# Acanthothecis

Acanthothecis is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed by Frederick Edward Clements in 1909.

## Species

As of April 2023, Species Fungorum (in the Catalogue of Life) accepts 56 species of Acanthothecis.
* Acanthothecis abaphoides (Nyl.) Staiger & Kalb (1999)
* Acanthothecis adjuncta Welz & Sipman (2014)
* Acanthothecis africana Staiger & Kalb (2002)
* Acanthothecis aggregata Aptroot, Lücking & M.Cáceres (2023) – Brazil
* Acanthothecis alba Herrera-Camp., Barcenas-Peña & Lücking (2019) – Mexico
* Acanthothecis aquilonia A.W.Archer & Elix (2008) – Australia
* Acanthothecis archeri B.O.Sharma, Makhija & Khadilkar (2010) – India
* Acanthothecis asprocarpa (A.W.Archer) A.W.Archer (2007)
* Acanthothecis aurantiaca (Müll. Arg.) Staiger & Kalb (2002)
* Acanthothecis aurantiacodiscus Weerakoon, Lücking & Lumbsch (2014)
* Acanthothecis bicellularis (Sipman & Lücking) Lücking (2022) – Brazil
* Acanthothecis bicellulata Staiger & Kalb (2022) – Brazil
* Acanthothecis borealis A.W.Archer & Elix (2007) – Australia
* Acanthothecis celata B.O.Sharma, Makhija & Khadilkar (2010) – India
* Acanthothecis coccinea B.O.Sharma, Makhija & Khadilkar (2010) – India
* Acanthothecis collateralis Makhija & Adaw. (2007) – India
* Acanthothecis dialeuca (Kremp.) Staiger & Kalb (2002)
* Acanthothecis dialeucoides Kalb & Staiger (2009) – Thailand
* Acanthothecis farinosa Staiger & Kalb (2022) – Brazil
* Acanthothecis floridana Lendemer & R.C.Harris (2014) – United States
* Acanthothecis floridensis Seavey & J.Seavey (2017) – United States
* Acanthothecis fontana Muscavitch & Lendemer (2016) – United States
* Acanthothecis gracilis Staiger & Kalb (1999)
* Acanthothecis gyridia (Stirt.) A.W.Archer (2005)
* Acanthothecis kalbii Dal-Forno & Eliasaro (2009)
* Acanthothecis latispora Feuerstein & Silveira (2022) – Brazil
* Acanthothecis leucopepla (Tuck.) E.A.Tripp & Lendemer (2010)
* Acanthothecis leucoxanthoides Lendemer (2014) – United States
* Acanthothecis maritima van den Boom & Sipman (2013) – Panama
* Acanthothecis megalospora Feuerstein & Lücking (2022) – Brazil
* Acanthothecis mosquitensis (Tuck.) E.A.Tripp & Lendemer (2010)
* Acanthothecis multiseptata Aptroot, Lücking & M.Cáceres (2022) – Brazil
* Acanthothecis nivalis Makhija & Adaw. (2003) – India
* Acanthothecis norstictica Aptroot, Lücking & M.Cáceres (2022) – Brazil
* Acanthothecis oryzoides Aptroot, Lücking & M.Cáceres (2022) – Brazil
* Acanthothecis pachygraphoides (Vain.) Clem. (1909)
* Acanthothecis paucispora Lendemer & R.C.Harris (2014) – United States
* Acanthothecis peplophora (M.Wirth & Hale) E.A.Tripp & Lendemer (2010)
* Acanthothecis poitaeoides (Nyl. ex Tuck.) E.A.Tripp & Lendemer (2010)
* Acanthothecis pruinocarpa Dal-Forno & Eliasaro (2009)
* Acanthothecis rimosa Aptroot, Lücking & M.Cáceres (2022) – Brazil
* Acanthothecis rosea (Vain.) Staiger & Kalb (2002)
* Acanthothecis roseola Feuerstein (2022) – Brazil
* Acanthothecis salazinica van den Boom & Sipman (2013) – Panama
* Acanthothecis sarcographoides M.Cáceres & Lücking (2013) – Brazil
* Acanthothecis saxicola Aptroot, Lücking & M.Cáceres (2022) – Brazil
* Acanthothecis socotrana (Müll.Arg.) Staiger & Kalb (2002)
* Acanthothecis subabaphoides Staiger & Kalb (2022) – Brazil
* Acanthothecis subaggregans (Müll.Arg.) A.W.Archer (2005)
* Acanthothecis subclavulifera Staiger & Kalb (2002)
* Acanthothecis subconsocians Pooja Gupta & G.P.Sinha (2015) – India
* Acanthothecis subfarinosa Feuerstein (2022) – Brazil
* Acanthothecis submuriformis Aptroot, Lücking & M.Cáceres (2022) – Brazil
* Acanthothecis tetraphora (Nyl.) Staiger & Kalb (1999)
* Acanthothecis verrucosa S.Joshi, Upreti & Hur (2017) – Vietnam
* Acanthothecis virgulicola Kantvilas (2010) – Tasmania
* Acanthothecis yokdonensis S.Joshi & Hur (2017) – Vietnam
Former species; A. salazinica S. Joshi & Hur (2013) = Acanthothecis yokdonensis