ITALIC 8.0

Diromma dirinellum (Nyl.) Ertz & Tehler

in Ertz & al., Fungal Divers., 70: 41, 2014. Basionym: Platygrapha dirinella Nyl. - Mém. Soc. Sc. Nat. Cherbourg, 4: 95, 1856.

Synonyms: Lecania diplotommoides Bagl.; Platygrapha diplotommoides (Bagl.) Jatta; Schismatomma diplotommoides (Bagl.) Samp.; Schismatomma diplotommoides var. crenulatum B. de Lesd.; Schismatomma dirinellum (Nyl.) Zahlbr.

Distribution: N - Lig (Watson 2014). C - Tosc (SI 2733), Umb (Herb. Ravera 2606), Laz (Nascimbene & al. 2021), Sar. S - Pugl.

Description: Thallus crustose, whitish grey, at first poorly evident, then rimose-areolate, corticate, forming small patches on the thalli of Dirina ceratoniae. Apothecia 0.1-0.4(-0.6) mm across, round, oblong or irregular in outline, immersed to semi-immersed, sometimes confluent, with a dark brown to brown-black, often white-pruinose disc, a poorly evident proper margin, and a corticate, finally sometimes excluded thalline margin level with disc. Proper exciple very thin, inconspicuous; epithecium pale brown to greenish brown; hymenium colourless, I+ reddish; paraphysoids coherent, simple or sparingly branched in upper part, slender, c. 1.5 µm thick, the apical cells up to 3 µm wide; hypothecium colourless to pale brown, I+ blue. Asci 8-spored, clavate, bitunicate, the apex thickened with a small internal K/I+ blue ring. Ascospores 3-septate, hyaline, fusiform to ellipsoid with rounded ends, slightly curved, (18-)20-31 x 4-5.5 µm, without a perispore. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus with roccellic acid.

Note: a rare species living as a parasite on Dirina ceratoniae, strictly confined to the Mediterranean belt. See also note on Ocellomma picconianum.

Growth form: Crustose

Substrata: bark

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

paras Dirina ceratoniae

Taxon bound to maritime-coastal situations

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: very rare

Dry mediterranean belt: extremely rare

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 38349

P.L. Nimis CC BY-SA 4.0

TSB 38349

P.L. Nimis CC BY-SA 4.0

TSB 16051