Candelariella vitellina
Candelariella vitellina is a common and widespread green-yellow to orange-yellow crustose areolate lichen that grows on rock, wood, and bark, all over the world. It grows on non-calcareous rock, wood, and bark.
Taxonomy
The taxon Candelariella vitellina var. mendozae, proposed by Finnish lichenologist Veli Räsänen in 1941, was promoted to distinct species status, Placomaronea mendozae, in 2004.Description
Candelariella vitellina often has tiny lobate in the shape of lion claws. The areoles may be flat or convex. Its sexual reproductive structures are a 0.35–1.0 mm-wide, darker yellow than the thallus, rimmed with thallus-like tissue, flat but becoming convex with age. The results of lichen spot tests are K+ reddish, KC−, and C−. It produces calycin, pulvinic acid, pulvinic dilactone and vulpinic acid as secondary metabolites.Candelariella vitellina looks like a miniature version of C. rosulans. It can be distinguished by C. vitanela having a visible exciple, which C. rosulans does not have. It is usually much larger and thicker than the similar C. lutella.