Article · Wikipedia archive · Last revised Aug 3, 2026

Myriochapsa

Myriochapsa is a genus of corticolous (bark-dwelling), crustose lichens in the subfamily Graphidoidae of the family Graphidaceae. It has three species. The genus was circumscribed in 2013 by Marcela Cáceres, Robert Lücking, and H. Thorsten Lumbsch, with the Brazilian Myriochapsa psoromica assigned as the type species. The generic name combines Myriotrema and Chapsa, referring to the two Graphidaceae genera that it resembles. The main distinguishing characteristics of the new genus are its densely corticate thallus, and the presence of the lichen product psoromic acid. Additionally, its apothecia have wider pores, with differently textured margins. Although originally created as a monotypic genus, Harrie Sipman added two South American species in 2014.

Last revised
Aug 3, 2026
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Myriochapsa
Scientific classification Edit this classification
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Graphidales
Family: Graphidaceae
Genus: Myriochapsa
M.Cáceres, Lücking & Lumbsch (2013)
Type species
Myriochapsa psoromica
(M.Cáceres, L.S.de Jesus & T.S.Vieira) M.Cáceres, Lücking & Lumbsch (2013)
Species

M. annulata
M. chocoensis
M. psoromica

Myriochapsa is a genus of corticolous (bark-dwelling), crustose lichens in the subfamily Graphidoidae of the family Graphidaceae. It has three species.1 The genus was circumscribed in 2013 by Marcela Cáceres, Robert Lücking, and H. Thorsten Lumbsch, with the Brazilian Myriochapsa psoromica assigned as the type species. The generic name combines Myriotrema and Chapsa, referring to the two Graphidaceae genera that it resembles. The main distinguishing characteristics of the new genus are its densely corticate thallus, and the presence of the lichen product psoromic acid. Additionally, its apothecia have wider pores, with differently textured margins.2 Although originally created as a monotypic genus, Harrie Sipman added two South American species in 2014.3

Species

  • Myriochapsa annulata Sipman (2014) – Venezuela
  • Myriochapsa chocoensis Sipman (2014) – Colombia
  • Myriochapsa psoromica (M.Cáceres, L.S.de Jesus & T.S.Vieira) M.Cáceres, Lücking & Lumbsch (2013) – Brazil
References

References

  1. Wijayawardene, N.N.; Hyde, K.D.; Dai, D.Q.; Sánchez-García, M.; Goto, B.T.; Saxena, R.K.; et al. (2022). "Outline of Fungi and fungus-like taxa – 2021". Mycosphere. 13 (1): 53–453. doi:10.5943/mycosphere/13/1/2. hdl:10481/76378.
  2. Parnmen, Sittiporn; Cáceres, Marcela E.S.; Lücking, Robert; Lumbsch, H. Thorsten (2013). "Myriochapsa and Nitidochapsa, two new genera in Graphidaceae (Ascomycota: Ostropales) for chroodiscoid species in the Ocellularia clade". The Bryologist. 116 (2): 127–133. doi:10.1639/0007-2745-116.2.127. S2CID 85876576.
  3. Sipman, Harrie J.M. (2014). "New species of Graphidaceae from the Neotropics and Southeast Asia". Phytotaxa. 189 (1): 289–311. doi:10.11646/phytotaxa.189.1.21.