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The Carpathian Mts, showing the highest lichen biodiversity in Ukraine, i.e. 1,395 species of 2,106 of the total Ukrainian lichens, have been found to contain the highest proportion of regionally unique taxa (i.e. so far recorded only from the Carpathian Mts) (i.e. 551 species, or 39.5% of the Carpathian and 26.2% of the total Ukrainian lichen flora). Species diversity of widely distributed lichens (i.e. which hitherto known from all five macroregions of Ukraine), as well as ‘scarcely distributed’ lichens (i.e. missing at least in one or more macroregions) are also discussed. Representation of these three groups of lichens in the geomorphological districts of the Carpathian Mts and the administrative oblasts Zakarpattia, Lviv, Ivano-Frankivsk and Chernivtsi is shown.

The Chornohora Mts, a district of the Carpathian Mts, found to show the highest proportion of species so far recorded from this district of the Carpathian Mts, while the Eastern Beskydy and the Gorgany Mts are characterised hitherto by the highest species diversity of lichens. That is established that among geomorphological districts of Zakarpattia oblast, the Eastern Beskydy and the Gorgany Mts parts of Zakarpattia oblast territory are characterised by the highest number of species of lichen-forming and lichenicolous fungi in the Carpathian macroregion (674 and 611 species, respectively), and the proportion of regionally unique taxa in these two florae is also the highest (483 species or 71.6% and 453 species or 74.1%, respectively). Lichens of the Chyvchyn Mts of Ivano-Frankivsk oblast are found to be the most diverse in this oblast (344 species totally), and they include the highest proportion of regionally unique taxa (171 species or 49.7%). The Eastern Beskydy Mts, part of Lviv oblast territory, the only part of this oblast in the Carpathian Mts, are found to be represented by 224 lichen species of which 32 (i.e. 14.3%) are regionally unique to the Carpathian Mts.

List of the rarest taxa of the regionally unique group (hitherto known from single or a few localities) proposed as candidates for including to regional red lists of Zakarpattia, Lviv, Ivano-Frankivsk and Chernivtsi oblasts since the whole nature protection activity in Ukraine is done according to oblast division. 254 lichen species are proposed for including in the red list of Zakarpattia oblast, while 44, 4 and 9 species in the red lists of Ivano-Frankivsk, Lviv and Chernivtsi oblasts, respectively. The smallest amount of these taxa is proposed for the red list of Lviv oblast, which includes also the Forest zone of the Ukrainian Plains.

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Acta Botanica Hungarica
Authors:
S. Y. Kondratyuk
,
L. Lőkös
,
I. Kärnefelt
,
T. O. Kondratiuk
,
I. Yu. Parnikoza
,
Y. Yamamoto
,
J.-S. Hur
, and
A. Thell

Seven species new to science are described, illustrated and compared with closely related taxa. Of them, one species, i.e.: Coppinsidea vernadskiensis S. Y. Kondr., T. O. Kondratiuk et I. Yu. Parnikoza is from the Argentine Islands, Western Maritime Antarctic Peninsula, Jacke lixia hosseussii S. Y. Kondr., L. Lőkös et J.-S. Hur, from South America (Argentina and Uruguay), Loekoeslaszloa reducta Yoshik. Yamam. et S. Y. Kondr. from Eastern Asia (Japan), Orientophila viticola S. Y. Kondr., L. Lőkös et J.-S. Hur from Eastern Asia (South Korea), Ovealmbornia ovei S. Y. Kondr., L. Lőkös, I. Kärnefelt et A. Thell, and Xanthokarrooa elsiae S. Y. Kondr., L. Lőkös, I. Kärnefelt et A. Thell from Africa, as well as Oxneria imshaugii S. Y. Kondr. from North America. The new combination Jackelixia australis (for Xanthoria parietina var. australis Zahlbr.) is proposed. Jackelixia hosseussii is for the first time recorded as host for the lichenicolous fungus Arthonia anjutii S. Y. Kondr. et Alstrup. The latter species is for the first time recorded from South America. Intralichen christiansenii (D. Hawksw.) D. Hawksw. et Cole is for the first time recorded from South Korea.

