Chaetothyrina mangiferae sp. nov., a new species of Chaetothyrina

Abstract

Chaetothyrina musarum and C. mangiferae sp. nov. (Micropeltidaceae, Dothideomycetes) are reported from fruits of Musa sp. (Musa acuminata × Musa balbisiana) and Mangifera indica, respectively. Introduction of a new species, Chaetothyrina mangiferae, and provision of a reference specimen for C. musarum with sequence data, supported by morphology will help to stabilize the taxonomy of the genus and family. Maximum likelihood and Bayesian analyses of LSU and SSU sequence data show that C. musarum forms a distinct clade with other genera in Micropeltidaceae within Capnodiales and C. mangiferae clusters in a poorly supported clade in Dothideomycetes, Illustrated accounts of Chaetothyrina musarum (reference specimen) and C. mangiferae are provided and compared with similar taxa. This is the first report of C. musarum causing sooty blotch and flyspeck disease on Musa sp. (Musaceae) in Thailand and C. mangiferae causing sooty blotch and flyspeck disease of Mangifera indica (Anacardiaceae) worldwide.

A new species of Chaetothyrina on branches of mango, and introducing Phaeothecoidiellaceae fam. nov.

“…Chaetothyrina was introduced by Theissen (1913), the type species is C. musarum. A reference type specimen and sequence data generated from ITS, LSU and SSU sequence data were provided by Singtripop et al (2016). The phylogenetic placement of Chaetothyrina is now shown to lie within Capnodiales (Singtripop et al 2016, and this study).…”

“…A reference type specimen and sequence data generated from ITS, LSU and SSU sequence data were provided by Singtripop et al (2016). The phylogenetic placement of Chaetothyrina is now shown to lie within Capnodiales (Singtripop et al 2016, and this study). The morphological characters are similar to Micropeltidaceae in Microthyriales; but differs in having inconspicuous superficial hyphae (sometimes this may be absent) and thyriothecia with setae (Reynolds & Gilbert 2005).…”

“…Sequences that relate to Chaetothyrina species were obtained from GenBank following previous publications to supplement the dataset (Table 1, Ariyawansa et al 2015, Hongsanan et al 2015b, Singtripop et al 2016. Forty sequences were downloaded and are included with the newly generated sequences from this study, Chaetothyrina guttulata (Fig.…”

“…There are several epiphytic fungi which cause sooty blotch and flyspeck disease on the epicuticular wax layer of fruits, leaves and stems of various plants (Batzer et al 2005, 2010, Yang et al 2010, Cooley et al 2011, Miñarro & Dapena 2012, Hao et al 2013, Zhang et al 2015. Sooty blotch and flyspeck disease fungi have a wide distribution, and are common in humid temperate regions (Yang et al 2010, Singtripop et al 2016. Both diseases can occur together since they are favoured by similar environmental conditions (Wilcox 1994).…”

“…Microthyriales is placed in the class Dothideomycetes (Hyde et al 2013), and is characterized by flattened thyriothecia appearing as small black dots, with thyriothecial setae in some species, various ostiolar forms, while the basal wall is poorlydeveloped. Asci are bitunicate, and ascospores are uni-to multi-septate and hyaline or brown (Arnaud 1918, Luttrell 1973, von Arx & Müller 1975, Barr 1987, Kirk et al 2008, Hyde et al 2013, Hongsanan et al 2014a, Singtripop et al 2016). There are two families accepted in Microthyriales based on morphology, which are Microthyriaceae and Micropeltidaceae (Hyde et al 2013, Hongsanan et al 2014a, Wijayawardene et al 2014, Ariyawansa et al 2015.…”