Osorio, Jhon AlexanderLinnakoski, RiikkaWingfield, Michael J.De Beer, Z. WilhelmRoux, Jolanda2022-02-142021-05Osorio, J.A., Linnakoski, R., Wingfield, M.J. et al. A new species in the Mycosphaerellaceae from Cecidomyiidae leaf galls on Avicennia marina in South Africa. Antonie van Leeuwenhoek 114, 515–526 (2021). https://doi.org/10.1007/s10482-021-01537-3.0003-6072 (print)1572-9699 (online)10.1007/s10482-021-01537-3http://hdl.handle.net/2263/83858SUPPLEMENTARY INFORMATION : Phylogram obtained from BI and ML analyses of the LSU data set. The isolates obtained from mangroves (in bold). The ex-type isolate of each species is indicated by T. BI posterior probabilities (PP) ≥90 % and Bootstrap support values (BS) >70 % are indicated near the nodes as BI/ML. * = PP <90.During studies to investigate the health of mangrove trees in South Africa, high numbers of Avicennia marina were found with leaf galls caused by unidentified adults and larvae of midges (Cecidomyiidae). Fungal fruiting structures were commonly observed on the abaxial areas of the galls. To determine the identity of the fungi associated with the gall midges, phylogenetic analyses using multigene sequence data were used. The nuclear large subunit (LSU), internal transcribed spacer (ITS), and a portion of the actin gene region (ACT), were amplified and analyzed. The results revealed that the fungal fruiting structures represent a new taxon in the Mycosphaerellaceae described here as Zasmidium mangrovei sp. nov. This is the first report of a species in the Mycosphaerellaceae associated with cecidomyiid leaf galls on A. marina.en© The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature 2021. The original publication is available at : http://link.springer.comjournal/10482.1 novel taxonAngiospermsCapnodialesMangrovesWhite mangrovePostprint Article