Open access
Acta Botanica Hungarica
Authors:
S. Y. Kondratyuk
,
L. Lőkös
,
I. Kärnefelt
,
A. Thell
,
M.-H. Jeong
,
S.-O. Oh
,
A. S. Kondratiuk
,
E. Farkas
, and
J.-S. Hur

Seven genera new to science, i.e.: Helmutiopsis, Huriopsis, Johnsheardia, Klauskalbia, Kudratovia, Kurokawia and Poeltonia of the Physciaceae are proposed for the ‘Rinodina’ atrocinerea, the ‘Rinodina’ xanthophaea, the ‘Rinodina’ cinnamomea, the ‘Heterodermia’ obscurata, the ‘Rinodina’ straussii, the ‘Anaptychia’ isidiata and the ‘Physconia’ grisea groups consequently that all form strongly supported monophyletic branches in a phylogeny analysis based on a combined matrix of nrITS and mtSSU sequences.

Phylogenetic positions of species belonging to the genera Kashiwadia s. l., Leucodermia, Mischoblastia,Oxnerella, Phaeorrhiza s. l., Polyblastidium and Rinodinella s. l. are discussed. Oxnerella afghanica which for the first time recorded as parasitic lichen species from both epiphytic and saxicolous crustose lichens is designated as type species for the genus Oxnerella.

Sequences of the recently described Physcia orientostellaris as well as Huriopsis xanthophaea and additional sequences of Kashiwadia aff. orientalis and Mischoblastia aff. oxydata are submitted to the GenBank.

The positions of Polyblastidium casaterrinum from Costa Rica, ‘Rinodinaefflorescens from Białowieża, Poland, and ‘Mischoblastiaconfragosula from Cambodia in the Physciaceae are confirmed in a phylogeny analysis based on the nrITS sequences.

The presence of ‘extraneous mycobiont DNA’ in lichen associations is exemplified with earlier incorrect identifications of Heterodermia, Kashiwadia, Kurokawia,Oxnerella and Poeltonia specimens.

Fifty-six new combinations are presented: Helmutiopsis alba (for Rinodina alba Metzler ex Arn.), Helmutiopsis aspersa (for Lecanora aspersa Borrer), Helmutiopsis atrocinerea (for Parmelia atrocinerea Fr.), Huriopsis chrysidiata (for Rinodina chrysidiata Sheard), Huriopsis chrysomelaena (for Rinodina chrysomelaena Tuck.), Huriopsis lepida (for Lecanora lepida Nyl.), Huriopsis luteonigra (for Rinodina luteonigra Zahlbr.), Huriopsis plana (for Rinodina plana H. Magn.), Huriopsis thiomela (for Lecanora thiomela Nyl.), Huriopsis xanthomelana (for Rinodina xanthomelana Müll. Arg.), Huriopsis xanthophaea (for Lecanora xanthophaea Nyl.), Johnsheardia cinnamomea (for Rinodina mniaroea var. cinnamomea Th. Fr.), Johnsheardia herteliana (for Rinodina herteliana Kaschik), Johnsheardia jamesii (for Rinodina jamesii H. Mayrhofer), Johnsheardia reagens (for Rinodina reagens Matzer et H. Mayrhofer), Johnsheardia zwackhiana (for Lecanora zwackhiana Kremp.), Kashiwadia austrostellaris (for Physcia austrostellaris Elix), Kashiwadia jackii (for Physcia jackii Moberg), Kashiwadia littoralis for Physcia littoralis Elix), Kashiwadia nubila (for Physcia nubila Moberg), and Kashiwadia tropica (for Physcia tropica Elix), Klauskalbia crocea (for Heterodermia crocea R. C. Harris), Klauskalbia flabellata (for Parmelia flabellata Fée), Klauskalbia obscurata (for Physcia speciosa (Wulfen) Nyl. *obscurata Nyl.), Klauskalbia paradoxa (for Heterodermia paradoxa Schumm et Schäfer-Verwimp), Kudratovia bohlinii (for Rinodina bohlinii H. Magn.), Kudratovia candidogrisea (for Rinodina candidogrisea Hafellner, Muggia et Obermayer), Kudratovia luridata (for Buellia luridata Körb.), Kudratovia metaboliza (for Rinodina metaboliza Vain.), Kudratovia pycnocarpa (for Rinodina pycnocarpa H. Magn.), Kudratovia roscida (for Lecanora roscida Sommerf.), Kudratovia straussii (for Rinodina straussii J. Steiner), Kudratovia terrestris (for Rinodina terrestris Tomin), Kurokawia bryorum (for Anaptychia bryorum Poelt), Kurokawia isidiata (for Anaptychia isidiata Tomin), Kurokawia mereschkowskii (for Physcia mereschkowskii Tomin), Kurokawia palmulata (for Psoroma palmulatum Michx.), Kurokawia runcinata (for Lichen runcinatus With.), Kurokawia stippea (for Parmelia aquila var. stippea Ach.), Lecania safavidiorum (for Oxnerella safavidiorum S. Y. Kondr., Zarei-Darki, Lőkös et Hur), Leucodermia erinacea (for Lichen erinaceus Ach.), Mischoblastia confragosula (for Lecanora confragosula Nyl.), Mischoblastia destituta (for Lecidea destituta Nyl.), Mischoblastia moziana (for Lecanora moziana Nyl.), Mischoblastia moziana subsp. parasitica (comb. et stat. nova for Rinodina moziana var. parasitica Kaschik et H. Mayrhofer), Mischoblastia ramboldii (for Rinodina ramboldii Kaschik), Mischoblastia vezdae (for Rinodina vezdae H. Mayrhofer), Oxnerella afghanica (for Rinodina afghanica M. Steiner et Poelt), Oxnerella castanomelodes (for Rinodina castanomelodes H. Mayrhofer et Poelt), Physciella nigricans (for Lecanora nigricans Flörke), Poeltonia elegantula (for Physconia elegantula Essl.), Poeltonia grisea (for Lichen griseus Lam.), Poeltonia isidiomuscigena (for Physconia isidiomuscigena Essl.), Poeltonia perisidiosa (for Physcia perisidiosa Erichsen), Poeltonia venusta (for Parmelia venusta Ach.), and Polyblastidium albicans (for Parmelia albicans Pers.) are proposed.

