The genus Marasmius (Basidiomycota, Agaricales, Marasmiaceae) from Republic of São Tomé and Príncipe, West Africa

Abstract

This treatise serves as a preliminary monograph and phylogenetic treatment of Marasmius from the African island nation of São Tomé and Príncipe (ST&P), based on data generated from 30 specimens collected in 2008. Twenty-one species are described, seven of which represent species new to science (Marasmius albisubiculosus, M. diversus, M. elaeocephaliformis, M. laranja, M. leptocephalus, M. paratrichotus, M. segregatus), and all represent new distribution records for ST&P. Species are delimited based on comprehensive morphological characters and DNA sequence data. Prior to the collection of these specimens, only one Marasmius species had been documented from these islands. Phylogenetic hypotheses generated from analyses of DNA sequences of the Internal Transcribed Spacer regions (ITS1+5.8S+ITS2) are proposed to explore the evolutionary relationships amongst ST&P Marasmius and global Marasmius diversity. A dichotomous key to aid in identification, illustrations of pertinent micromorphological features, colour photographs of basidiomata, comprehensive descriptions and commentaries are provided.

A morphological and phylogenetic evaluation of Marasmius sect. Globulares (Globulares-Sicci complex) with nine new taxa from the Neotropical Atlantic Forest

“…Distribution — Originally described from Thailand ( Wannathes et al 2009 ) and also found in Príncipe ( Grace et al 2019 ), it is herein recorded for the first time from Brazil.…”

“…1b–c, e , 2 ), showing multiple emergence considering the traditional sectional pattern (only Globulares -type cells in the pileipellis) across the entire section that is also in agreement with previous studies ( Tan et al 2009 , Wannathes et al 2009 ). Unfortunately, the data published by Shay et al (2017) and Grace et al (2019) were not included in this analysis.…”

Corrigendum to: Marasmius australotrichotus (Marasmiaceae), a new setose species from Australia, and an intriguing range extension for M. paratrichotus

“…Background. Marasmius paratrichotus was described from the west African island nation of São Tomé and Príncipe (ST&P) by Grace et al (2019). It forms a sister clade to M. trichotus (Figure 2) described from Singapore by Corner (1996).…”

“…However, the remoteness of its tropical distribution means little survey effort has been made in other likely habitats. The addition of two collections (GenBank ON715786 & OQ725928) that are >99% similar to the ST&P collection, (GenBank KX953749 Grace et al 2019), in the nrITS region is important in confirming the validity of the species as distinct from M. trichotus. Marasmius paratrichotus is morphologically similar to M. trichotus, which has an Asian and Oceania distribution including Thailand (Wannathes et al 2009) and Papua New Guinea (Desjardin & Horak 1997).…”

“…Other species in ser. Spinulosi sensu Singer have been reported from Africa (Shay et al 2017;Grace et al 2019), south-east Asia (Tan et al 2009;Wannathes et al 2009), Korea (Antonín et al 2012), Far-eastern Russia (Kiyashko et al 2014) and Argentina (Niveiro et al 2018). These vary in the presence of pleurocystidia, being present in many but absent in others, e.g., the 'trichotus' group.…”