Description of Allocanariomyces and Parachaetomium, two new genera, and Achaetomium aegilopis sp. nov. in the Chaetomiaceae [post]

Mehdi Mehrabi, Bita Asgari, Rasoul Zare
2020 unpublished
We describe Allocanariomyces tritici gen et sp. nov. and Achaetomium aegilopis sp. nov. as seed endophytes of wheat and its poaceous relatives in the west and northwestern provinces of Iran using morphological traits and sequences of ITS region, partial LSU rDNA, β-tubulin and the second largest subunit of DNA-directed RNA polymerase II genes. Chaetomium iranianum, C. truncatulum and C. carinthiacum are also combined here under the new genus, Parachaetomium. Allocanariomyces is differentiated
more » ... is differentiated from the closest genus, Canariomyces by having solitary, glabrous perithecia with walls of textura epidermoidea, stalked asci, densely granular-ornamented ascospores with a distinct subapical germ pore, and producing only solitary conidia. Parachaetomium has fusiform or navicular ascospores not bilaterally flattened, compared to Chaetomium with limoniform to globose, bilaterally flattened ascospores. Achaetomium aegilopis is mainly distinguished from A. strumarium, the closest relative, by possessing brown, often scattered perithecia, hyaline perithecial hairs covered with many hyaline crystals, hyaline chlamydospores, and lacking of the asexual morph.
doi:10.21203/rs.3.rs-38497/v1 fatcat:y6ha3sjvzbdwhfr44vok36ycwi