Shivarov, V. V. 2019. Clypeococcum hemiamyloideum (Polycoccaceae, Ascomycota), a novel lichenicolous fungus on Verrucaria latebrosa. - Herzogia 32: 438–443.
Clypeococcum hemiamyloideum is described as a novel lichenicolous fungus on Verrucaria latebrosa from the Malyovitsa River, Bulgaria. It is characterized by two types of hymenial gels: lower gel predominant, hemiamyloid (1+ red), upper gel only in the ostiolar region, euamyloid (1+ blue), a variable spore number in the mature asci (1–8), pseudothecia 100–175 µm diam., black, and ascospores 17.8–20.3 x 6.6–7.6 µm, brown, thick-walled, warted, 1-sep-tate. The reactions of the hymenial gels in C. hemiamyloideum and V. latebrosa were tested with different concentrations of IKI in order to identify their types and thresholds.