Vahliella

Pérez-Vargas, Israel, Hernández-Padrón, Consuelo, Pérez De Paz, P. L., Van Den Boom, P. P. G. & Jørgensen, P. M., 2014, A new species in the lichen genus Vahliella from the Canary Islands, including a key to Vahliellaceae, Pannariaceae, and Coccocarpiaceae in Macaronesia, Phytotaxa 167 (2), pp. 183-188 : 185

Key to the known species of Vahliella and morphologically similar Pannariaceae and Coccocarpiaceae species in Macaronesia

(Except for the species described above, the characters used in this key are adapted from Carballal et al. 2007, 2010; Jørgensen 1978, 2000, 2005, 2008; Paz-Bermúdez et al. 2008).

1. Thallus foliose or subfoliose .............................................................................................................................................................2

- Thallus squamulose or granulose ....................................................................................................................................................11

2. Thallus distinctly foliose, hairy on the upper surface ( Erioderma )....................................................................................................3

- Thallus without hairs on the upper surface ........................................................................................................................................5

3. Thallus sorediate, brown tomentose below ................................................................................................... Erioderma mollissimum

- Thallus not sorediate, normally with apothecia..................................................................................................................................4 - Thallus Pd+ orange ( Pannaria )..........................................................................................................................................................9