Yoshimuria


Yoshimuria is a genus of lichen-forming fungi in the family Teloschistaceae. It has four species of crustose lichens.

Taxonomy

The genus was circumscribed in 2014 by a group of lichenologists, who assigned Yoshimuria spodoplaca as the type species. Three species were originally included in the genus. The genus name honours the Japanese lichenologist Isao Yoshimura, "for his many contributions to lichenology in Eastern Asia".
Yoshimuria is in the subfamily Caloplacoideae of the family Teloschistaceae.

Description

Yoshimuria is characterised by a crust-like thallus, which can vary greatly in thickness from very thin to thick and can be . The colour of the thallus ranges from whitish grey to dark grey or brownish grey. The apothecia of Yoshimuria are either or , and are typically . The disc of these apothecia can be yellow, orange, or dark rust-brown in colour. The the tissue surrounding the hymenium of the apothecia, is, meaning it consists of hard, thick-walled cells. The, the layer beneath the hymenium, does not contain oil droplets.
The of Yoshimuria are, meaning they have two distinct compartments, with eight spores in each ascus. The conidia, or asexual spores, are broadly . Chemical spot tests reveal that the thallus reacts slightly or not at all and the apothecia turn purple when treated with a potassium hydroxide solution. The chemical constituents include anthraquinones, which follow the parietin, and atranorin in some species.

Species

Two species once proposed for inclusion in Yoshimuria are now included in other genera: