Abstract
During an investigation of the diversity of aquatic hyphomycetes from southern China, two interesting isolates were collected. These two isolates were cultured and sequenced, and a BLAST search of their LSU sequences against data in GenBank revealed that the closest related taxa were in the genus Microthyrium. Phylogenetic analyses, based on the combined sequence data from the internal transcribed spacer (ITS) and large nuclear subunit ribosomal DNA (LSU), revealed that our isolates belong to the Microthyriaceae. Combined morphological characters allowed us to describe our isolates as two new genera and species in Microthyriaceae, named as: Keqinzhangia aquatica and Pseudocoronospora hainanense. The full descriptions, illustrations, and a phylogenetic tree showing the position of the two new genera were provided in this paper.
Highlights
Microthyriales was introduced by Arnaud in 1918, with type family Microthyriaceae (Arnaud 1918)
The combined analysis of the two loci (ITS and large subunits ribosomal DNA (LSU)), which was analyzed by Bayesian inference (BI) and maximum likelihood (ML) approaches, confirmed the status of our isolates in the family Microthyriaceae
YMF 1.04626 was clustered together with the sexual genus Microthyrium with good support (MLBP/Bayesian inference posterior probability (BIPP) = 92%/1.0), and the clade was close to the asexual genus Neoanungitea Crous
Summary
Microthyriales was introduced by Arnaud in 1918, with type family Microthyriaceae (Arnaud 1918). Hongsanan and Hyde (2017) excluded Micropeltidaceae from Microthyriales based on their phylogenetic analyses and morphological characteristics. Until 2011, Wu et al (2011) reappraised the Microthyriaceae based on examinations of generic types and provided sequence data of several species. They accepted seven sexual genera in the Microthyriaceae. Hongsanan et al (Hongsanan et al 2020) accepted 11 genera in this family based on morphology and phylogeny, including 8 sexual genera and three asexual genera, besides, they added definition of asexual morph in family level
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
