Armin Mangold

A world-wide key to the thelotremoid Graphidaceae , excluding the Ocellularia - Myriotrema - Stegobolus clade

In the course of an ongoing systematic and taxonomic revision of the lichen family Graphidaceae (including Thelotremataceae ), we present world-wide keys to the currently accepted thelotremoid genera and species, excluding the columellate taxa and their relatives of the Ocellularia - Myriotrema - Stegobolus clade ( Melanotrema , Myriotrema , Ocellularia , Ocellularia clandestina group, Redingeria , Stegobolus ), which will be treated in a forthcoming paper. The keys include all genera and species with chroodiscoid, lepadinoid, and topeliopsidoid apothecia and other taxa featuring periphysoids or fibrils, and their relatives. Taxa keyed out to genus and species level are Acanthotrema , Chapsa , Chroodiscus , Diploschistes , Fibrillithecis , Gyrotrema , Leptotrema , Leucodecton , Melanotopelia , the ‘ Ocellularia ’ cruentata group, Pseudoramonia , Reimnitzia , Schizotrema , Thelotrema , Topeliopsis and Wirthiotrema . Over 260 species are treated, including a few yet unnamed taxa. The following taxonomic and nomenclatural novelties are introduced: Acanthotrema frischii Lucking sp. nov., Chapsa aggregata (Hale) Sipman & Lucking comb. nov., C. albida (Nyl.) Lucking & Sipman comb. nov.; C. albomaculata (Sipman) Sipman & Lucking comb. nov., C. boninensis (Tat. Matsumoto) Rivas Plata & Mangold comb. nov., C. elabens (Mull. Arg.) Rivas Plata & Mangold comb. nov., C. imperfecta (Hale) Rivas Plata & Lucking comb. nov., C. laceratula (Mull. Arg.) Rivas Plata & Lucking comb. nov., C. magnifica (Berk. & Broome) Rivas Plata & Lucking comb. nov., C. meghalayensis (Patw. & Nagarkar) Lumbsch & Divakar comb. nov., C. meridensis (Kalb & Frisch) Lucking, Lumbsch & Rivas Plata comb. nov., C. mirabilis (Zahlbr.) Lucking comb. nov., C. neei (Hale) Mangold & Lucking comb. nov., C. paralbida (Riddle) Rivas Plata & Lucking comb. nov., C. pseudoexanthismocarpa (Patw. & C. R. Kulk.) Rivas Plata & Lucking comb. nov., C. pulvereodisca (Hale) Rivas Plata & Mangold comb. nov., C. scabiomarginata (Hale) Rivas Plata & Lucking comb. nov., C. waasii (Hale) Sipman & Lucking comb. nov., Fibrillithecis argentea (Mull. Arg.) Rivas Plata & Lucking comb. nov., F. carneodisca (Hale) Rivas Plata & Lucking comb. nov., F. confusa Lucking, Kalb & Rivas Plata spec. nov., F. diminita (Hale) Rivas Plata & Lucking comb. nov., F. eximia (R. C. Harris) Rivas Plata & Lucking comb. nov., F. fissurata (Nagarkar & Hale) Rivas Plata & Lucking comb. nov., F. gibbosa (H. Magn.) Rivas Plata & Lucking comb. nov., Leucodecton desquamescens (Vain.) Lucking comb. nov., L. oxysporum (Redinger) Lucking comb. nov., Schizotrema cryptotrema (Nyl.) Rivas Plata & Mangold comb. nov., Thelotrema patwardhanii (Hale) Rivas Plata & Mangold comb. nov., Topeliopsis guaiquinimae (Sipman) Rivas Plata & Mangold comb. nov., and T. tuberculifera (Vain.) Rivas Plata & Mangold comb. nov. Using the examples of Fibrillithecis halei s. lat., Leucodecton compunctellum s. lat., and Thelotrema monosporum s. lat., we show how difficult species complexes can be flexibly treated in a key, allowing for either a broad concept or the distinction of several individual taxa.