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Acta Botanica Hungarica
Authors:
S. Y. Kondratyuk
,
L. Lőkös
,
J. P. Halda
,
M. Haji Moniri
,
E. Farkas
,
J. S. Park
,
B. G. Lee
,
S.-O. Oh
, and
J.-S. Hur

Data on about 27 new for South Korea species of lichen-forming and lichenicolous fungi, including one new for science genus Verseghya and 11 new for science species, i.e.: Agominia loekoesii, Lecanora pseudosambuci, Nectriopsis verseghyklarae, Polysporina golubkovae, Protoparmeliopsis zerovii, Psoroglaena chirisanensis, Pyrenopsis chejudoensis, Ropalospora chirisanensis, Thelopsis chirisanensis, Trapelia coreana, and Verseghya klarae, as well as 27 taxa newly recorded for the country (Biatora aff. subduplex, Buellia cf. uberior, Caloplaca kedrovopadensis, Catillaria chalybaea, Coenogonium isidiatum, Dibaeis yurii, Halecania australis, H. lobulata, Intralichen christiansenii, Ivanpisutia oxneri, Lecania cf. olivacella, Lecanora lojkahugoi, L. sulphurea, Lecidella mandshurica, Lichenoconium erodens, Micarea lithinella, M. aff. stipitata, Muellerella pygmaea var. pygmaea, Oxneria alfredii, Pertusaria aff. flavocorallina, Phaeosporobolus alpinum, Polycoccum innatum, Porina fluminea, Rinodina xanthophaea, Ropalospora chloantha, Stigmidium cladoniicola, and S. epiramalina) are provided.

Additional localities for the recently reported or described 39 species from South Korea, and for 1 species (Oxnerella safavidiorum) from Iran and China (for the first time for China) are provided.

The following taxa newly recorded for South Korea, i.e. Ivanpisutia oxneri, Lecanora lojkahugoi, Lecidella mandshurica, Rinodina xanthophaea, Ropalospora chloantha, as well as the newly described Buellia chujadoensis and Verseghya klarae found to be rather common in this country.

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The new species Megaspora iranica M. Haji Moniri et S. Y. Kondr. is described from NE Iran, illustrated and compared with closely related taxa. It is similar to the recently described M. rimisorediata, which is known from Eurasia (from SE Europe and Middle Asia (Armenia) to Central Asia, i.e. Iran and China), but differing in having larger thallus, smaller soredia, thicker cortical layer of thallus, thicker hymenium, narrower ascospores and thinner ascospore wall. Megaspora rimisorediata is for the first time recorded from Europe (eastern Ukraine, Kharkiv oblast). Additional data to its diagnosis is given based on extensive collections from Eurasia. The new genus Oxneriaria S. Y. Kondr. et L. Lőkös (for the former Aspicilia mashiginensis group) found to be a member of the Sagedia clade and positioning in distant position from the Aspicilia / Circinaria clade after three gene phylogeny based on nrITS, 28S nrLSU and 12S mtSSU sequences. The members of the genus Oxneriaria mainly distributed in cold polar and high altitude localities of Eurasia and the northern hemisphere. Nine new combinations, i.e.: Oxneriaria dendroplaca (basionym: Lecanora dendroplaca H. Magn.), Oxneriaria haeyrenii (basionym: Lecanora haeyrenii H. Magn.), Oxneriaria mashiginensis (basionym: Lecanora mashiginensis Zahlbr.), Oxneriaria nikrapensis (basionym: Aspicilia nikrapensis Darb.), Oxneriaria permutata (basionym: Lecanora permutata Zahlbr.), Oxneriaria rivulicola (basionym: Lecanora rivulicola H. Magn.), Oxneriaria supertegens (basionym: Aspicilia supertegens Arnold), Oxneriaria verruculosa (basionym: Aspicilia verruculosa Kremp.), and Oxneriaria virginea (basionym: Aspicilia virginea Hue) are proposed.

