A new hairy Leptogium (section Mallotium) from Rio Grande do Sul State, Brazil

Abstract

-(A new hairy Leptogium (section Mallotium) from Rio Grande do Sul State, Brazil). The hairs of Leptogium species are complex structures which determine taxonomic groups within the section Mallotium. The hairs composed of cylindrical cells can be short and, when present on the surface, give origin to glass-or velvet-like hairs. Leptogium involutum, collected in Southern Brazil, a new species with velvet-like hairs is described herewith. Keywords: cylindrical cells, involute margin, Leptogium velutinum RESUMO -(Uma nova espécie de Leptogium com pêlos (seção Mallotium) do Estado do Rio Grande do Sul, Brasil). Os pêlos das espécies de Leptogium são estruturas complexas que podem determinar grupos dentro da seção Mallotium. Os pêlos compostos de células cilíndricas podem ser curtos e, quando presentes oferecem a superfície uma aparência brilhante (como vidro) ou aveludada. Leptogium involutum, coletada na região Sul do Brasil, uma espécie nova com pêlos aveludados é descrita aqui. Palavras-chave: células cilíndricas, Leptogium velutinum, margem involuta

Geographically disjunct phylogenetic lineages inLeptogium hibernicumrevealLeptogium krogiaesp. nov. from East Africa

“…While species with spherical-celled hyphal hairs, the focal group of the present study, form a monophyletic group, those with cylindricalcelled hairs occur in three distinct groups (Otálora et al 2013). Over 50 species with a Mallotium-type thallus are currently accepted (Kitaura & Marcelli 2013), including a large number of recently described taxa (Jørgensen 1973a(Jørgensen , b, 1997Awasthi & Akhtar 1977;Jørgensen & Kashiwadani 2008;Jørgensen & Olley 2010;Kitaura & Marcelli 2012Kitaura et al 2014Kitaura et al , 2015. Among these, only seven species with spherical-celled hairs are known to date (Kitaura & Marcelli 2013), of which L. burgessii (L.) Mont., L. digitatum (A.…”

“…Leptogium velutinum differs from L. krogiae in the absence of isidia and a subhymenial euparaplectenchymatous layer, thinner lobes (50–55 µm), a smooth surface (rugulose under ×20 magnification) and a velvety lower side, and the tomentum hairs have isodiametric cells at their base and cylindrical cells at their apex (Kitaura et al . 2014). Leptogium nylanderi differs from L. krogiae by having a subhymenial colloplectenchymatous layer, a euparaplectenchymatous amphithecium and an apothecium with granular isidia and thinner lobes (70–90 µm) (Kitaura & Marcelli 2013).…”

“…Over 50 species with a Mallotium -type thallus are currently accepted (Kitaura & Marcelli 2013), including a large number of recently described taxa (Jørgensen 1973 a , b , 1997; Awasthi & Akhtar 1977; Jørgensen & Kashiwadani 2008; Jørgensen & Olley 2010; Kitaura & Marcelli 2012, 2013; Kitaura et al . 2014, 2015). Among these, only seven species with spherical-celled hairs are known to date (Kitaura & Marcelli 2013), of which L. burgessii (L.) Mont., L. digitatum (A.…”

Evaluation of the environmental quality of a protected riparian forest in Southern Brazil

“…Trev., Lobaria discolor (Bory ex Delise) Hue and species from genus Chapsa and Usnea. In these areas, especially in the stands MA1 and RB2, we found some lichens that were new species for science, as well as new records for the southern hemisphere, Brazil and the state of Rio Grande do Sul (Kitaura et al 2014.…”

Five new records and an identification key of the lichen genus Leptogium from Santa Catarina state, Brazil

“…Leptogium is characterized by its large, homoiomerous, foliose thallus, by distinct cortices with at least one well-defined cortical layer (eucortex), and its mainly epiphytic habit (Otálora et al 2014). Recent studies suggest that the number of species ranges between 150 to 400 (Jayalal et al 2014 (Krempelhuber 1876;Vainio 1890;Malme 1924;Osorio 1977a;Osorio 1977b;Aptroot 2002;Spielmann 2006;Cunha 2007;Käffer et al 2007;Gumboski & Eliasaro 2011;Kitaura 2012;Kitaura & Marcelli 2012;Benatti et al 2013;Kitaura et al 2013a;Kitaura et al 2013b;Kitaura et al 2014;Cáceres et al 2014;Kitaura et al 2015).…”