Molecular data show that Topeliopsis (Ascomycota, Thelotremataceae) is polyphyletic

A phylogenetic study using DNA sequences of the nuclear ribosomal large subunit from 38 species is used to infer the phylogeny of species currently placed in Topeliopsis. The genus is shown to be polyphyletic; monophyly of previous and current circumscriptions of the genus are rejected using two alternative hypothesis tests. Topeliopsis meridiensis is shown to be closer to Chapsa than Topeliopsis, but additional studies are necessary to understand the circumscription of Chapsa. The new genus Melanotopelia Lumbsch & Mangold is described to accommodate T. toensbergii and T. rugosa. These species were previously regarded as aberrant in Topeliopsis because of their thin-walled ascospores and dark pigmented proper exciple. The new combination Graphis mexicana (Hale) Kalb, Lucking & Lumbsch is proposed and Graphis muscicola and Topeliopsis globosa reduced to synonymy with this species.

Species recognition and phylogeny of Thelotrema species in Australia (Ostropales, Ascomycota)

Species circumscriptions based on morphological data are difficult in crustose lichens with limited characters as they often show remarkable variability. An example is the genus Thelotrema s.str., a speciose genus of mostly tropical lichens. Morphological studies on Australian Thelotrema spp. were accompanied by a phylogenetic analysis of mt SSU rDNA sequence data of 19 species, including 25 newly obtained sequences. We performed maximum parsimony and Bayesian phylogenetic analyses of 50 samples, representing 25 species. Our results indicate that more species need to be accepted in Thelotrema than previously thought. Subtle morphological differences were found to be associated with independent lineages in the phylogenetic trees. Furthermore, monophyly of Thelotrema s.str. is strongly supported. On the basis of the corroboration of morphological evidence by molecular data, the new species Thelotrema capetribulense Mangold, T. crespoae Mangold, Lumbsch & Elix, T. oleosum Mangold, and T. pseudosubtile Mangold are described. The new combinations Chapsa phlyctidioides (Mull.Arg.) Mangold and Thelotrema defossum (Mull.Arg.) Mangold are proposed.

Thelotremoid lichen species recently described from Thailand: a re-evaluation

Twenty-six species recently described from Thailand are revised. Eleven taxa are reduced to synonymy with previously described species, including Leptotrema phaeosporum var. vainiona Räsänen. The following new combinations are proposed: Chapsa calathiformis (Vain.) Lumbsch & Papong, C. laemensis (Homchantara & Coppins) Lumbsch & Papong, Melanotrema melanophthalmum (Homchantara & Coppins) Lumbsch & Papong, Ocellularia albocincta (Hale) Divakar & Mangold, O. guianensis (Sipman) Divakar & Mangold, O. khunantensis (Homchantara & Coppins) Lumbsch & Papong, O. percolumellata (Sipman) Divakar & Mangold, O. subcalvescens (Nyl.) Divakar & Mangold and Ocellularia subgranulosa (Homchantara & Coppins) Lumbsch & Papong.

A survey of thelotremoid lichens (Ascomycota: Ostropales) in subantarctic regions excluding Tasmania

Thelotremoid lichens (Ostropales, Ascomycota) with a trentepohlioid photobiont in Tierra del Fuego, the Falkland Islands, the South Island of New Zealand, and subpolar islands of the southern Hemisphere are studied. Twenty-five species are accepted, with three species described as new to science: Melanotopelia blepharostoma Lumbsch & Divakar, Topeliopsis athallina Lumbsch & Mangold and Topeliopsis patagonica Mangold & Lumbsch. The new combination Topeliopsis novae- zelandiae (Szatala) Lumbsch & Mangold is proposed.

