taxonID	type	description	language	source
038087B37A441559FCA6FC22C112F9A4.taxon	description	(Figs 1 C; 2; 5 A; 6; 7; 12) It is characterised by the presence of atranorin, perlatolic acid (major), ± imbricaric acid (minor) and anziaic acid. The lack of 4 - O-demethylimbricaric acid is obvious and well observable already under UV 254 nm after developing the HPTLC plate (Fig. 2). Its soredia are fine [25 - 35 (- 40) µm in diam. – Obermayer & Mayrhofer (2007)], 32.3 ± 3.4 µm in Hungarian samples. Not or slightly raised pseudocyphel - lae of various size (c. 30 - 300 µm) occur on upper cortex, smaller ones on lower cortex. Its specimens were found most frequently on oak (Quercus sp. – 38 %), beech (Fagus sylvatica L. – 15 %) and other tree species (46 %) at lower elevations than in Austria (Obermayer & Mayrhofer 2007), mostly at 200 - 600 m a. s. l., though in Belarus it occurs at even lower elevation (Bely et al. 2014). This species proved to be less frequent than expected (Figs 6; 7), and was previously confused with C. monachorum. Cetrelia cetrarioides is considered here as a critically endangered (CR) species in Hungary.	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
038087B37A441558FC8EF9E4C00FF845.taxon	description	(Figs 1 A; 2; 3; 5 B; 8; 12) It is easy to recognise by a here revised characteristic composition of LSMs detected by HPTLC and TLC: atranorin, 4 - O-methylphysodic acid, α- collatolic acid, β- collatolic acid, physodic acid, α- alectoronic acid, β- alectoronic acid. Since this species was described from the United States (West Virginia, Pocahontas Co., Gaudiner Knob, Hale, Lich. Amer. Exs. 56 – holotype-DUKE) and has not been confirmed from Europe by Mark et al. (2018), special attention was paid to its identification. All specimens available in BP and VBI were studied by TLC and HPTLC (Fig. 2). In addition to the previously studied compounds (cf. Culberson & Culberson 1968; Obermayer & Mayrhofer 2007), the identification of α- collatolic acid, β- collatolic acid, α- alectoronic acid and β- alectoronic acid (i. e., β- collatolic acid and β- alectoronic acid as newly identified susbstances of the above list) was possible by using an anisaldehyde / sulphuric acid spray on regular TLC plates (Fig. 3). Based on the seven substances above it was found that specimens from Hungary, Poland, Ukraine, Romania, Italy had the same pattern of substances as the three specimens from the United States, containing one from Pocahontas County (BP 91365), collected very near the type locality. Most of these specimens contained one or two additional unidentified minor substances, observable only under UV 366 prior to sulphuric acid treatment in position below atranorin and above 4 - O-methylphysodic acid. The specimen collected near the type locality (BP 91365) contained both of these substances and a third one. This third unidentified component had the same travelling distance on the plate as that of 4 - O-methylphysodic acid. One of the two Hungarian specimens (BP 49905) contained the upper unknown, the other (BP 71276) the lower one. The Polish sample (BP 21508) and one of the Ukrainian samples (BP 21504) contained both of these unknowns. Furthermore, the Italian (VBI 1742) and a part of a Ukrainian specimen (BP 22781) was lacking atranorin. The occurrence of abovementioned unknown substances within specimens might be explained by the possibly non-monophyletic origin of C. chicitae suggested by Mark et al. (2018). It needs further studies, since the specimens from Virginia (United States) (BP 91365, BP 93416 and BP 75822) are not homogeneous either in the presence of these unknown substances. Apart from the chemical composition, the somewhat twisted, wavy soralia are also characteristic features. Its soredia are coarse, 46.1 ± 7.3 µm in diam. (cf. (35 -) 40 - 55 µm in Obermayer & Mayrhofer 2007). Pseudocyphellae are large (150 - 500 µm), not raised on upper cortex, lacking from lower cortex. Both Hungarian specimens of C. chicitae were found on beech (Fagus sylvatica) at 450 - 600 m a. s. l., one from the Bükk [BP 71276 sub Parmelia cetrarioides var. typica] and the other in the Zemplén Mts [BP 49905 sub Parmelia cetrarioides] (as P. cetrarioides) (Fig. 8). This is the rarest Cetrelia species in Hungary. As it has not been collected since 1961, Cetrelia chicitae is here proposed as critically endangered (CR (PE )) lichen species in Hungary.	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
038087B37A4B1556FF7EFAC5C1F7F9C4.taxon	description	(Figs 2; 5 C; 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.	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
038087B37A4B1552FCB9F907C628FDB9.taxon	description	(Figs 2; 5 D; 10 - 12) It is the easiest of the four species to identify because olivetoric acid produces a characteristic, water repellent spot on the chromatographic plate, although a wider species concept previously (Wirth 1980; Verseghy 1988, 1994, Smith et al. 2009) also was applied for specimens not containing olivetoric acid (here revised mostly as C. monachorum by HPTLC). Cortical atranorin is also present. This species forms soredia varying from fine to coarse, 36.4 ± 9.5 µm in Hungarian samples [versus 25 - 55 µm diam. inObermayer & Mayrhofer (2007)], while pseudocyphellae – if any – are rare on both upper and lower cortex and small (20 - 50 µm). This species was collected from rocks (39 %), but was mostly found on bark of Quercus (13 %), Fagus (9 %) and various unidentified trees (39 %) at 100 - 800 m a. s. l. It is the second most frequent species of Cetrelia, known from a moderate 26 collections (Figs 10; 11). Cetrelia olivetorum is proposed as vulnerable (VU) in the Hungarian red-list.	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
038087B37A4F1552FF41FA64C510F8B4.taxon	description	MYCOBANK NO. — MB 435214.	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
038087B37A4F1552FF41FA64C510F8B4.taxon	materials_examined	LECTOTYPE. — (designated here under no. MBT 392402): Hungary. Mohás trachyttufa sziklán. “ Keserűs-hegy ” c. 500 m. Dömös mel., Esztergom vm.; leg.: Timkó Gy., 12. X. 1913. (BP 21492 sub Parmelia cetrarioides).	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
038087B37A4F1552FF6BF884C1E8FE98.taxon	materials_examined	Type specimens (holotype, isotype and one additional authentic specimen) of Parmelia olivaria var. subvenosa Gyeln. were also checked and evaluated. The holotype (BP 22803, T 636 / a) specimen was confirmed as Cetrelia olivetorum (Culberson & Culberson 1968), however the isotype (BP 22802, T 636 / b) and an additional specimen from the same place and date (BP 21493) proved to be C. monachorum after the revision.	en	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): 1-16, DOI: 10.5252/cryptogamie-mycologie2021v42a1, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2021v42a1
