Abstract
Twenty seven species of Psathyrella have been found in Northeast China. Amongst them, P. conica, P. jilinensis, P. mycenoides and P. subsingeri are described as new species, based on studying morphological characteristics and phylogenetic analyses. Detailed morphological descriptions, line drawings and photographs of the new species are presented. Phylogenetic analysis of the nuclear ribosomal internal transcribed spacer (ITS) region and an identification key to the 27 Psathyrella species occuring in Northeast China are provided.
Highlights
Psathyrella (Fr.) Quél. is one of the large genera of Agaricales Underw. which consists of 1,030 records in Index Fungorum, comprising approximately 500 species (Smith 1972; Kits van Waveren 1985; Örstadius and Kundsen 2012;)
The phylogenetic tree (Figure 1) shows that all studied materials fall into Psathyrella, with a high statistical support value (BPP=1)
HMJAU 37811; Jingyuetan National Scenic Area, 25 Jun 2017, HMJAU 37914; 7 Jul 2017, HMJAU 37849; Tonghua City, Qiupi Village, 6 Aug 2015, HMJAU 37812, HMJAU 37813; Yunnan Province, Yeya Lake, 7 Aug 2016, HMJAU 37814; 6 Aug 2017, HMJAU 37852; 23 Aug 2017, HMJAU 37962. These phylogenetic results are very much in congruence with the study of Larsson and Örstadius (2008) and Örstadius et al (2015), except /fibrillosa, which separates to two lineages (/fibrillosa I and /fibrillosa II)
Summary
Psathyrella (Fr.) Quél. is one of the large genera of Agaricales Underw. which consists of 1,030 records in Index Fungorum (http://www.indexfungorum.org), comprising approximately 500 species (Smith 1972; Kits van Waveren 1985; Örstadius and Kundsen 2012;). Black brown spore print, always present cheilocystidia and basidiospores smooth or rarely granulose or with myxosporium, fading to greyish in concentrated sulphuric acid (H2SO4) The studies of this genus mainly focused on Europe and North America in recent years (Romagnesi 1952; Smith 1972; Kits van Waveren 1985; Nagy et al 2011; Örstadius and Kundsen 2012; Örstadius et al 2015). In China, 51 names (Psathyrella s.l.) were reported, including four new species (Chiu 1973; Bi et al 1985; Bi et al 1987; Bi 1991; Wang and Bau 2014). 21 species can be found in Northeast China which includes Helongjiang Province, Jinlin Province, Liaoning Province and the northeast of Inner Mongolia Autonomous Region (Wang 2014)
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