Anamorph: not known.
Teleomorph: basidiomata 0.4 - 3 mm diam, pulvinate to discoid, becoming tuberculate when old, the base constricted, firmly gelatinous, yellowish to reddish brown, pinkish when fresh. Context hyphae 1-2 µm diam, thin-walled, without clamp connections, haustorial branches with mother cell 2-4 x 1-2 µm in size, ellipsoidal. Hymenium hyaline, containing numerous probasidia. Probasidial initials clavate to obpyriform, proliferating through the basal clamp. Hyphidia and cystidia absent. Basidia 23-34 x 8-14 µm, obpyriform, constricted at the two transverse septa, the upper cell with one longitudinal septum, the lower cell 10-15(-18) x 5-7 µm, elongate with an attenuated stalk-like base. Epibasidia 25-35 x 2-4 µm. Basidiospores 5-6.5 x 4-6 µm, subglobose, with a large apiculus.
Not assessed; would almost certainly be considered as Data Deficient due to the restricted number of surveys for such fungi. It appears to be reasonably common in VC95 Moray, but apparently has a rather restricted distribution.
Tremella tuckerae also occurs on Ramalina species in GB&I, but has basidia with a single longitudinal or oblique septum, and no transverse septa.
In GB&I, reported as a parasite of Ramalina fraxinea; recorded elswhere also on R. lacera.
In GB&I, currently reported from various locations on bark of Crataegus and on a dead Ulmus tree in VC95 Moray; also two sites in VC106 E Ross and one in VC107 E Sutherland (Scotland). Known elsewhere in Europe from Estonia, France, Poland and Sweden.