ABL Herbarium

Soest, Netherlands

ABL Herbarium

Soest, Netherlands
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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 | Sipman H.J.M.,Free University of Berlin | Caceres M.E.D.S.,Federal University of Sergipe
Lichenologist | Year: 2013

Abstract Twenty-three species of Pyrenula from Latin America are treated here. Several species show characters that were not previously reported in the genus and are rare or new to lichenized fungi, viz. yellow, orange or red (KOH+ green) oil inspersion in the hymenium, yellow oil in young ascospores or longitudinal ridges on the ascospore wall. Two taxonomically significant types of over-mature spores are illustrated. The following new species are described: Pyrenula aggregataspistea Aptroot & M. Cáceres, P. aurantioinspersa Aptroot & Sipman, P. cornutispora Aptroot & M. Cáceres, P. flavoinspersa Aptroot & Sipman, P. guyanensis Sipman & Aptroot, P. infraleucotrypa Aptroot & M. Cáceres, P. inframamillana Aptroot & M. Cáceres, P. infrastroidea Aptroot & Sipman, P. maritima Sipman & Aptroot, P. mattickiana Sipman & Aptroot, P. minoides Aptroot & Sipman, P. monospora Aptroot & Sipman, P. paraminarum Aptroot & M. Cáceres, P. perfecta Aptroot & Sipman, P. plicata Sipman & Aptroot, P. rubroinspersa Aptroot & Sipman, P. rubronitidula Aptroot & M. Cáceres, P. rubrostigma Aptroot & M. Cáceres, P. tetraspora Aptroot & Sipman, P. triangularis Aptroot & Sipman, P. viridipyrgilla Aptroot & M. Cáceres. Pyrenula seminuda (Müll. Arg.) Sipman & Aptroot is a new combination. Copyright © British Lichen Society 2013.


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.


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
Phytotaxa | Year: 2014

Two new species of Graphidaceae are described from the Solomon Islands. Fissurina longiisidiata occurs on tree bark in lowland forests and is characterized by the presence of long cylindrical, glossy green isidia and 3-septate ascospores. Pseudoramonia isidiata occurs on dead leaves in mountain forest and is characterized by the presence of gnarled, somewhat tapering, whitish grey isidia and 7-septate, somewhat clavate ascospores. © 2014 Magnolia Press.


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.


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

The new species Bacidia termitophila, Coenogonium coppinsii, Fellhanera termitophila, and Micarea termitophila are described from termite nests in rainforest in Rondônia and adjacent Amazonas. Lichens were found on termite mounds on the ground but most of the species were also found on termite nests on trees. This substratum may serve as the most important locality for terricolous lichens in rainforests, and the natural habitat for species known mostly from road banks. © British Lichen Society 2014.


Aptroot A.,ABL Herbarium | Caceres M.E.D.S.,Federal University of Sergipe
Lichenologist | Year: 2013

The following new species of pyrenocarpous lichens are described from Rondônia: Agonimia tenuiloba: corticolous, thallus with minute flabellate lobes developing goniocysts; ascomata smooth, grey, ellipsoidal; ascospores densely muriform, 30-50(-76)×20-35 m. Anisomeridium lateriticum: saxicolous; conidiomata sessile, pyriform, ostiole with brown and hyaline septate setae; conidia simple to 1-septate, 8-11×2·0-2·5 m. Anisomeridium triseptatum: corticolous, ascomata with lateral ostioles; ascospores (1-)3-septate, 25-30×7·5-10·0 m, often with gelatinous appendages. Mycomicrothelia megaspora: ascospores ornamented, 1-septate, (27-)29-35(-40)×8-12 m, often with a gelatinous layer 6-15 m thick. Porina linearispora: corticolous; thallus green, shiny; ascomata immersed, 0·2-0·3 mm; ascospores filiform, (7-)9(-13)-septate, 75-90×1·5-2·0 m. Porina maxispora: corticolous; thallus green, matt; ascomata immersed, 0·5-0·7 mm; ascospores filiform, (17-)23-35-septate, 95-110×4·5-5·5 m. Porina novemseptatoides: saxicolous; thallus very thin, brown, glossy; ascomata superficial, 0·1-0·2 mm; ascospores fusiform, (7-)9-septate, 21-24×4·5-5·0 m, with a c. 5 m thick gelatinous layer. Porina termitophila: terricolous; thallus greyish green; ascomata emergent, 0·15-0·20 mm; ascospores fusiform, 1-3-septate, 13-15×2·5-3·0 m. Pyrenula bispora: corticolous, thallus whitish, ascomata dispersed; hamathecium inspersed; ascospores 2 per ascus, muriform, 55-75×19-23 m. Pyrenula leptaleoides: corticolous; thallus green to pale brown; ascomata deeply immersed in bark, with long necks fused in joint ostioles visible as brown dots on the surface; ascospores 23-27×8-11 m, with rather angular lumina. Pyrenula rhomboidea: corticolous; thallus olive-brown; ascomata single, immersed; ascospores irregularly uniseriate, clavate-rhomboidal, 11-13×3·5-4·0 m. A key is provided to all species of pyrenocarpous lichens (except Trypetheliaceae) found in Rondônia. Nearly all species are new reports for Rondônia. Aspidothelium glabrum, Pyrenula leucotrypa and P. micheneri are newly reported for South America. The usually foliicolous Strigula nitidula is reported for the first time from bark. The high lichen diversity is explained by the poor soils, supporting an only moderately dense forest where enough light can reach the tree trunks at ground level to support a rich flora of crustose lichens usually confined to the upper trunks. Copyright © British Lichen Society 2013.


A refined species concept is applied in the tropical corticolous lichen genus Polymeridium (Trypetheliaceae). While up to now many species were considered to be variable in phenotypical characters, such as hamathecium inspersion and/or presence of lichexanthone, these characters are here accepted as species-specific characters. This classification is in line with the taxonomy in other groups of lichenized fungi. The monotypic genus Exiliseptum is included here in Polymeridium, as it differs in only one character from several species of Polymeridium and has no unique characters. The number of accepted species is thus raised from 27 to 53, including 13 new species, viz.: Polymeridium albidoreagens, P. albidovarians, P. alboflavescens, P. catapastoides, P. costaricense, P. inspersum, P. multiforme, P. multiseptatum, P. neuwirthii, P. pyrenastroides, P. submuriforme, P. tribulationis, and P. xanthoreagens. The following new combinations are proposed: Polymeridium albopruinosum, P. amylosporum, P. bengoanum, P. brachysporum, P. jordanii, P. microsporum, P. ocellatum, P. refertum, P. siamense, P. stramineoatrum, P. subvirescens, and P. suffusum. An identification key is provided to all accepted species. © 2013 J. Cramer in Gebr. Borntraeger Verlagsbuchhandlung, Stuttgart, Germany.

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