Phyllopsora buettneri ( Muell . Arg.) Zahlbr.

Kistenich, Sonja, Bendiksby, Mika, Vairappan, Charles S., Weerakoon, Gothamie, Wijesundara, Siril, Wolseley, Patricia A. & Timdal, Einar, 2019, A regional study of the genus Phyllopsora (Ramalinaceae) in Asia and Melanesia, MycoKeys 53, pp. 23-72 : 23

Phyllopsora buettneri ( Muell. Arg.) Zahlbr.

Description.

Swinscow and Krog (1981), Timdal and Krog (2001), Timdal (2008b, as P. buettneri chemotypes 1 and 2), Elix (2009).

Distribution.

Pantropical ( Brako 1991, as P. buettneri var. buettneri ; Timdal and Krog 2001; Elix 2009).

Remarks.

We recognize five chemotypes of this species, three occurring in Asia and Melanesia (Fig. 2C). Chemotype 1 (pannarin and zeorin) was found in material from Japan, Sri Lanka, and Thailand; chemotype 3 (dechloropannarin, zeorin) in material from China, Japan, Sri Lanka, and Thailand; and chemotype 5 (pannarin and an unknown compound, no zeorin) in material from Papua New Guinea and Sri Lanka (Suppl. material 2: Table S1). The specimen of chemotype 1 from Japan, and one of the two from Sri Lanka, differed from typical specimens of the chemotype in lacking zeorin. Chemotype 5 is described here for the first time, and contains an unknown compound with Rf values similar to argopsin in solvent system B’ but with a distinct blue UV366 fluorescence (not quenching) on the chromatograms after development. Chemotype 2 (pannarin, phyllopsorin, zeorin) is Neotropical and chemotype 4 (argopsin, norargopsin, zeorin) is known from the Norfolk Islands. We were unable to sequence specimens of chemotype 4 and 5, but specimens of chemotype 1-3 are resolved in a clade with chemotype 1 and 2 of P. porphyromelaena (Fig. 1, Suppl. material 1: Fig. S1). The species is new to China, Japan, and Sri Lanka.