Diploschistes elixii ( Ostropales : Thelotremataceae ), an overlooked terricolous species from Western Australia

The new species Diploschistes elixii is described from Western Australia. It is characterized by perithecioid ascomata and large ascospores. It resembles D. hensseniae but is readily distinguished by larger ascospores (up to 45 μm), having lecanoric acid as major constituent, and an epruinose thallus surface. It is currently known from several localities in south-western Australia, where it grows on soil.

The Myriotrema wightii group (Ostropales, Ascomycota) in Australia

Five species of Myriotrema morphologically defined by an epiphloedal, bulging, rather thick thallus, immersed to semi-emergent, perithecioid ascomata with tiny to moderately open ostiola, a whitish- translucent pore region and brown, muriform to submuriform ascospores are accepted in Australia: M. elachistoteron (Leight.) Hale, M. desquamans (Mull.Arg.) Hale, M. phaeosporum (Nyl.) Hale, M. trypaneoides (Nyl.) Hale and M. wightii (Tayl.) Hale. The species are described, their distribution is mapped and a key for their identification is provided. Thelotrema leiospodium Nyl. described from Europe and formerly regarded as a synonym of M. wightii is shown to be a independent species.

Assembling a Taxonomic Monograph of Tribe Wirthiotremateae (Lichenized Ascomycota: Ostropales: Graphidaceae)

Abstract Phylogenetic studies of the lichenized fungal family Graphidaceae necessitate various nomenclatural changes. Tribe Wirthiotremateae is more narrowly circumscribed on the basis of new molecular data and phenotypical differences towards allied clades. The new genus Austrotrema is described to accommodate the three species of the Thelotrema bicinctulum group, Asteristion is resurrected for the seven species of the Chapsa platycarpa group, and Nadvornikia is expanded to include two non-mazaediate species in addition to its two mazaediate species. Asteristion australianum is newly described for Australian material previously identified as T. albo-olivaceum. Eleven new combinations are made: Asteristion alboannuliforme (Bas.: Thelotrema alboannuliforme), As. albo-olivaceum (Bas.: T. albo-olivaceum), As. cupulare (Bas.: T. cupulare), As. leucophthalmum (Bas.: T. leucophthalmum), As. platycarpoides (Bas.: T. platycarpoides), As. platycarpum (Bas.: T. platycarpum), Austrotrema bicinctulum (Bas.: T. bicinctulum), Au. myriocarpum (Bas.: T. myriocarpum), Au. terebrans (Bas.: T. terebrans), Nadvornikia expallescens (Bas.: Leucodecton expallescens), and N. peninsulae (Bas.: Myriotrema peninsulae). Descriptions and discussions of Wirthiotremateae species are provided, along with keys to the species of the tribe. Phylogenetic analyses were based on six markers: the mitochondrial small subunit (mtSSU) and nuclear large subunit (nuLSU) rDNA, RNA polymerase II largest (RPB1) and second largest (RPB2) subunit, elongation factor 1 alpha (EF1-α), and internal transcribed spacer (ITS).

A Worldwide Key to Species of the Genera Myriotrema and Glaucotrema (Lichenized Ascomycota: Graphidaceae), with a Nomenclatural Checklist of Species Published in Myriotrema

Abstract: Lücking, R., Mangold, A. & Lumbsch, H. T. 2016. A worldwide key to species of the genera Myriotrema and Glaucotrema (lichenized Ascomycota: Graphidaceae), with a nomenclatural checklist of species published in Myriotrema. — Herzogia 29: 493–513. A worldwide key to 54 species currently accepted in the genera Myriotrema sensu Frisch (50) and Glaucotrema (4) is presented, including six species with provisional placement in Myriotrema. We also provide a nomenclatural checklist of all 138 names published in Myriotrema and their current status, with the following eleven new combinations being proposed: Myriotrema leucohymenium, M. zollingeri, Ocellularia craterella, O. extendens, O. masonhalei, O. parvidisca, O. pertusarioides, O. squamuloides, Schizotrema flavolucens and Thelotrema configuratum.