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Kerry Knudsen - One of the best experts on this subject based on the ideXlab platform.
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two poorly known species of european Acarospora Acarosporaceae
Herzogia, 2020Co-Authors: Kerry Knudsen, Jana KocourkováAbstract:Knudsen, K. & Kocourkova, J. 2020: Two poorly-known species of European Acarospora (Acarosporaceae). – Herzogia 33:1 – 8. The European species Acarospora franconica and Acarospora helvetica are revised. Acarospora franconica is a lowland species of central Europe collected on sandstone and volcanic rock. It is reported as new for the Czech Republic. Acarospora helvetica is a montane species which occurs on basic and intermediate siliceous rock. Acarospora helvetica was described and reported from Switzerland and France by A. H. Magnusson and is reported new for Austria, Greece, Italy and Germany. Lectotypes are designated for A. austriaca, A. franconica and A. helvetica. Acarospora austriaca is a synonym of A. helvetica.
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the monophyletic sarcogyne canadensis wheeleri clade a newly recognized group sister to the european Acarospora glaucocarpa group
The Bryologist, 2020Co-Authors: Kerry Knudsen, Jana Kocourková, Julia N Adams, Yan Wang, Jericho Ortanez, Jason E StajichAbstract:Molecular phylogenetic analyses of newly generated sequences from North American material belonging to the Acarospora glaucocarpa group recovered these sequences in a previously unrecognized clade sister to European members of the group. North American material is recognized as a distinct clade, named the “Sarcogyne canadensis–wheeleri clade,” and its constituent species are described. Four new calciphytes from North America are described from the clade: S. alcesensis, S. bernardinensis, S. convexa and S. wheeleri. Sarcogyne wheeleri is the taxon North American lichenologists usually identified as A. glaucocarpa. Acarospora canadensis was recovered in the clade and is revised and transferred to Sarcogyne. A neotype is designated for A. glaucocarpa. We transfer S. bolleana, a rare species described from Texas, to Acarospora and do not consider it a synonym of S. arenosa. We do not recognize A. glaucocarpa s.str. as occurring in continental North America. We supply a key to the S. canadensis-wheeleri clade. Currently we report 102 species of Acarosporaceae from North America.
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Acarospora mayrhoferi Acarosporaceae a new species from the european alps italian part and the french massif central
Herzogia, 2018Co-Authors: Kerry Knudsen, Jana KocourkováAbstract:Knudsen K. & Kocourkova J. 2018: Acarospora mayrhoferi (Acarosporaceae), a new species from the European Alps (Italian part) and the French Massif Central. – Herzogia 31: 510–517.Acarospora mayrhoferi is described from the Italian parts of the Alps and from the French Massif Central. It is a lichenicolous lichen, an obligate parasite on Dimeleana oreina, eventually forming its own independent brown thallus of flat black-edged areoles. The simple ascospores are sometimes globose 2 × 2 µm, often broadly ellipsoid 3 × 2µm or ellipsoid 4–5 × 2 µm. The hymenial gel is I+ blue. It belongs to the morphological Acarospora anatolica group. A key is supplied for six similar parasitic species of Acarospora.
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a new species of Acarospora Acarosporaceae Acarosporales lichenized ascomycota from the falkland islands islas malvinas
Phytotaxa, 2018Co-Authors: Dag Olav Ovstedal, Kerry Knudsen, Louise Lindblom, Alan M FrydayAbstract:Acarospora malouina Ovstedal & K. Knudsen is described from the Falkland Islands. It is morphologically very similar to the Antarctic species A. gwynnii but differs in chemistry, ecology and evidence from molecular data.
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a new species of the Acarospora strigata group Acarosporaceae from china
The Bryologist, 2017Co-Authors: Lazzat Nurtai, Kerry Knudsen, Abdulla AbbasAbstract:Abstract The Acarospora strigata group is distinguished by a common phenotype of heavily pruinose areoles with deep fissures cleaving the cortex. It occurs from South and North America through Asia to Africa and Europe. One new species is described from China in Xinjiang in central Asia: Acarospora tianshanica, which produces gyrophoric acid. Acarospora interrupta is lectotypified and reported new from China. In addition, a key is supplied to the nine species currently recognized in the Acarospora strigata group.
Saarela Jeffery - One of the best experts on this subject based on the ideXlab platform.
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Figure 7f from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7f - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Trebouxia sp. 2 with hyphae of Lecanora cf. garovaglii
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Figure 7e from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7e - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Squash showing single cells with a solid chloroplast and thin cell walls
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Figure 7c from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7c - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Cultured cells showing larger size, single cells and colony with pie-shaped cells
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Figure 7d from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7d - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Colonial form within the lichen, cells with flattened plate-like chloroplast and thick cell walls
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Figure 7b from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7b - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Chloroplast poorly discoid or a flattened plate. Pyrenoid present in a few cells. Cell wall up to 1 μm in thickness
Sokoloff Paul - One of the best experts on this subject based on the ideXlab platform.
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Figure 7f from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7f - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Trebouxia sp. 2 with hyphae of Lecanora cf. garovaglii
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Figure 7e from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7e - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Squash showing single cells with a solid chloroplast and thin cell walls
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Figure 7c from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7c - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Cultured cells showing larger size, single cells and colony with pie-shaped cells
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Figure 7d from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7d - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Colonial form within the lichen, cells with flattened plate-like chloroplast and thick cell walls
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Figure 7b from: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. ht
2016Co-Authors: Sokoloff Paul, Freebury Colin, Hamilton Paul, Saarela JefferyAbstract:Figure 7b - Photobionts (algae). a-d: Trebouxia sp. 2 within Acarospora strigata. e-f: Trebouxia sp. 2 within Lecanora cf. garovaglii. Scale bar = 20 μm. Photos by P.B. Hamilton. Chloroplast poorly discoid or a flattened plate. Pyrenoid present in a few cells. Cell wall up to 1 μm in thickness
Emma M Newton - One of the best experts on this subject based on the ideXlab platform.
