ITALIC 8.0

Verrucaria glaucovirens Grummann

Cat. Lich. Germ.: 16, 1963

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, rimose-areolate, 0.4-0.8(-1.5) mm thick, with a thick and abrupt margin, the areoles dull brown, slightly constricted at base, subangular in outline, flat, 0.5-1.5 mm wide, secondarily subdivided into smaller units which may overlap each other in 2-3 layers, with pale flanks, separated by broad fissures. Cortex poorly developed, paraplectenchymatous throughout, pale brown in upper part, overlain with a thin epinecral layer; medulla without a black basal layer. Perithecia several per areole, immersed, arising in deep parts of thallus and occupying different levels, the apices brown to black-brown, hardly projecting. Involucrellum absent; exciple subglobose or ellipsoid, 0.15-0.25 mm wide, the wall colourless to brown, apically black, 15-20 µm thick; hamathecium of mostly simple, c. 20 µm long periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type. Ascospores 1-celled, hyaline ellipsoid, (15-)17-19(-20) x (7-)8-10 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a mainly calcicolous species, known from different localities in Central Europe, with scattered records also from the Alps (outside Italian territory), and also reported from Algeria and North America. To be looked for in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

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

Gerhard Neuwirth. Source: CNALH. 2021. http//:lichenportal.org/cnalh/index.php. Accessed on December 30.

Othmar Breuss. Source: CNALH. 2021. http//:lichenportal.org/cnalh/index.php. Accessed on December 30.