habitat_substrate_xanthoparmelia
xanthoparmelia
one of the most frequent species in the Namib Desert, occurring on quartzite pebbles, often with C. namibensis, Xanthoparmelia dregeana (Nyl.) O. Blanco et al., X. tentaculina (Essl.) O. Blanco et al. and X. walteri D. Knox
Stellarangia testudinea
Caloplaca testudinea