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a novel miniature confocal microscope raman spectrometer system for biomolecular analysis on future mars missions after antarctic trials
Journal of Raman Spectroscopy, 2000Co-Authors: David L Dickensheets, Howell G M Edwards, David D Wynnwilliams, Christian Schoen, Chelle Crowder, Emma M NewtonAbstract:Biomolecules, such as the productive and protective pigments of photosynthetic organisms, are good biomarkers in extreme Antarctic deserts as analogues of early Mars. Laser Raman technology at long wavelengths which minimize fluorescence is ideal for remote analysis of biomolecules in situ. We report Raman spectra obtained with a prototype miniature laser-Raman spectrometer/confocal microscope (specification < 1 kg) under development for a Mars lander and evaluation in Antarctic deserts. We compare the efficiency of its 852 nm laser/CCD detector system with an optimal bench-top 1064 nm FT Raman spectrometer which excels with biomolecules. Using a yellow Antarctic lichen, Acarospora chlorophana, we show good correlation between both instruments restricted to the 460–1350 cm−1 wavenumber range.
Martin Westberg - One of the best experts on this subject based on the ideXlab platform.
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Phylogeny of the Acarosporaceae (Lecanoromycetes, Ascomycota, Fungi) and the evolution of carbonized ascomata
Fungal Diversity, 2015Co-Authors: Martin Westberg, Kerry Knudsen, Ana M. Millanes, Mats WedinAbstract:The phylogeny of the Acarosporaceae (Lecanoromycetes, Acarosporomycetidae, Acarosporales) is investigated using data from three molecular markers; nuclear ITS-LSU rDNA, mitochondrial SSU and β-tubulin. Acarosporaceae is shown to be constituted by six main clades; Myriospora , Timdalia , Pleopsidium , a clade composed by “ Acarospora” rhizobola and “A.” terricola , the poorly supported Sarcogyne clade (including several Polysporina and Acarospora species) and the Acarospora clade (including the type of Polysporina , P. simplex , and several other Polysporina species). The common ancestor of the Acarosporaceae did not produce strongly black pigmented (carbonized or melanized) ascomata, but this trait has arisen secondarily and independently numerous times in the evolution of the group. The number of changes in character states of both carbonized epihymenium and carbonized exciple are considerably more than the minimum number. The genera Sarcogyne and Polysporina —largely circumscribed based on the presence of black pigmented ascomata—are shown to be distinctly non-monophyletic. The presence of green algae in the ascoma margin (lecanorine or lecideine ascomata) may vary even within single species.
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2341 proposal to conserve the name lichen fuscatus scgrad Acarospora fuscata against l fuscatus lam with a conserved type lichenised ascomycota Acarosporaceae
Taxon, 2015Co-Authors: Linda In Arcadia, Kerry Knudsen, Martin WestbergAbstract:(2341) Proposal to conserve the name Lichen fuscatus Scgrad. (Acarospora fuscata) against L. fuscatus Lam. with a conserved type (lichenised Ascomycota: Acarosporaceae)
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Silobia, a new genus for the Acarospora smaragdula complex (Ascomycota, Acarosporales) and a revision of the group in Sweden
The Lichenologist, 2010Co-Authors: Martin Westberg, Anna T. Crewe, O. William Purvis, Mats WedinAbstract:The new genus Silobia M. Westb. & Wedin is proposed for the Acarospora smaragdula group, which is taxonomically and nomenclaturally revised in Sweden. The proposed taxonomy results from our former molecular phylogeny, together with morphological and anatomical investigations and analysis of secondary metabolites. Seven species are recognized in Sweden in this paper: Silobia dilatata sp. nov., S. myochroa sp. nov., S. rhagadiza comb. nov., S. rufescens comb. nov., S. scabrida comb. nov., S. smaragdula comb. nov. and S. tangerina sp. nov. Acarospora alberti, A. amphibola, A. isortoquensis, A. murina and A. undata are recognized as synonyms of S. smaragdula, Acarospora verruciformis as a synonym of S. scabrida and A. scyphulifera as a synonym of S. rhagadiza. The following names are lectotypified: Acarospora amphibola, A. amphibola f. testacea, A. lesdainii, A. lesdainii var. subochracea, A. murina, A. scyphulifera f. subdiscreta, Endocarpon smaragdulum, Lecanora rhagadiza and Sagedia rufescens. Acarospora scyphulifera is neotypified. Acarospora fusca is excluded from the Swedish checklist as the specimen was found to belong to S. rufescens. A key to the species is presented.
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Acarospora rosulata in europe north america and asia
Lichenologist, 2010Co-Authors: Kerry Knudsen, Martin Westberg, Valerie Reeb, Rithu Srikantha, Debashish BhattacharyaAbstract:Acarospora rosulata is revised and reported from North America and Mongolia. Acarospora bullata is not verified as occurring in South and North America and may be conspecific with A. rugulosa.
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species delimitation and evolution of metal bioaccumulation in the lichenized Acarospora smaragdula ascomycota fungi complex
Cladistics, 2009Co-Authors: Mats Wedin, Martin Westberg, Anna T. Crewe, Anders Tehler, William O PurvisAbstract:The crustose lichenized fungi in the Acarosporaceae are splendid examples of organisms managing to survive in extremely harsh environments, such as highly mineralized rocks and low-pH habitats. Som ...
