New species in Dictyosporium, new combinations in Dictyocheirospora and an updated backbone tree for Dictyosporiaceae

Abstract

A survey of freshwater fungi on submerged wood in China and Thailand resulted in the collection of three species in Dictyocheirospora and four species in Dictyosporium including two new species in the latter genus. Morphological characters and phylogenetic analyses based on ITS, LSU and TEF1α sequence data support their placement in Dictyocheirospora and Dictyosporium (Dictyosporiaceae). An updated backbone tree is provided for the family Dictyosporiaceae. Descriptions and illustrations of the new taxa and re-collections are provided. Four new combinations are proposed for Dictyocheirospora.

Phylogenetic placement of Leptosphaeria polylepidis, a pathogen of Andean endemic Polylepis tarapacana, and its newly discovered mycoparasite Sajamaea mycophila gen. et sp. nov.

“…The phylogenetic tree shows 11 monophyletic lineages of the Dictyosporiaceae, corresponding to 10 known genera and one unknown lineage, the latter of which consisted of the conidiomatal fungus from Leptosphaeria polylepidis. Results were roughly consistent with previous phylogenetic results (e.g., Iturrieta-González et al 2018;Yang et al 2018), except for some differences in branches with low statistical support values mainly at the backbone of the phylogenetic tree. The sequences of the conidiomatal fungus from two independent extraction rounds were identical and of high quality, excluding the possibility of DNA isolation from contaminating fungi, and were nested within the currently circumscribed family Dictyosporiaceae (ML-BP = 100%, PP = 1).…”

“…Each single gene dataset was aligned separately using the MAFFT algorithm (Katoh et al 2005) as implemented on the GUIDANCE web-server (Penn et al 2010); to remove poorly or ambiguously aligned uncertain columns, a default cut-off score of 0.93 in all single gene alignments were chosen. The single-gene datasets were concatenated to a final alignment using Geneious Pro and consisted of 1023 bp (SSU), 452 bp (ITS), 1326 bp (LSU), To resolve phylogenetic position of the conidiomatal fungus, a two-gene dataset (ITS+LSU) was assembled, which contained sequences generated in this study and sequences from 28 related members of the Dictyosporiaceae and two sequences of Periconia igniaria used as an outgroup (selected from Iturrieta- González et al 2018 andYang et al 2018; see Table 2). Phylogenetic analyses were performed as described above and were based on 820 bp (LSU) and 412 bp (ITS) alignments.…”

Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa

“…Notes: Corda (1836) introduced Dictyosporium based on the type D. elegans Corda. The sexual morph of Dictyosporium species is characterised by subglobose ascomata, bitunicate cylindrical asci, and hyaline, fusiform, uniseptate ascospores with or without a sheath, while the asexual morph is characterised by micronematous to macronematous conidiophores and cheiroid, digitate complanate conidia with several parallel rows of cells (Goh et al 1999;Boonmee et al 2016;Yang et al 2018a). Dictyosporium species have a worldwide distribution and have been reported from both terrestrial and aquatic habitats (Goh et al 1999;Tanaka et al 2015;Boonmee et al 2016;Yang et al 2018a).…”

Five Novel Freshwater Ascomycetes Indicate High Undiscovered Diversity in Lotic Habitats in Thailand

“…Two new freshwater Dothideomycetes, Camposporium dulciaquae and Brunneofusispora hyalina, add to the increasing number of pleosporalean taxa discovered from freshwater habitats in Thailand. Based on the published works from 2015-2020, 40 novel pleosporolean taxa were discovered: Aigialaceae (1 species) [93], Anteagloniaceae (1 species) [14], Astrosphaeriellaceae (2 species) [14], Dictyosporiaceae (7 species) [14,[94][95][96][97], Latoruaceae (2 species) [14,98], Lentitheciaceae (4 species) [20,99,100], Ligninsphaeriaceae (1 species) [15], Lindgomycetaceae (3 species) [14,101], Longipedicellataceae (3 species) [14], Lophiostomataceae (1 species) [14], Melanommataceae (1 species) [97], Morosphaeriaceae (3 species) [14,102], Nigrogranaceae (1 species) [14], Occultibambusaceae (1 species) [103], Parabambusicolaceae (1 species) [14], Phaeosphaeriaceae (1 species) [104], Pleosporales genera insertae sedis (2 species) [11,14], Pseudoastrosphaeriellaceae (1 species) [14], Tetraplosphaeriaceae (1 species) [14], Trematosphaeriaceae (1 species) [97], and Wicklowiaceae (2 species) [19,24]. Camposporium thailandicum is an addition to the known twelve Camposporium species recorded in freshwater habitats: C. antennatum [105][106][107], C. appendiculatum [27], C. cambrense [108][10...…”