Halocryptovalsa avicenniae (Abdel-Wahab, Bahkali & E.B.G.Jones) Dayarathne & K.D.Hyde, 2020

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 : 50

Halocryptovalsa avicenniae (Abdel-Wahab, Bahkali & E.B.G.Jones) Dayarathne & K.D.Hyde , comb. nov.

Cryptovalsa avicenniae Abdel-Wahab, Bahkali & E.B.G.Jones , in Abdel-Wahab et al., Botanica Marina 60 (4): 469-488.

MYCOBANK. — MB 825272.

FACESOFFUNGI NUMBER. — FoF 03947.

DESCRIPTION AND ILLUSTRATION. — seeAbdel-Wahab et al. (2017).

DISTRIBUTION. — Saudi Arabia.

NOTES

Halocryptovalsa avicenniae , comb. nov. (synonym of Cryptovalsa avicenniae ) and its asexual stage (libertella-like) is kown from Avicennia marina from Australia and on driftwood from Saudi Arabia (Abdel-Wahab et al. 2017). This species morphologically resembles Cryptovalsa species as well as the new species, Halocryptovalsa salicorniae Dayarathne & K.D.Hyde , sp. nov. Halocryptovalsa avicenniae , comb. nov., has larger ascomata than other members of Diatrypaceae , lacks papillial furrows on the ascomata and has more ascospores per ascus (Abdel-Wahab et al. 2017). Therefore, it can be clearly distinguished from the previously described marine species, Cryptovalsa halosarceiicola , C. mangrovei and C. suaedicola . The presence of the asexual stage (libertellalike) in the same stroma is characteristic of this species. Morphological variation between Hcr. avicenniae and Hcr. salicornia e are compared in Table 4 .

Halocryptovalsa Dayarathne & K.D.Hyde , gen. nov., species do not form a stable position in our phylogenetic study. In our phylogenetic analyses with combined ITS+Btub neither Cryptovalsa rabenhorstii strains nor any other Cryptovalsa species grouped with Halocryptovalsa Dayarathne & K.D.Hyde , gen. nov., species, confirming Halocryptovalsa Dayarathne & K.D.Hyde , gen. nov., and Cryptovalsa as phylogenetically distant. Halocryptovalsa avicenniae , comb. nov., lack of ITS and BTUB sequence data in the GenBank. Therefore, we conducted a separate phylogenetic study with combined 18S and 28S rDNA sequences by including both Hcr. avicenniae and Hcr. salicorniae with selected diatrypaceous species following Abdel-Wahab et al. (2017) ( Figs 3 ; 4 ). According to our second phylogenetic analyses of 18S and 28S rDNA sequences, Halocryptovalsa avicenniae , comb. nov., strains formed a single clade with Hcr. salicorniae . Hence, by considering both morphological and phylogenetic affinities we accomadated these two species under the newly introduced genus Halocryptovalsa Dayarathne & K.D.Hyde , gen. nov.

Figures

FIG. 3. — Phylogram generated from the best scoring RAxML tree based on combined LSU and SSU sequence data. Bootstrap support values for maximum likelihood (ML, 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 branches. The tree is rooted to Xylaria hypoxylon (OCS 100004) and Xylaria acuta (5089). All sequences from ex-type strains are in bold. Scale bar: 0.02 (expected number of nucleotide substitutions per site per branch).

FIG. 4. — Phylogram generated from the best scoring MP tree based on combined LSU and SSU sequence data. Bootstrap support values for maximum parsimony (MP) equal or greater than 60 % are given above the nodes. The tree is rooted to Xylaria hypoxylon (OCS 100004) and Xylaria acuta (5089). Scale bar: 50 (expected number of nucleotide substitutions per site per branch).