Herpothallon Tobler 1937
Creators: name: Chen, Pengfei
name: Liu, Linlin
name: Xie, Congmiao
name: Zhang, Lulu
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Arthoniomycetes
Arthoniales
Arthoniaceae
Herpothallon

description: Key to the species of Herpothallon known from China
1 Pigments in thallus visible from above, prothallus with red pigment, K+ purple; pseudisidia cylindrical or globose........................ ................................................................................................. H. rubrocinctum (Ehrenb.) Aptroot, Lücking & G. Thor (2009: 61)
- No pigments in thallus, pseudisidia and prothallus visible from above (rarely yellow pigments located in hidden hypothallus) ...... ............................................................................................................................................................................................................2
2 Thallus with globose to granular pseudisidia .....................................................................................................................................3
- Thallus with cylindrical pseudisidia...................................................................................................................................................6
3 Thallus K– and perlatolic acid present .......................................................... H. granulare (Sipman) Aptroot & Lücking (2009: 43)
- Thallus K–/K+ yellow to red and perlatolic acid absent ....................................................................................................................4
4 Psoromic acid chemosyndrome.................................................................................. H. weii Y.L. Cheng & H.Y. Wang (2012: 440)
- Different substances ...........................................................................................................................................................................5
5 Gyrophoric present (C+ bright red, K–).................................................................................................................... H. subglobosum
- Norstictic acid present (C– and K+ orange) ............................................................................................................... H. capilliferum
6 Gyrophoric present (C+ bright red)....................................................................................................................................................7
- Gyrophoric absent (C–) ......................................................................................................................................................................8
7 Thallus K+ yellow, pseudisidia smaller (up to 0.2 × 0.1 mm) .............................................................................. H. viridi-isidiatum
- Thallus K–, pseudisidia larger (up to 1.0 × 0.1 mm).................................................................................................. H. philippinum
8 Psoromic acid (P+ golden yellow) present.................................................................................................................... H. echinatum
- Stictic acid present (P+ orange)................................................................................................................................ H. polyisidiatum
description: Published as part of Chen, Pengfei, Liu, Linlin, Xie, Congmiao & Zhang, Lulu, 2022, Four new species of Herpothallon (Arthoniaceae, Arthoniales, Arthoniomycetes, Ascomycota) from China, pp. 83-91 in Phytotaxa 536 (1) on page 90, DOI: 10.11646/phytotaxa.536.1.5, http://zenodo.org/record/6224563