Caloplaca

Pérez-Vargas, Israel, González-Montelongo, Cristina, Padrón, Consuelo Hernández & Paz, Pedro Luis Pérez De, 2015, A new species in the lichen genus Caloplaca from the Canary Islands, including a key to all brown-black Caloplaca sensu lato species in Macaronesia, Phytotaxa 205 (3), pp. 205-210 : 208

Key to all brown-black Caloplaca s.l. in Macaronesia

1. On bark, or wood................................................................................................................................................................................2 On rock...............................................................................................................................................................................................5

2. Soredia absent.....................................................................................................................................................................................3 Soredia present...................................................................................................................................................................................4

3. Epihymenium greenish-bluish, K–, N+ reddish............................................................................................... Caloplaca nigrocarpa Epihymenium blackish, K+ purple, N+ yellowish brown............................................................................. Caloplaca catillarioides

4. Soralia deeply excavate. Epihymenium K- ..................................................................... Caloplaca obscurella (= C. sarcopisioides ) Soralia raised above thallus. Epihymenium K+ deep blue........................................................................ Caloplaca caesiosorediata