Cetrelia monachorum (Zahlbr.) W.L. Culb. & C.F. Culb.

Farkas, Edit, Biró, Bernadett, Varga, Nóra, Sinigla, Mónika & Lőkös, László, 2021, Analysis of lichen secondary chemistry doubled the number of Cetrelia W. L. Culb. & C. F. Culb. species (Parmeliaceae, lichenised Ascomycota) in Hungary, Cryptogamie, Mycologie 20 (1), pp. 1-16 : 8

Cetrelia monachorum (Zahlbr.) W.L. Culb. & C.F. Culb.

( Figs 2 ; 5C ; 9 ; 12 )

It was not known before this revision as it was repeatedly misidentified before as either C. cetrarioides or C. olivetorum . It now turns out to be the most frequent Cetrelia species in Hungary ( Fig. 9 ).

The presence of atranorin, imbricaric acid (major) ± perlatolic acid (minor), anziaic acid and 4-O-demethylimbricaric acid is characteristic. Cetrelia sayanensis Otnyukova, Stepanov & Elix ( Otnyukova et al. 2009) , a closely related species, has a slightly different chemical composition containing atranorin (minor), imbricaric acid (major), perlatolic acid (minor), divaricatic acid (minor)], anziaic acid (minor), 4-O-demethylimbricaric acid (minor), glomelliferic acid (trace) and loxodellic acid (trace). However, it has pustulate-capitate soralia with farinose soredia, while C. monachorum has only seldom laminal, capitate soralia and is further characterised by coarse soredia, 52.7± 5.6 µm in Hungarian samples [vs (35)40-55 µm diam. in Obermayer & Mayrhofer (2007)], small (50-150 µm), raised pseudocyphellae on upper cortex, but very rare or lacking on lower cortex.

Cetrelia monachorum is most frequently collected from rocks (70%), but also grows on Quercus (14%), Fagus (6%), Carpinus (2%), Acer pseudoplatanus L. (1%) and on unidentified bark (7%) between 100-1000 m a.s.l. reaching the highest possible elevation in Hungary (Mátra Mts). The species is proposed for the category near threatened (NT) in Hungary.

Figures

FIG. 2. — A detail of the chromatographic plate HPTLC nr 74/2014 developed in solvent system C presenting all species under UV 254 nm (A), and sprayed with water (B). Specimens in positions A10-A17 are A10: C. olivetorum (Nyl.) W.L. Culb. & C.F. Culb. (BP 21529), A11: C. monachorum (Zahlbr.) W.L. Culb.& C.F. Culb. (BP 85318),A12: C. olivetorum (BP 84893), A13: C. cetrarioides (Delise) W.L. Culb. & C.F. Culb. (BP 21538),A14: C. olivetorum (BP 22787), A15: C. monachorum (BP 45013), A16: C. olivetorum (BP 21508), A17: C. chicitae (W.L. Culb.) W.L. Culb. & C.F. Culb. (BP 93416). Abbreviations of LSMs are according to Table 2.

FIG. 5. — Thalline lobes with marginal soralia of A, Cetrelia cetrarioides (Delise) W.L. Culb. & C.F. Culb.; B, C. chicitae (W.L. Culb.) W.L. Culb. & C.F. Culb.; C, C. monachorum (Zahlbr.) W.L. Culb. & C.F. Culb.; and D, C. olivetorum (Nyl.) W.L. Culb. & C.F. Culb. Scale bars: 1 mm.

FIG. 9. — Distribution of Cetrelia monachorum (Zahlbr.) W.L. Culb.& C.F.Culb.in Hungary.

FIG. 12. — Altitudinal distribution of Cetrelia W.L.Culb.& C.F.Culb.species in Hungary.