TY - JOUR JO - Ascomycete.org JF - Ascomycete.org SN - 2100-0840 PB - Ascomycete.org TI - Rommelaarsia flavovirens gen. et sp. nov. (Helotiales), a new discomycete on Equisetum with a peculiar asexual state AU - Baral,Hans-Otoo AU - Haelewaters,Danny VL - 7 IS - 6 SP - 321 EP - 330 PY - 2015 Y1 - 2015/11/30 DA - 2015/11/30 DO - 10.25664/art-0155 UR - https://doi.org/10.25664/art-0155 AB - Rommelaarsia flavovirens gen. et sp. nov. is proposed. This inoperculate discomycete is known only from two collections in Western Europe, fruiting in spring on dead stems of Equisetum arvensis. An affiliation with the family Hyaloscyphaceae is suggested by the presence of short hairs on the superficially growing apothecium. The species is associated with an unusual, likewise unknown asexual state with large multiguttulate, holoblastic phragmoconidia formed in sporodochia. Phylogenetic analyses of the internal transcribed spacer (ITS) and large subunit (LSU) ribosomal DNA show that Rommelaarsia has an uncertain position within the Helotiales. Our analyses consistently show a close relationship to Cistella and Psilachnum, but there is no support for this placement. Bayesian analysis moderately supports the Cistella + Psilachnum + Rommelaarsia clade, which hints at the placement of Rommelaarsia within Hyaloscyphaceae. This agrees with the morphological data ID - AscoOrg-ID155 DB - Ascomycete.org https://ascomycete.org ER -