Evgeny A. Davydov

Rare and noteworthy boreal lichens from the Altai Mountains (South Siberia, Russia)

Abstract Based on field trips between 1995–2007, rare and noteworthy lichens from the Altai Mountains in southern Siberia are described. Bacidia zerovii Oxner is recognized as a synonym of Scoliciosporum chlorococcum (Graewe ex Stenh.) Vězda. Lecidea brenneri H. Magn. is lectotypified and synonymized with Lecania cyrtellina (Nyl.) Sandst. The new combination Puttea exsequens (Nyl.) Printzen & Davydov is introduced for Lecidea exsequens Nyl. and is the oldest validly published name for Lecidea gibberosa sensu Th. Fr. non Ach. Of the 33 species reported here, five species – Lecania croatica, Lecanora pseudosarcopidoides, Lecidea, L. sanguineoatra, Puttea exsequens and Rimularia fuscosora are new for Asia and Russia, Buellia arborea is new to Asia, Lecanora farinaria is new to Russia, Caloplaca herbidella, C. sorocarpa, Fellhanera subtilis, Lecidea pullata, and Pertusaria coccodes are new to Siberia. Several species are reported as new to West or South Siberia. Most corticolous lichen species display a more or less circumboreal distribution and also occur in Europe and North America.

Absence of anthraquinone pigments is paraphyletic and a phylogenetically unreliable character in the Teloschistaceae

It has been suggested that the absence of anthraquinones is not a synapomorphic character, but appears independently in unrelated lineages of Teloschistaceae . We analyzed ITS nrDNA regions in species of the genus Caloplaca and present evidence for five such examples: the Caloplaca cerina group, C. obscurella , the C. servitiana group, the C. xerica group and the C. variabilis group ( Pyrenodesmia ). In some cases, loss of anthraquinones is observed only in individuals within ordinarily pigmented populations, but sometimes the loss covers whole lineages containing one or more species. Both situations are observed in the C. servitiana group. Loss of anthraquinones is always followed by the synthesis of ‘alternative’ pigments (often Sedifolia -grey). In the specimens with anthraquinone-containing apothecia studied, these pigments are not visible in apothecial sections after dissolving anthraquinones in K. Fully unpigmented apothecia have not been observed. The Caloplaca xerica group is a newly established, infraspecific grouping of species related to, and similar to, C. xerica . The Caloplaca servitiana group is also newly established and represents an isolated lineage covering two rather different, but related species. Caloplaca neotaurica is described here as a new species with apothecia of two colour variants; orange-red (with anthraquinones) and grey (with Sedifolia -grey). The genus Huea represents another taxon lacking anthraquinones within Teloschistaceae . The genera Apatoplaca and Cephalophysis , which lack anthraquinones, are tentatively placed in Teloschistaceae , but their phylogenetic identity has not been recognized. Hueidea is reported to have no anthraquinones, but its secondary metabolites should be studied further and its possible placement in Teloschistaceae assessed. We suggest that Caloplaca abbreviata var. lecideoides and C. celata represent variants of C. stillicidiorum lacking anthraquinones.

The systematic position of Lasallia caroliniana (Tuck.) Davydov, Peršoh & Rambold comb. nova and considerations on the generic concept of Lasallia (Umbilicariaceae, Ascomycota)

Detailed morphological investigations and phylogenetic analyses of the ITS/5.8S nrDNA reveal Umbilicaria caroliniana to be a member of Lasallia. A new combination, Lasallia caroliniana (Tuck.) Davydov, Peršoh & Rambold comb. nov., is proposed. The circumscription of Lasallia is extended by the character state of eight-spored asci. According to the new concept, Lasallia is distinguished from Umbilicaria by comprising species which combine large, multicellular, brown ascospores and a pustulate thallus. The functionally significant differences in ascospore morphology justify the current division of Umbilicariaceae into Lasallia and Umbilicaria, although Umbilicaria remains paraphyletic.

The extensive geographical range of several species of Teloschistaceae : evidence from Russia

The current view of the geographical ranges of lichens is often distorted by overly narrow or overly broad applications of names and by insufficient survey of most regions of the world. Here we present several cases where species of Teloschistaceae formerly thought to be limited to rather small territories in the western or eastern parts of Eurasia are in fact widespread in northern Eurasia. We support our findings with ITS nrDNA data in several new trees showing relationships in the genera Athallia , Calogaya , Caloplaca , Flavoplaca and Gyalolechia . The widespread species have little in common, except that most of them reproduce both sexually and asexually, and we discuss the possible influence of the combined reproduction on geographical range. Calogaya bryochrysion , Calogaya saxicola , Gyalolechia epiphyta and Gyalolechia ussuriensis are new combinations. Calogaya alaskensis is a younger synonym for C. bryochrysion . The generally arctic-alpine Calogaya bryochrysion also occurs on the bark of solitary trees in dry parts of the Altai Mountains. The Australian Flavoplaca cranfieldii is a younger synonym of F. flavocitrina . Gyalolechia epiphyta has been described numerous times, from different regions and substrata, as Caloplaca juniperi , C. laricina , C. tarani , Gyalolechia arizonica and G. juniperina . The name Gyalolechia xanthostigmoidea has recently been used for G. epiphyta , but it represents a distinct taxon. Gyalolechia ussuriensis is closely related to and morphologically indistinguishable from G. persimilis , but they have a different ecology and distribution and we regard them as distinct species. Caloplaca juniperina Tomin is lectotypified.

Stictis and Schizoxylon (Stictidaceae, Ostropales) in Russia

Abstract: Konoreva, L. A., Chesnokov, S. V. & Davydov, E. A. 2016. Stictis and Schizoxylon (Stictidaceae, Ostropales) in Russia. — Herzogia 29: 706–711. The distribution and ecology of Schizoxylon albescens, Stictis brunnescens and S. radiata in Russia is discussed. Schizoxylon albescens is new for Russia and Asia, Stictis brunnescens is new for North Asia, Stictis radiata is reported for the first time for the Asian part of Russia from the Altai Mountains, Salair Ridge (Altaysky Krai), the Sayan Mountains (Krasnoyarsk Krai), Sakha Republic and Kodar Ridge (Zabaykalsky Krai) as well as additionally recorded from the Kola Peninsula (Murmansk region).

Candelariella blastidiata sp. nov. (Ascomycota, Candelariaceae) from Eurasia and North America, and a key for grey thalli Candelariella

Candelariella blastidiata Yakovchenko sp. nov. is described. This corticolous species is characterized by biatorine yellow apothecia, a grey squamulose thallus with marginal and lower side blastidia, 8-spored asci, and a northern circumpolar distribution. Candelariella subdeflexa has previously been confused with C. blastidiata , but our analyses of phenotypic and DNA sequence data revealed C. blastidiata should be distinguished from C. subdeflexa . A worldwide key for Candelariella species with grey thalli is provided.

Buellia lacteoidea New to Eurasia from Transbaikal Territory (South Siberia, Russia)

Abstract: Yakovchenko, L., Galanina, I. & Davydov, E. A. 2017. Buellia lacteoidea new to Eurasia from Transbaikal Territory (South Siberia, Russia). – Herzogia 30: 515–519. Yakovchenko, L., Galanina, I. & Davydov, E. A. 2017. Buellia lacteoidea neu für Eurasien aus Transbaikalien (Südsibirien, Russland) – Herzogia 30: 515–519. Buellia lacteoidea (Physciaceae, lichenized Ascomycetes), hitherto only known from western North America, is reported from the Transbaikal Territory (South Siberia, Russia). A morphological description based on the Russian material is provided.