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Acta Botanica Hungarica
Authors:
M. Haji Moniri
,
S. Y. Kondratyuk
, and
P. P. G. van den Boom

A new for science species Lecania makarevicziae differing from L. pallida in having knobby to squamulose, blastidiate thallus, in having larger apothecia, in having a dark violet-brown disc, in having a plane disc, in having (1–2–)3-septate ascospores with slightly distinct constrictions at the septum, as well as in the lack of dense bluish pruina on apothecium disc, from Iran and Turkmenistan, is described, compared with closely related taxa.

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Acta Botanica Hungarica
Authors:
T. O. Kondratiuk
,
S. Y. Kondratyuk
,
M. V. Khimich
,
T. V. Beregova
, and
L. I. Ostapchenko

Status of black melanin-containing yeast-like fungus Exophiala alcalophila isolated from microorganism complex of hermetic damaged in conditions of indoor high humidity in Kiev, Ukraine is proved by combined phylogenetic analysis based on sequences of the internal transcribed spacer 1 (ITS1), the 5.8S gene and the internal transcribed spacer 2 (ITS2) nrDNA, beta-tubulin gene and translation elongation factor 1-alpha gene. Sequences of the mentioned genes of Ukrainian specimen of E. alcalophila are for the first time submitted to the GenBank.

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Acta Botanica Hungarica
Authors:
S. Y. Kondratyuk
,
L. Lőkös
,
E. Farkas
,
S.-H. Jang
,
D. Liu
,
J. Halda
,
P.-E. Persson
,
M. Hansson
,
I. Kärnefelt
,
A. Thell
, and
J.-S. Hur

Three new genera Coppinsidea, Vandenboomia and Wolseleyidea are described and the genera Ivanpisutia, Lecaniella and Myrionora are resurrected on the basis of a phylogenetic analysis of multi-locus sequence data of the Ramalinaceae including the nuclear protein-coding marker rpb2, the internal transcribed spacer and a fragment of the small mitochondrial subunit. The genus Hertelidea was positioned within the Ramalina clade of the phylogenetic tree of the Ramalinaceae. Bacidia sipmanii, Phyllopsora chlorophaea, P. castaneocincta and Ramalina subbreviuscula were recorded from South Korea for the first time here confirming by molecular data, too.

