Novel taxa of Diatrypaceae from Para rubber (Hevea brasiliensis) in northern Thailand; introducing a novel genus Allocryptovalsa

Abstract

Species of Diatrypaceae are widespread on dead wood of plants worldwide. The delineation of this family is rather problematic because the characters of ascostromata are extremely variable and the names of taxa with sequence data are often misleading. In this paper, species of Diatrypaceae were collected from Para rubber in northern Thailand for examination and illustrations. Based on morphological characteristics and phylogenetic analyses, a new genus, Allocryptovalsa, is introduced to accommodate a new species A. polyspora and two species, A. cryptovalsoidea and A. rabenhorstii are transferred to the new genus. The new species, Diatrypella heveae and Peroneutypa longiasca are also introduced in this paper. Phylogenetic analyses of combined ITS and β-tubulin sequence data show their phylogenetic affinities in Diatrypaceae. Our study also shows that phylogenetic analyses of taxa of Diatrypaceae are highly confused as some genera are shown to be polyphyletic.

WITHDRAWN: The hidden diversity of diatrypaceous fungi in China; introducing Allodiatrypella gen. nov. and ten new species

“…Allocryptovalsa castanea (CFCC 52427, CFCC 52428 and CFCC 52429) formed a distinct strongly supported clade (MP/ML/BI = 99/100/1). Known distribution: Australia, China, Germany, Inidia, Thailand and USA (Saccardo 1882;Trouillas et al 2011;Senwanna et al 2017;Hyde et al 2020a;Konta et al 2020; This study).…”

“…Notes: Allocryptovalsa was introduced and typi ed by A. polyspora from Hevea brasiliensis. The genus is characterized by perithecia immersed in host tissue, polysporous asci and allantoid ascospores (Senwanna et al 2017). This genus comprises another four species (viz.…”

“…1; Clade 14: Allocryptovalsa/Eutypella sensu lato). Allocryptovalsa castanea differs from A. cryptovalsoidea (from Ficus carica), A. elaeidis (from Elaeis guineensis), A. polyspora (from Hevea brasiliensis) and A. rabenhorstii (from Vitis vinifera and Sambuscus nigra) in host association (Saccardo 1882;Trouillas et al 2011;Senwanna et al 2017;Konta et al 2020).…”

“…Notes: The genus Eutypella was established by Saccardo (1875) with E. cerviculata as the type species (Saccardo 1882). Eutypella is characterized by ascostromata erumpent through the host bark by clustered, sulcate perithecial beaks, 8-spored, clavate asci, with long stalks, and allantoid, hyaline or yellowish ascospores (Vasilyeva and Stephenson 2006;Senwanna et al 2017). Eutypella species have been found on a wide range of hosts, especially associated with canker diseases in Vitis vinifera (Vasilyeva and Stephenson 2006;Trouillas et al 2011;Luque et al 2012).…”

“…To clarify the phylogenetic position of our isolates, an analysis based on the combined ITS and tub2 concatenated sequences was performed to compare Diatrypaceae species from the current study with other available species. Reference sequences were selected based on ex-type or ex-epitype sequences available from relevant recently published literature (de Almeida et al 2016;Shang et al 2017Shang et al , 2018Senwanna et al 2017;Hyde et al 2019;Phookamsak et al 2019;Dayarathne et al 2020a, b;Konta et al 2020) (Additional le 1: Table S1). Xylaria hypoxylon (CBS 122620) was selected as the outgroup.…”