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The new corticolous lichen fungus Platythecium seychellense is described from the Seychelles. Morphological characters as well as distribution and resemblance to related species are discussed. The species is characterized by a crustose, grey-green, smooth thallus lacking lichen substances, elongate and slender apothecia having flat, red-brown discs...
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Context 1
... and distribution. Mountain forest, on smooth bark of trees. The specimens were found close to the summit of Morne Blanc which is located within the Morne Seychellois National Park (Fig. 3). In the lower forest of Morne Blanc two typical higher plants of the Seychelles (Pandanus seychellarum and P. hornei) are present. Platythecium seychellense grows on smooth bark of trees higher up the mountain, which is covered by a nearly impenetrable misty rainforest of which Roscheria melanochaetes (endemic palm tree, Arecaceae) and ...
Context 2
... of Graz herbarium (GZU), Walter Obermayer, is thanked for providing some speci- mens of Platythecium for comparison. Specimens were collected using a research and collection permit from the Seychelles Bureau of Standards, issued by Elvis Nicette (managed by Katy Beaver, Conservation Action Group) and for providing the photograph used in Fig. ...
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Two new genera are proposed: Ellismarsporium for species of Helminthosporium and Corynesporella that have catenate conidia and polytretic conidiogenous cells, and Stanhughesiella for a species of Helminthosporium with dictyoseptate conidia. Descriptions and illustrations are provided.
The genus Cyanopenthe Nikitsky, 1998 is first recorded from mainland China. Two new species, C. granulatasp. nov. and C. hirtiscutellarasp. nov. , are described and illustrated. This genus is redefined, and an updated key to the known species is presented.
Citations
... With increasing knowledge and available material, it became clear, however, that Redinger's pioneering work covered less than half of the actual diversity. Major modern contributions were provided, e.g., by Staiger (2002), Frisch & Kalb (2006), Lücking et al. (2009, 2016), Rivas Plata et al. (2010, Sipman et al. (2012), Lücking (2014), Feuerstein et al. (2014Feuerstein et al. ( , 2022a, and Neuwirth et al. (2017). The high diversity was accentuated by the description of many new species from a two-week field trip to Rondônia in 2012 ). ...
We describe 14 new lichen species in the family Graphidaceae, mainly from the Amazon basin: Acanthothecis aggregata, Allographa ancelina, A. apicalinspersa, Chapsa constrictospora, C. diorygmoides, C. lichexanthonica, Clandestinotrema caloplacosporum, Diorygma defectoisidiatum, D. gyrosum, D. lichexanthonicum, D. norsubmuriforme, D. salxanthonicum, D. toensbergianum, and Ocellularia flavoradiata. For each species, it is indicated where and how it would key out in a recent identification key. Two of the Diorygma species are sterile and were assigned to this genus by sequencing the mtSSU gene. Five additional species are new to Brazil and 27 others, including some Gomphillaceae, are new state records.
... ( Fig. 7B) Remarks. The only specimen of Platythecium we have seen from South Africa could not be determined to species because mature spores were not seen and none of the TLC spots could be positively identified; secondary chemistry is important for species determination in this genus (Neuwirth et al. 2017). We include it here because this genus has not otherwise been reported from South Africa. ...
Additions and corrections are provided for the South African species of Graphidaceae tribe Graphideae with hyaline ascospores. Allographa oldayana I. Medeiros sp. nov. is described as new to science based on morphological, chemical and molecular data. The new species is characterized by lirellae with striate labia and a complete thalline margin, a completely carbonized excipulum, large, muriform ascospores, and the presence of hirtifructic acid. Allographa consanguinea (Müll. Arg.) Lücking, A. leptospora (Vain.) Lücking & Kalb, Diorygma aff. minisporum Kalb et al ., Graphis crebra Vain., Gr. dupaxana Vain., Gr. furcata Fée, Gr. handelii Zahlbr., Gr. longula Kremp., Gr. pinicola Zahlbr., Gr. proserpens Vain, Gr. subhiascens (Müll. Arg.) Lücking and Platythecium sp. are reported as new records for South Africa. Allographa striatula (Ach.) Lücking & Kalb, Graphis analoga Nyl. and Gr. scripta (L.) Ach. are shown to be misapplied names that should be removed from the South African checklist. The new combination Mangoldia bylii (Vain.) I. Medeiros comb. nov. (bas. Graphis bylii Vain) is made; this represents an earlier name for M. atronitens (A. W. Archer) Lücking et al . Taxonomic notes are provided for Graphis bylii var. lividula Vain. and Gr. denudans Vain., species that are known only from their South African holotypes. Phylogenetic analyses that include new DNA sequence data from the nrLSU, mtSSU and RPB 2 loci confirm the generic placements of several species for which molecular data were lacking: Allographa consanguinea , Glyphis atrofusca (Müll. Arg.) Lücking, Graphis crebra and Gr . subhiascens .
A key to the identification of the 258 genera of lichenized fungi in Thailand is presented. Species names are provided for genera for which only a single species has been recorded for Thailand. Recent available keys that include all species known from Thailand are referenced. The replacement name Ionaspis aptrootii is proposed for I. tropica Aptroot (non Riddle).