Forty-eight new combinations are proposed: Bacidia alnetorum (basionym: Biatora alnetorum S. Ekman et Tønsberg), Biatora amazonica (basionym: Phyllopsora amazonica Kistenich et Timdal), Biatora cuyabensis (basionym: Lecidea cuyabensis Malme), Biatora halei (basionym: Pannaria halei Tuck.), Biatora kalbii (basionym: Phyllopsora kalbii Brako), Biatora subhispidula (basionym: Psoroma subhispidulum Nyl.), Coppinsidea alba (basionym: Catillaria alba Coppins et Vězda), Coppinsidea aphana (basionym: Lecidea aphana Nyl.), Coppinsidea croatica (basionym: Catillaria croatica Zahlbr.), Coppinsidea fuscoviridis (basionym: Bilimbia fuscoviridis Anzi), Coppinsidea pallens (basionym: Bilimbia pallens Kullh.), Coppinsidea ropalosporoides (basionym: Gyalidea ropalosporoides S. Y. Kondr., L. Lőkös et J.-S. Hur), Coppinsidea scotinodes (basionym: Lecidea scotinodes Nyl.), Coppinsidea sphaerella (basionym: Lecidea sphaerella Hedl.), Ivanpisutia hypophaea (basionym: Biatora hypophaea Printzen et Tønsberg), Ivanpisutia ocelliformis (basionym: Lecidea ocelliformis Nyl.), Lecaniella belgica (basionym: Lecania belgica van den Boom et Reese Naesb.), Lecaniella cyrtellina (basionym: Lecanora cyrtellina Nyl.), Lecaniella dubitans (basionym: Lecidea dubitans Nyl.), Lecaniella erysibe (basionym: Lichen erysibe Ach.), Lecaniella hutchinsiae (basionym: Lecanora hutchinsiae Nyl.), Lecaniella naegelii (basionym: Biatora naegelii Hepp), Lecaniella prasinoides (basionym: Lecania prasinoides Elenkin), Lecaniella sylvestris (basionym: Biatora sylvestris Arnold), Lecaniella tenera (basionym: Scoliciosporum tenerum Lönnr.), Mycobilimbia albohyalina (basionym: Lecidea anomala f. albohyalina Nyl.), Mycobilimbia cinchonarum (basionym: Triclinum cinchonarum Fée), Mycobilimbia concinna (basionym: Phyllopsora concinna Kistenich et Timdal), Mycobilimbia ramea (basionym: Bacidina ramea S. Ekman), Mycobilimbia siamensis (basionym: Phyllopsora siamensis Kistenich et Timdal), Myrionora australis (basionym: Biatora australis Rodr. Flakus et Printzen), Myrionora ementiens (basionym: Lecidea ementiens Nyl.), Myrionora flavopunctata (basionym: Lecanora flavopunctata Tønsberg), Myrionora globulosa (basionym: Lecidea globulosa Flörke), Myrionora hemipolia (basionym: Lecidea arceutina f. hemipolia Nyl.), Myrionora lignimollis (basionym: Biatora ligni-mollis T. Sprib. et Printzen), Myrionora malcolmii (basionym: Phyllopsora malcolmii Vězda et Kalb), Myrionora vacciniicola (basionym: Lecidea vacciniicola Tønsberg), Phyllopsora agonimioides (basionym: Coenogonium agonimioides J. P. Halda, S.-O. Oh et J.-S. Hur), Phyllopsora sunchonensis (basionym: Agonimia sunchonensis S. Y. Kondr. et J.-S. Hur), Vandenboomia chlorotiza (basionym: Lecidea chlorotiza Nyl.), Vandenboomia falcata (basionym: Lecania falcata van den Boom, M. Brand, Coppins, Magain et Sérus.), Wolseleyidea africana (basionym: Phyllopsora africana Timdal et Krog), Wolseleyidea byssiseda (basionym: Lecidea byssiseda Nyl. ex Hue), Wolseleyidea canoumbrina (basionym: Lecidea canoumbrina Vain.), Wolseleyidea furfurella (basionym: Phyllopsora furfurella Kistenich et Timdal), Wolseleyidea ochroxantha (basionym: Lecidea ochroxantha Nyl.), and Wolseleyidea swinscowii (basionym: Phyllopsora swinscowii Timdal et Krog). The combination Biatora longispora (Degel.) Lendemer et Printzen is validated here. The new names Biatora vezdana for Lecania furfuracea Vĕzda and Coppinsidea vainioana for Lecidea sphaeroidiza Vain. are proposed. The phenomenon of presence of ‘extraneous mycobiont DNA’ in lichen association, i.e. DNA, belonging neither to mycobiont nor photobiont or to endophytic fungi is for the first time illustrated. So the presence of nrITS and mtSSU sequences of crustose lichen Coppinsidea ropalosporoides in thalli of crustose Verrucaria margacea and foliose Kashiwadia orientalis, as well as nrITS of Phyllopsora sp. KoLRI in Agonimia pacifica and Biatora longispora, or nrITS and mtSSU of Biatora longispora in thalli of Agonimia pacifica, Oxneriopsis oxneri and Pyxine limbulata, Ivanpisutia oxneri in thalli of Rinodina xanthophaea, etc. is documented. Scarce cases of presence of ‘extraneous mycobiont DNA’ in representatives of the Teloschistaceae, Physciaceae known from literature data are discussed, too.

