Diplotomma lutosum A. Massal.

Miscell. Lichenol.: 41, 1856.
Synonyms: Buellia lutosa (A. Massal.) Anzi; Buellia subdispersa Mig.; Diplotomma subdispersa (Mig.) Etayo & Breuss
Distribution: N - Frl (TSB 15363), Ven (Nascimbene & al. 2021), TAA (Nascimbene & al. 2021), Lomb, Piem (TSB 25801). C - Tosc. S- Bas (Nascimbene & al. 2021).
Description: Thallus crustose, episubstratic, brownish to yellowish grey, areolate. Medulla white, amyloid I+ blue. Apothecia lecideine, black, 0.3-0.6 mm across, subsessile, with a soon convex, heavily white-pruinose disc, and a soon excluded proper margin. Epithecium brown; hymenium colourless; paraphyses simple, slightly capitate. Asci 8-spored, clavate, with a thick apex, amyloid, with a distinct axial mass, Bacidia-type. Ascospores 3-septate, brown, ellipsoid, 10-15 x 3-5 μm. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: an apparently widespread but rare, or at least rarely distinguished, mostly silicicolous species, characterised by four-celled spores with transversal septa only, and by the J+blue reaction of the medulla.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: extremely rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent


pH of the substrata:

(info)

1

2

3

4

5

Solar irradiation:

(info)

1

2

3

4

5

Aridity:

(info)

1

2

3

4

5

Eutrophication:

(info)

1

2

3

4

5

Poleotolerance:

(info)

0

1

2

3

Altitudinal distribution:

(info)

1

2

3

4

5





Pier Luigi Nimis - CC BY-SA 4.0
TSB 42405



Pier Luigi Nimis - CC BY-SA 4.0
TSB 42405



Juri Nascimbene - CC BY-SA 4.0
Italy, E Alps
Herb. Nascimbene



Juri Nascimbene - CC BY-SA 4.0
Italy, E Alps
Herb. Nascimbene



Juri Nascimbene - CC BY-SA 4.0
Italy, E Alps
Herb. Nascimbene



P.L. Nimis CC BY-SA 4.0
TSB 42405



P.L. Nimis CC BY-SA 4.0
TSB 8271



P.L. Nimis CC BY-SA 4.0
TSB 41223



P.L. Nimis CC BY-SA 4.0
TSB 41223



P.L. Nimis CC BY-SA 4.0
TSB 41223



P.L. Nimis CC BY-SA 4.0
TSB 41223



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37976



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37976



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37976



P.L. Nimis CC BY-SA 4.0
TSB 37872



P.L. Nimis CC BY-SA 4.0
TSB 37873