Mobergia calculiformis

Occurrence of Mobergia calculiformis (Physciaceae, Lecanorales)
in the Northern Vizcaíno Desert of Baja California, Mexico.

Spjut, R.W., 1995.
Pages 475-482 in Flechten Follmann.
Contributions to Lichenology in Honor of Gerhard Follmann.
Editors Fred J.A. Daniels, Margot Schulz & Jörg Peine.
Geobotanical and Phytotaxonomical Study Group
Botanical Institute, University of Cologne
Cologne, Germany

Dominant lichen on dark volcanic rocks above Punta Escarpada N of Puerta Catarina, Spjut 13041, Apr 1994	Close-up of thalli on rock above Punta Escarpada N of Puerta Catarina, Spjut 13041, Apr 1994. Occurring with Vermilacinia procera.
Additional location: Bahía Blanca, Pacific Coast between Guererro Negro and El Rosario; south of Punta Canoas. Rocks along the beach. Spjut & Marin 11466, 15 Apr 1990. 29º05'N, 114º47'W	Additional location: Punta Cono. Low rocky peninsula extending out from bay. Spjut & Marin 11532A, 15 Apr 1990. 28º57'N, 114º35'W, elev. 2 m.
Additional location: Vizcaino Peninsula: Vizcaino Rd, NE of Bahía Tortugas, Campito Lighthouse, north shore. On rocks of ridge. 27º48'22'N, 114º45'15''W, elev. 30 m. Spjut & Marin 13669, 28 Mar 1996.	.
Reported by Spjut (1995 to occur on the main peninsula of Baja California from a ridge east above Punta Rocosa (between Punta Santa Rosalillita and El Marrón), north to Campo Nuevo, near Punta San Fernando. The 1996 report cited above is a first report for occurrence on the Vizcaíno Peninsula. A chemical analysis of a 35 g sample from this location yielded 2.94% norstictic acid and 0.25% atranorin (Huneck & Schmidt 1995, lo cit.). A sample from the Punta Escarpada location shown above contains stictic acid, 1% dry weight, E. M. Addo et al. (Aug 2022), LC-MS and NMR, notably 1D selective methods with 1D-TOCSY and 1D-NOESY (unpublished).