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Acta Botanica Hungarica
Authors:
S. Y. Kondratyuk
,
L. Lőkös
,
D. K. Upreti
,
S. Nayaka
,
G. K. Mishra
,
S. Ravera
,
M.-H. Jeong
,
S.-H. Jang
,
J. S. Park
, and
J.-S. Hur

Seventeen robust monophyletic branches newly discovered in the phylogenetic tree of the Teloschistaceae after separate nrITS, nrLSU and mtSSU, as well as combined phylogenetic analysis are proposed to consider as the following separate genera: Dijigiella S. Y. Kondr. et L. Lőkös gen. nov. for the D. kaernefeltiana group, Elixjohnia S. Y. Kondr. et J.-S. Hur gen. nov. for the Sirenophila jackelixii group, Fominiella S. Y. Kondr., D. Upreti et J.-S. Hur gen. nov. for the F. tenerifensis group; Gintarasiella S. Y. Kondr. et J.-S. Hur gen. nov. for Caloplaca aggregata, Hanstrassia S. Y. Kondr. gen. nov. for the Elenkiniana lenae group, Harusavskia S. Y. Kondr. gen. nov. for H. elenkinianoides sp. n., Huriella S. Y. Kondr. et D. Upreti gen. nov. for H. loekoesiana sp. n., Ikaeria S. Y. Kondr., D. Upreti et J.-S. Hur gen. nov. for Caloplaca aurantiellina, Klauderuiella S. Y. Kondr. et J.-S. Hur gen. nov. for the Variospora thallincola group, Laundonia S. Y. Kondr., L. Lőkös et J.-S. Hur gen. nov. for the Gyalolechia flavovirescens group, Lazarenkoiopsis S. Y. Kondr., L. Lőkös et J.-S. Hur gen. nov. for Caloplaca ussuriensis, Nevilleiella S. Y. Kondr. et J.-S. Hur gen. nov. for the Caloplaca marchantii group, Opeltia S. Y. Kondr. et L. Lőkös gen. nov. for the Caloplaca neobaltistanica group, Oxneriopsis S. Y. Kondr., D. Upreti et J.-S. Hur gen. nov. for the Caloplaca oxneri group, Teuvoahtiana S. Y. Kondr. et J.-S. Hur gen. nov. for the Caloplaca rugulosa group, Tomnashia S. Y. Kondr. et J.-S. Hur gen. nov. for the Polycauliona rosei group, and Xanthaptychia S. Y. Kondr. et S. Ravera gen. nov. for the Seirophora orientalis group.

Hitherto missing molecular data on three gene sequences of the type species of the genera Seirophora and Sirenophila are completed within this study.

Six new to science species (Dijigiella kaernefeltiana S. Y. Kondr. sp. n., D. subaggregata S. Y. Kondr. et Kärnefelt sp. n., Fominiella tenerifensis S. Y. Kondr., Kärnefelt, A. Thell et T. Feuerer sp. n., Hanstrassia jaeseounhurii S. Y. Kondr., Ch.-H. Park et L. Lőkös sp. n., Harusavskia elenkinianoides S. Y. Kondr., X. Y. Wang, S.-O. Oh et J.-S. Hur sp. n., Huriella loekoesiana S. Y. Kondr. et D. Upreti sp. n.) are described, compared with closely related taxa.

A total of 34 new combinations for genera mentioned above are proposed.

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Acta Botanica Hungarica
Authors:
S. Y. Kondratyuk
,
P.-E. Persson
,
M. Hansson
,
L. Lőkös
,
D. Liu
,
J.-S. Hur
,
I. Kärnefelt
, and
A. Thell

Two new genera in the subfamily Teloschistoideae (Teloschistaceae, Teloschistales) are described: Hosseusiella S. Y. Kondr., L. Lőkös et A. Thell for the Caloplaca chilensis group including three South American species and Rehmanniella S. Y. Kondr. et J.-S. Hur for the new species, R. wirthii S. Y. Kondr. from South Africa. The new genera are supported by a three-gene phylogeny based on ITS1/ITS2 nrDNA, 28S nrLSU, and 12S mtSSU sequences. The new taxonomic position of Elixjohnia ovis-atra in the subfamily Teloschistoideae is discussed. The two new species Hosseusiella gallowayiana and Rehmanniella wirthii are described, illustrated and compared with closely related taxa. Hosseusiella gallowayiana is recorded for the first time as the host for the lichenicolous fungus Arthonia tetraspora S. Y. Kondr. A key to the species of Hosseusiella is included, as well as new information of the related genus Follmannia. The following new combinations are proposed: Hosseusiella chilensis (Kärnefelt, S. Y. Kondr., Frödén et Arup) S. Y. Kondr., L. Lőkös, Kärnefelt et A. Thell, Hosseusiella pergracilis (Zahlbr.) S. Y. Kondr., L. Lőkös, Kärnefelt et A. Thell and Elixjohnia ovis-atra (Søchting, Søgaard et Sancho) S. Y. Kondr.

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