Xanthoparmelia delisei, (Duby) O. Blanco, A. Crespo, Elix, D. Hawksw. & Lumbsch. (2004 b: 967)

Elvebakk, A., Bjerke, J. W. & Støvern, L. E., 2014, Parmelioid lichens (Parmeliaceae) in southernmost South America, Phytotaxa 173 (1), pp. 1-30 : 14

X. delisei (Duby) O. Blanco, A. Crespo, Elix, D. Hawksw. & Lumbsch. (2004b: 967)

The species was reported from one locality in Santa Cruz and one locality in Chilean Tierra del Fuego (Yendegaia very close to the Argentinian border) by Esslinger (1977). He stated that South American and Australian samples were somewhat different morphologically from Northern Hemisphere material, however, no definitive characters could be defined separating them .

According to our experience, X. delisei is locally very common in the steppe areas and drier parts of the forested areas of the National Park Torres del Paine in Magallanes. A total of 20 collections are cited here from this area, in addition to a single collection from another part of the region. The species varies from having long, diverging and very discrete lobes, to being more compact, and then with narrower lobes and smaller apothecia than X. imitatrix , which it most often can be confused with. However, their chemistry is distinct and all our studied specimens of X. delisei contain perlatolic, glomelliferic, and glomellic acids as well as a forth unidentified substance. This is the only species from our study area with this distinct chemosyndrome, whereas the other four species with this chemosyndrome treated by Esslinger (1977) are isidiate.

Specimens examined: CHILE. XII REGIÓN DE MAGALLANES: Parque Nacional Torres del Paine, 500 m N of the western lake of Lagunas Mellizas , 51 ° 03’30”S, 72 ° 59’W, 150 m, on a non-forested exposed hill, 3 Dec 2000, Elvebakk, A. 00:906 ( TROM) ; Lagunas Mellizas E, 51 ° 04’30”S, 72 ° 58’W, 100 m, on rocks, 1 Dec 2000, Elvebakk, A. 00:872 ( TROM) ; Pudeto, 400 m E of the easternmost lake of Lagunas Mellizas , 51 ° 03’30”S, 72 ° 58’W, 80 m, on strongly exposed outcrop 50 m N of the road, locally common, 3 Dec 1999, Elvebakk, A. 99:1029 ( TROM) ; 99:1030 ( TROM); 99:1031 ( TROM); 14:004 ( MAF, TROM); 200 m S of Salto Grande , W of the Pudeto inlet, 51 ° 03’30”S, 73 ° 01’W, 70 m, 5 Dec 2000, Elvebakk, A. 00:924 ( TROM) ; 00:932 ( TROM); 500 m W of Laguna Los Flamencos , 51 ° 01’30”S, 72 ° 50’W, 250−300 m, on pebbles on an exposed, dry ridge, 2 Dec 1999, Elvebakk, A. 99:999 ( SGO) ; 99:1000 ( TROM); 200 m S of Salto Grande , W of the Pudeto inlet, 51 ° 03’30”S, 73 ° 01’W, 70 m, 5 Dec 2000, Elvebakk, A. 00:930 ( TROM) ; Lago Nordenskjöld S , 1 km W of Mirador Lago Nordenskjöld , 51 ° 03’S, 72 ° 56’W, 250 m, on exposed rocks, 1 Dec 2000, Elvebakk, A. 00:855 ( TROM) ; Lago Pehoe NW , 3−500 m SE of Refugio & Camping Pehoe , 51 ° 04’30”S, 73 ° 07’W, 70 m, on rocks on an exposed ridge near the lake, 11 Dec 1999, Elvebakk, A. 99:1247 ( TROM) ; 99:1248 ( TROM); 2 km N of E end of Lago Sarmiento Chico, 51 ° 03’S, 72 ° 56’W, 250 m, on rocks, 2 Jan 1998, Elvebakk, A. 98:018 ( TROM) ; 2.5 km E of Laguna Blanquillos , 51 ° 00’34,9”S, 72 ° 51’35,8”W, 110 m, on rocks, 2 Dec 1999, Elvebakk, A. 99:994 ( TROM) ; 99:995 ( TROM); 99:998A ( TROM); 99:998B ( TROM); 0.5 km E of Refugio & Camping Pehoe , 500 m NE of the river and 500 m SE of Lago Skottsberg , 51 ° 04’S, 73 ° 07’W, 110 m, on an erratic granitic boulder, 11 Dec 1999, Elvebakk, A. 99:1252 ( TROM) ; Seno Skyring, Estancia Río Verde , 3 km W of Maria Felicinda , 52 ° 26’S, 71 ° 22’W, 2 m, on the E sides of supralittoral rocks, 30 Nov 1999, Elvebakk, A. 99:943 ( TROM) .