Verrucariopsis halophila (Nyl. ex Branth & Rostr.) Gueidan, Monnat & Cl. Roux

Bull. Soc. linn. Provence, 73: 73, 2022.. Basionym: Verrucaria halophila Nyl. ex Branth & Rostr. - Bot. Tidsskr., 3: 275, 1869,
Synonyms: Verrucaria frisiaca Erichsen; Verrucaria halizoa auct. Eur. non Leight.; Verrucaria mackenzie-lambii Erichsen; Verrucaria microspora auct. non Nyl.
Distribution:
Description: Thallus crustose, thinly episubstratic, 40-80 µm thick, usually continuous, pale olive-green to brown in exposed situations, subgelatinous and translucent when wet, without ridges or punctae, sometimes delimited by a dark prothallus, in section palisade-plectenchymatous, the algal cells arranged in vertical columns. Perithecia black, 0.15-0.3 mm across, forming regular, conical-hemispherical projections with rounded apices. Involucrellum dimidiate, appressed to exciple or slightly spreading in lower part; exciple pale at base, the wall I-; hamathécium of short 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, narrowly ellipsoid, (7-)8-11(-12) x 3.5-4.5(-5.5) µm, (1.3-)1.7-2.8(-3.5) times as long as wide. Pycnidia rare, black, c. 40 µm across, finally plurilocular, the conidiogenous cells lageniform, inserted directly on the pycnidial wall. Conidia short-bacilliform, straight to slightly curved, 2.9–3.5 x c. 1 µm. Photobiont chlorococcoid ( Pseudendoclonium). Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a maritime species growing on a wide variety of rocks (exceptionally also on bark along the Atlantic coasts) in rather shaded situations, with optimum in the upper mediolittoral belt. It is widespread along the Atlantic coasts, but is also known from Corsica (Roux & Coll. 2025). To be looked for in Italy, especially along the coasts of Sardinia.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Taxon bound to maritime-coastal situations

pH of the substrata:

12345

(info)

Solar irradiation:

12345

(info)

Aridity:

12345

(info)

Eutrophication:

12345

(info)

Poleotolerance:

0123

(info)

Altitudinal distribution:

123456

(info)


Predictive model

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Camaret


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Camaret
with Wahlenbergiella striatula


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Camaret
with Wahlenbergiella striatula


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec
with Wahlenbergiella striatula


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Cap de la Chèvre


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Morgat Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Rulianec


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Pointe de Toulinguet


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Cap de la Chèvre


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Camaret


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Camaret


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=21&lang=en
France, Camaret