ITALIC 8.0

Involucropyrenium tremniacense (A. Massal.) Breuss

Ann. naturhist. Mus. Wien, 98B: 40, 1996. Basionym: Catapyrenium tremniacense A. Massal. - Lotos, 6: 79, 1856.

Synonyms: Dermatocarpon tremniacense (A. Massal.) J. Steiner; Involucrocarpon tremniacense (A. Massal.) Servít; Verrucaria tremniacensis (A. Massal.) Nyl.

Distribution: N - Ven (Lazzarin 2000b), Piem, VA (Piervittori & Isocrono 1999).

Description: Thallus squamulose to subcrustose, beige to pale brown, dull, epruinose, thin, closely adpressed to the substratum. Squamules 0.3-1.5(-2) mm broad, 0.1-0.2 mm thick, rounded to crenate, flattened to slightly convex, smooth, contiguous, developing on a pale hypothallus; lower surface pale, attached by c. 4 µm thick, pale rhizohyphae. Upper cortex paraplectenchymatous, 10-25 µm thick, of small isodiametrical cells, rather thin, poorly differentiated from the algal layer, overlain by a 20-50 µm thick epinecral layer; medulla and lower cortex not differentiated. Perithecia developing from the hypothallus among the squamules, globose, projecting, with an apical involucrellum reaching up to the half of the perithecium, up to 0.35 mm across. Exciple dark throughout, of tangentially arranged, elongated cells; hamathecium of periphyses, interascal filaments absent. Asci 8-spored, clavate, with biseriately arranged spores, the wall I-. Ascospores 1-celled, hyaline, ellipsoid, thin-walled, 13-17(-18) x 6-7(-8) µm. Pycnidia unknown. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a widespread terricolous species of open grasslands on more or less calcareous substrata, probably more common throughout the country.

Growth form: Squamulose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: rare

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

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

Index Fungorum GBIF

Source: Bell Museum of Natural History, University of Minnesota - Lichens (MIN:Lichens) Catalog #: 844374 Collector: Arnold; Date: 1866-00-00 Locality: Germany, Brandenburg, Arnold - Lichenes Exsiccati'