Mazosia weii sp. nov. (Roccellaceae) from China, a new species supported by molecular data

A New Corticolous Species of Mazosia A.Massal. (Roccellaceae, Arthoniales) from Guadeloupe, Remarkable by its Byssoid Thallus

“…This tree is based on a three-locus dataset that has 35% of missing data (Table 1), so that the results must be taken with great care, but it has the advantage to include for the first time all data available on GenBank for the genus. The relationships are in accordance with those obtained by Yao et al (2021a, b) for smaller single-locus datasets. The new species is sister to the foliicolous Mazosia dispersa (J.Hedrick) R.Sant., and both are sister to the corticolous M. carnea , but these relationships are poorly supported.…”

“…The new species is sister to the foliicolous Mazosia dispersa (J.Hedrick) R.Sant., and both are sister to the corticolous M. carnea , but these relationships are poorly supported. As already pointed out previously, corticolous and foliicolous species do not form separate clades (Yao et al 2021b). Besides M. carnea and the new species, Mazosia sp.…”

“…Some species produce a pilose thallus such as Mazosia pilosa Kalb & Vězda and M. weii Z.T. Yao, S.H.Jiang & Z.F.Jia, or a tomentum such as M. tomentifera Vězda & Lumbsch (see Yao et al 2021b for a key to species of Mazosia with pilose thalli). These hairs like structures are developed from compact thalli, which are very different from the loosely arranged filamentous structure of a byssoid thallus.…”

“…The dataset was slightly modified, notably by including additional sequences of Mazosia that were retrieved from GenBank. For the matrix of Mazosia , sequences published in Frisch et al (2014), Ertz et al (2015) and Yao et al (2021a, b) were retrieved from GenBank (Table 1). The sequences were aligned using MAFFT v7.490 (Katoh & Standley 2013) on the CIPRES Web Portal (Miller et al 2010) and manually corrected for errors using Mesquite 3.04 (Maddison & Maddison 2015).…”

“…The genus was placed phylogenetically in the Roccellaceae, as sister to a lineage formed by the genera Dichosporidium Pat., Enterographa Fée and Erythrodecton G.Thor (Frisch et al 2014; Ertz et al 2015). Some species were recently newly described with the support of molecular data (Yao et al 2021a, b). The generic type, Mazosia rotula , has not been included in phylogenies yet, but the genus is assumed to be monophyletic.…”