Myelochroa metarevoluta (Asahina) Elix & Hale,

Moon, Kwang Hee, Ahn, Chorong & Kashiwadani, Hiroyuki, 2015, Revision of the lichen genus Myelochroa (Ascomycotina: Parmeliaceae) in Korea, Journal of Species Research 4 (1), pp. 23-32 : 29-30

Myelochroa metarevoluta (Asahina) Elix & Hale,

Mycotaxon 29: 241, 1987.

Basinonym: Parmelia metarevoluta Asahina, J. Jpn. Bot. 35: 97, 1960. Type collection. Japan. Honshu. Prov. Shinano: Azusayama, Minamisaku-gun. On rocks; elevation about 1400 m, August 8, 1959, M. Nuno & S. Kurokawa 59243 (lectotype in TNS! and isolectotype in US).

Parmelina metarevoluta (Asahina) Hale, Phytologia 32: 483, 1974.

Chemistry. Atranorin, galbinic acid, zeorin, leucotylin and its derivatives, and secalonic acid A.

This species is considered the sorediate morph of M. galbina and is known from eastern Asia and eastern North America ( Hale, 1976). It is very easily distinguished from the other sorediate species by the P+ deep yellow color reaction in the medulla from production of galbinic acid.

All the five specimens of this species in NIBR produce leucotylin only and never produce leucotylic acid, as in the case for Japanese materials ( Kurokawa and Arakawa, 1997).

Myelochroa metarevoluta has been reported from China, Japan and the eastern United States ( Hale, 1976). According to Jayalal et al. (2012), it was recently reported from India and Nepal. In Korea, it has been collected once on Mt. Sorak by Moon (1999) and is apparently a very rare species. This report is second record for this species in Korea.

Specimens examined. Prov. Gangwon (=Prov. Kangwon), Inje-gun, Buk-myeon, Yongdae-ri, Mt. Sorak, around Paektam temple, on bark of Quercus sp. , elevation about 460-550 m, October 6, 1995, K.H. Moon 396 & H. Kashiwadani (TNS, NIBR); Inje-gun, Buk-myeon, Yongdae-ri, Mt. Sorak, along the Backdam valley, on bark of Quercus sp. , elevation about 480 m, July 10, 2005, K.H. Moon 8512 (NIBR); elevation about 460-550 m, October 6, 1995, K.H. Moon 396 & H. Kashiwadani; Inje-gun, Buk-myeon, Yongdae-ri, Mt. Sorak, along the Backdam valley, on Acer sp. , elevation about 470 m, April 17, 2008, K.H. Moon 10227 (NIBR). Incheon, Ongjin-gun, Bukdo-myeon, Jangbong-ri, on rocks, elevation about 10 m, April 20, 2013, K.H. Moon 13205 (NIBR). Prov. Gyeongsangbuk, Gyeongju city, Jinhyeon-dong, Mt. Toham, around Seokguram Grotto, on bark of Zelkova serrata , October 15, 2013, K.H. Moon 13834 (NIBR).