
info

Eutrophication:

12345
info

Poleotolerance:

0123
info

Altitudinal distribution:

123456
info

Rarity

absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map

Martin Grube
with neighbouring Coniocarpon fallax


Source: http://dryades.units.it/lichenothecaveneta/images/species/0134_3.JPG
Trevisan, Lichenotheca Veneta 134


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in op. Magrè Pr. Vicet. 1855
as Coniocarpon ochraceum


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in nem. Montello Rarissimo
as Coniocarpon ochraceum