Halodiatrype Dayarathne & K.D.Hyde, 2016

Dayarathne, Monika C., Wanasinghe, Dhanushka N., Devadatha, B., Abeywickrama, Pranami, G, E. B., Jones, areth, Chomnunti, Putarak, Sarma, V. V., Hyde, Kevin D., Lumyong, Saisamorn, C., Eric H. & Mckenzie, 2020, Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K. D. Hyde, gen. nov., Cryptogamie, Mycologie 20 (3), pp. 21-67 : 52

Halodiatrype Dayarathne & K.D.Hyde

Mycosphere 7 (5): 612-627 (2016).

TYPE SPECIES. — Halodiatrype salinicola Dayarathne & K.D.Hyde , in Mycosphere 7 (5): 612-627 (2016).

DESCRIPTION

Sexual morph

See Dayarathne et al. (2016).

Asexual morph

(on PDA after 60 d at 25°C) libertella-like, in black conidial drops. Conidia falcate, hyaline, 1-celled, smooth, upper end subacute, base truncate, curved to nearly semicircular.

NOTES

Halodiatrype was introduced by Dayarathne et al. (2016) and is significantly different to other genera in this family by having ascomata lacking stromatal tissues,comparatively large ascospores with septa and a libertella-like asexual morph. Generally, Diatrypaceae species have well-developed ascostromata with aseptate ascospores ( Maharachchikumbura et al. 2015). In our phylogenetic analyses, species belonging to this genus formed a well-separated (75% ML, 0.92 PP) clade (clade B) along with the marine genus Pedumispora . Halodiatrype formed a well-separated (99% ML,90% MP,1.00PP) clade within Diatrypaceae ( Fig. 1 ) supported by ITS phylogenetic data ( Fig. 2 ). This study is the first report of an asexual morph for this genus from an axenic culture of Halodiatrype avicenniae .

Figures

FIG. 1. — Phylogram generated from the best scoring RAxML tree based on combined ITS and Btub sequence data. Bootstrap support values for maximum likelihood (ML,black) and maximum parsimony (MP, blue) equal or greater than 60 % are given above the nodes. Bayesian posterior probabilities (PP,green) equal or greater than 0.90 are shown above the branch. The tree is rooted to Xylaria hypoxylon (CBS 122620) and Kretzschmaria deusta (CBS 826.72). All sequences from ex-type strains are in bold. Symbols:, polysporous species;, octosporous species;, species with less than eight spores. Scale bar: 0.2 (expected number of nucleotide substitutions per site per branch).

FIG. 2. — Phylogram generated from the best scoring RAxML tree based on ITS sequence data. Bootstrap support values for maximum likelihood (ML, black) and maximum parsimony (MP, blue) equal or greater than 60% are given above the nodes. Bayesian posterior probabilities (PP,green) equal or greater than 0.90 are shown above the branch. The tree is rooted to Xylaria hypoxylon (CBS 122620) and Kretzschmaria deusta (CBS 826.72). Scale bar: 0.09 (expected number of nucleotide substitutions per site per branch).