Calicium lecideinum

Calicium lecideinum (Nyl.) M. Prieto & Wedin, Fungal Diversity 82: 233. 2016. [pdf]

MycoBank MB384021

AUTHORS: Olariaga I., Prieto M.

Trachylia lecideina Nyl., Mém. Soc. Imp. Sci. Nat. Cherbourg 3: 199. 1855. [pdf]. Typification: Tibell, Svensk Bot. Tidsk. 65(2): 149. 1971. [pdf]

Cyphelium lecideinum (Nyl.) Trevis., Denkschr. Königl.-Baier. Bot. Ges. Regensburg 45: 4. 1862. [pdf]

Acolium lecideinum (Nyl.) Arnold, Denkschr. Königl.-Baier. Bot. Ges. Regensburg 57: 86. 1874. [pdf]

= Cyphelium zahlbruckneri Sampaio, Bol. Soc. Brot. sér. 2, 2: 161. 1924 [1923]* [pdf]


* Synonymy based on Tibell (Svensk Bot. Tidsk. 65(2): 149. 1971) [pdf].


Taxonomic classification

phy Ascomycota

sbp Pezizomycotina

cls Lecanoromycetes

sbc Lecanoromycetidae

ord Caliciales

fam Caliciaceae

gen Calicium

sp Calicium lecideinum


Thallus areolate, conspicuous and well-developped, glaucous grey-green, with a wrinkled surface due to the presence of coarse crystals visible under light microscopy. Photobiont layer 60-80 µm thick. Medulla plectenchymatose, composed of cylindrical hyphae, 2-3(5) µm broad, hyaline, with coarse crystals similar to those of the thallus surface. Apothecia sessile, 0.2-0.6 mm diam, up to 0.4 mm high, lens-shaped. Margin thin, pruinose, especially in young apothecia. Macedium well-developped, black. Ectal excipulum 45-50 µm thick (28-60 according to Muñiz Pérez 2013), broader at the base (up to 150 µm), of t. globulosa type, with thick-walled hyphae, brown, sclerotized. Asci cylindrical, 8-spored, evanescent, 53-62 x 3.5-4.5 µm. Ascospores ellipsoid, 1-septate, slightly constricted in the septum, acute in both poles, 9-11.5 x 5-6 µm, when immature with inconspicuous striate ornamentation, hardly visible under light microscopy, blue-green, when mature with more or less helicoid ridges, with broad, flat warts, dark brown. Paraphyses abundant, cylindrical, slightly flexuose, longer than asci, 1.4-2.2 µm broad. Photobiont trebouxioid, globose, thin-walled, 9-15 µm de diámetro. Chemistry: norstictic acid, atranorine and chloroatranorine (the latter two possibly absent in Iberian material, see Tibell 1971: 150). Macrochemical reactions (thallus) Pd= yellow turning red; KOH=yellow, C=ø.

Habitat and distribution: Calicium lecideinum seems a broadly distributed species in areas where acid rocks exist in the Iberian Peninsula. The few amount of records may be due to its small inconspicuous thalli and its habitat in shaded overhangs of granitic rocks, a microhabitat that is probably less prospected in search for lichens. Calicium corynellum and Lecanora subcarnea, more rarely Thelomma siliceum, are its typical accompanying species. Tibell (1971:150) noted the presence of two quemotypes in the European material: a chemotype with only norstictic acid, and the other one containing atranorine and cloroatranorine besides norstictic acid. The two Iberian specimens check for secondary metabolites where found to only have norstictic acid. In contrast, Muñiz Pérez (2013) stated that all the Iberian material belongs to the chemotype that has also atranorine and chloroatranorine. The spores measurements obtained from ARAN-Fungi 14822 and ARAN-Fungi 8453 are slightly shorter than those reposrted by Tibell (1971) and Muñiz-Pérez (2013), identical between each other (9-14 x 5-6 µm). Esp: Av, Ca, CR, M, Na, Sa, Tf. Port: TM.


References in our territory
  • Etayo J. 1997. Líquenes de roquedos silíceos en los Pirineos occidentales. Naturzale 12: 128. (Esp: Na) [pdf]
  • Muñiz Pérez D. 2013. Hongos calicioides en la Península Ibérica. Tesis doctoral. Universitat de Barcelona: 223. (Port: TM) [pdf]
  • Páz Bermúdez G, Carballal R, Marques J, López de Silanes MA. 2018. Catálogo de los líquenes saxícolas (Ascomycota) del área arqueológica de Siega Verde (Salamanca, España). Anales Jard. Bot. Madrid 75(2): 5. (Esp: Sa) [pdf]
  • Rowe J.G. & Egea J. 1988. Líquenes del Parque Natural de Grazalema. I Silicicolas. Acta Bot. Malacitana 13: 280. (Esp: Ca) [pdf]
  • Sampaio G. 1924. Novos materiais para a liquenologia portuguesa. Bol. Soc. Brot., Sér II, 2: 161. (Port: TM) [pdf]
  • Tibell L. 1971. The genus Cyphelium in Europe. Svensk Bot. Tidskr. 65: 149. (Port.: TM) [pdf]


Specimens in scientific collections 

* sequenced material

Reference specimen marked inbold  


Av: ARAN-Fungi 14822* (det. M. Prieto & I. Olariaga)

Ca: SEVF 3632 (det. J.G. Rowe & J.M. Ejea), SEVF 4005 (det. J.G. Rowe & J.M. Ejea).

CR: MP69 (S)*

M: MAF-Lich 22056 (det. E. Barreno & V. Rico), ARAN-Fungi 8453 (det. M. Prieto & I. Olariaga), ARAN-Fungi 15491 (det. M. Prieto & I. Olariaga), ARAN-Fungi 15666 (det. M. Prieto & I. Olariaga)

Na: Etayo 12583 (det. J. Etayo)

Sa: SANT-Lich 12299-A (det. G. Paz Bermúdez)

Tf: BC-Lich (Caliciales) 91224 (dupla in ASU 510499, det. L. Tibell), UPS L-014935 (Calic. Exs. 16), UPS-L022105



TM: BCN-Lich 15310 (rev. Muñiz), PO (holotypus of C. zahlbruckeri), UPS L-528385 (Lich. Port. Exs 35)


Sequences in public databases obtained from material collected in our territory

MP69 (S): KX512882 (LSU)

ARAN-Fungi 8453: MW991408 (LSU)


Locality and habitat of C. lecideinum (ARAN-Fungi 14822).

Calicium lecideinum occurring in a shaded overhanging granitic rock protected from rain (ARAN-Fungi 15491).

Close-up of the same thalli of Calicium lecideinum (ARAN-Fungi 15491).

Calicium lecideinum (ARAN-Fungi 14822)

Calicium lecideinum (ARAN-Fungi 14822).

Calicium lecideinum (ARAN-Fungi 15666).

Close up of Calicium lecideinum (ARAN-Fungi 15666).

Ascospores of Calicium lecideinum (ARAN-Fungi 15666). Scale bar 10 µm.

Asci of Calicium lecideinum (ARAN-Fungi 15666). Scale bar 10 µm.

Apothecial section of Calicium lecideinum (ARAN-Fungi 15666). Scale bar 10 µm.


Surface view of the ectal excipulum of C. lecideinum (ARAN-Fungi 15666). Scale bar 10 µm.

Trebouxioid photobiont (Trebouxia,  (ARAN-Fungi 15666). Scale bar 10 µm.

How to cite this sheet:

Olariaga I. & Prieto M. 2021. Calicium lecideinum (Nyl.) M. Prieto & Wedin. Fichas SIM 34. (updated on 27-IV-2021). Available at: