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Published online by Cambridge University Press: 30 July 2021
Caloplaca tephromelae Kantvilas, Suija & Motiej., a lichenicolous species growing on saxicolous thalli of species of Tephromela, is described from Tasmania. The new species is characterized by lecanorine to zeorine apothecia with a whitish grey thalline margin devoid of anthraquinone pigments, a non-inspersed hymenium, paraphyses without oil vacuoles and ascospores 10–14 × 5–8 μm, with a septum 5–8 μm thick. It is compared with selected taxa of Caloplaca s. lat. that share these salient features. Molecular data support the distinctiveness of the new species but do not suggest any obvious close relatives.