<I>Myrtaceae</I>, a cache of fungal biodiversity

Abstract

Twenty-six species of microfungi are treated, the majority of which are associated with leaf spots of Corymbia, Eucalyptus and Syzygium spp. (Myrtaceae). The treated species include three new genera, Bagadiella, Foliocryphia and Pseudoramichloridium, 20 new species and one new combination. Novelties on Eucalyptus include: Antennariella placitae, Bagadiella lunata, Cladoriella rubrigena, C. paleospora, Cyphellophora eucalypti, Elsinoë eucalypticola, Foliocryphia eucalypti, Leptoxyphium madagascariense, Neofabraea eucalypti, Polyscytalum algarvense, Quambalaria simpsonii, Selenophoma australiensis, Sphaceloma tectificae, Strelitziana australiensis and Zeloasperisporium eucalyptorum. Stylaspergillus synanamorphs are reported for two species of Parasympodiella, P. eucalypti sp. nov. and P. elongata, while Blastacervulus eucalypti, Minimedusa obcoronata and Sydowia eucalypti are described from culture. Furthermore, Penidiella corymbia and Pseudoramichloridium henryi are newly described on Corymbia, Pseudocercospora palleobrunnea on Syzygium and Rachicladosporium americanum on leaf litter. To facilitate species identification, as well as determine phylogenetic relationships, DNA sequence data were generated from the internal transcribed spacers (ITS1, 5.8S nrDNA, ITS2) and the 28S nrDNA (LSU) regions of all taxa studied.

Fungi associated with black mould on baobab trees in southern Africa

“…Rachicladosporium species have been isolated from leaf and twig litter in the USA (Cheewangkoon et al 2009;Crous et al 2009), leaf spots on Luculia sp. in New Zealand (Crous et al 2007) and needles of Pinus monophylla in the Netherlands (Crous et al 2011).…”

“…5f, g) blastocatenate, ellipsoid to fusoid (5-)6-11(-15)  (2-)3-4(-5) µm, 0-1-septate; hila darkened, thickened and slightly refractive, 0.5-1 µm diam. Notes -This species is phylogenetically most closely related to R. americanum and R. cboliae, but R. africanum has smaller terminal conidia and ramoconidia than R. americanum (conidia 10-18× 3-4 μm; ramoconidia 13-23 × 3-4 μm) (Cheewangkoon et al 2009;Crous et al 2009). Furthermore R. africanum also forms chlamydospores whereas these are absent in R. americanum.…”

New and interesting chaetothyrialean fungi from Spain

“…Many hyphomycetous genera outside Chaetothyriales produce a conidial apparatus similar to that of Rhinocladiella, e.g. Myrmecridium (Myrmecridiaceae, Sordariomycetes), Pseudoramichloridium (Teratosphaeriaceae, Capnodiales), Radulidium (incertae sedis, Sordariomycetes), Ramichloridium (Mycosphaerellaceae, Capnodiales), Rhodoveronaea (Annulatascaceae, Sordariomycetes), and Veronaeopsis (close to Venturiaceae, Pleosporales), probably reflecting convergent evolution (Arzanlou et al 2007;Cheewangkoon et al 2009). …”

“…In this strain, chlamydospores were abundant at 30 °C, but were less frequent at lower temperatures, suggesting that thermal stress might stimulate their production when approaching the maximum tolerated. None of the species currently accepted in Cyphellophora has been reported to produce chlamydospores in culture (Matsushima 1987;de Hoog et al 2000;Decock et al 2003;Cheewangkoon et al 2009;Feng et al 2012;Réblová et al 2013;Gao et al 2015;Crous et al 2016). Hyphal coils were abundant in C. chlamydospora, but these are also produced by many other species of Cyphellophora as well as other genera of Chaetothyriales (Feng et al 2012;Crous et al 2007bCrous et al , 2013, and are morphologically very variable, indicating that they are not taxonomically informative.…”

Re-evaluation of Cryptosporiopsis eucalypti and Cryptosporiopsis-like species occurring on Eucalyptus leaves

“…Leaf blight and other foliar diseases induced by C. eucalypti can easily be confused with those caused by other plant-pathogenic fungi, such as Mycosphaerella spp. and their anamorphs (Cheewangkoon et al 2008(Cheewangkoon et al , 2009Crous 2009), and Calonectria (Crous et al 2004b(Crous et al , 2006aLombard et al 2009Lombard et al , 2010.…”