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Soest, Netherlands

Weerakoon G.,Field Museum | Aptroot A.,ABL Herbarium
Cryptogamie, Mycologie | Year: 2014

Two hundred and seven lichen species are newly reported from Sri Lanka, eight of which were previously thought to be endemic in India; 91 species are new to the Indian subcontinent, and four to Asia, and three are described here as new to science: Astrothelium nitidulum which has 7-septate ascospores with diamond-shaped lumina, mostly simple ascomata in shiny olive pseudostromata and an inspersed hamathecium; Heterodermia queensberryi which is similar to Heterodermia propagulifera but with a corona of lobules around the apothecia; and Malmidea papillosa, which is similar to Malmidea granifera but has regular warts and lacks medulla in the excipulum. © 2014 Adac. Tous droits réservés.


Aptroot A.,ABL Herbarium
Lichenologist | Year: 2012

An identification key is presented for the accepted species of the lichen genera Anthracothecium (comprising 5 species) and Pyrenula (with 169 species, including 7 still undescribed). The key also contains some similar taxa and is complete for Blastodesmia (1 species), Sulcopyrenula (4 species), and Eopyrenula (6 species), but not for others such as Aptrootia, Architrypethelium, and Lithothelium, of which only the corticolous brown-spored taxa are treated. The following new combinations were found to be necessary: Anthracothecium interlatens (Nyl.) Aptroot, Pyrenula breutelii (Müll. Arg.) Aptroot, Pyrenula ceylonensis (Ajay Singh & Upreti) Aptroot, Pyrenula fusispora (Malme) Aptroot, Pyrenula gibberulosa (Vain.) Aptroot, Pyrenula lyoni (Zahlbr.) Aptroot, Pyrenula papillifera (Nyl.) Aptroot, Pyrenula platystoma (Müll. Arg.) Aptroot, Pyrenula schiffneri (Zahlbr.) Aptroot, Pyrenula welwitschii (Upreti & Ajay Singh) Aptroot, and Sulcopyrenula subglobosa (Riddle) Aptroot. Pyrenula sexluminata Aptroot is a new name for Pyrenula quinqueseptata Aptroot, and Pyrenula neosandwicensis Aptroot is a new name for Anthracothecium sandwicense Zahlbr. In addition, all known and many novel synonyms are cited, and the disposition of all other taxa in the two genera Anthracothecium (with 155 names) and Pyrenula (with 745 names) and their generic synonyms. Bogoriella was found to be an older name for Mycomicrothelia. © Copyright British Lichen Society 2011.


Weerakoon G.,Field Museum | Aptroot A.,ABL Herbarium
Cryptogamie, Mycologie | Year: 2013

The following new species are decribed from Sri Lanka: Heterodermia rubrotricha which is similar to Heterodermia leucomela but with red, K + purple pigment on the cilia. Malmidea sanguineostigma, which is similar to Malmidea chrysostigma but has red anthraquinone in the thallus medulla, yellow xantholepinone in the excipulum medulla and smaller ascospores. Protoparmelia megalosporoides which is unique in the genus by the lecideine apothecia resembling those of Megalospora. A key to the species of Heterodermia in Sri Lanka is provided, applying a chemically and morphologically strict species concept. © 2013 Adac. Tous droits réservés.


Aptroot A.,ABL Herbarium
Lichenologist | Year: 2012

The new species Fellhaneropsis rhododendri is described from living Rhododendron leaves in the Netherlands. It is characterized by pyriform pycnidia with stiff, septate hairs at the mouth. It is doubtlessly due to recent global warming that an obligately foliicolous lichen can be described from a temperate area in Europe. © 2012 British Lichen Society.


Caceres M.E.D.S.,Federal University of Sergipe | Aptroot A.,ABL Herbarium | Ertz D.,National Botanic Garden of Belgium
Lichenologist | Year: 2014

The following new species of Arthoniales are described from Rondônia: Alyxoria fuscospora with 3-septate clavate ascospores of 20-23×4·5-5·5 μm having a gelatinous layer soon appearing evenly brown (also known from other tropical countries). Chiodecton complexum with discrete soralia, immersed apothecia in branched lines and 3-septate ascospores (26-)33-40×2·5-3·5 μm. Coniarthonia rosea, similar to C. pulcherrima but with the apothecia pink and more irregular in outline and the ascospores 13-16×5·5-6·5 μm. Cresponea flavosorediata with yellow-olive soralia, apothecia with yellow pruina and 7-9-septate ascospores, 26-38(-50)×5·0-6·5 μm. Cresponea lichenicola, lichenicolous on a Pyrenula, with 0·1-0·3 mm wide apothecia with yellow pruina. Eremothecella helicella with helicoid curved c. 17-29-septate conidia c. 70-95×2 μm long if uncoiled, with septa 3-6 μm apart. The Arthoniales are a speciose component of the lowland rainforest of Rondônia. A key is provided to the corticolous species of most groups of Arthoniales found in Rondônia. The foliicolous species found so far are listed. Most are new records for Rondônia. Chrysothrix occidentalis is new to the Neotropics. © 2014 British Lichen Society.

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