Mycerema Bat., J.L. Bezerra & Cavalc., in Batista et al., Publicações Inst. Micol. Recife 392: 5 (1963).
MycoBank number: MB 3301; Index Fungorum number: IF 3301; Facesoffungi number: FoF 01939; 1 morphological species (Phookamsak et al. 2016), molecular data unavailable.
Type species – Mycerema vochysiacearum Bat., J.L. Bezerra & Cavalc., in Batista et al., Publicações. Instituto de Micologia da Universidade do Recife & Instituto Nacional de Pesquis 392: 7 (1963).
Notes – Mycerema was introduced to accommodate a single species. The type species was collected from leaves of Vochysiacea sp. in Brazil. The genus was characterized by brown, plane, orbicular, dimidiate, membranous ascomata, with irregular dehiscence, hyaline to subhyaline, reticular, pseudoparenchymatous cells of the peridium, 8-spored, bitunicate, oblong to globose asci and hyaline, claviform, 1-septate ascospores (Batista et al. 1963, Phookamsak et al. 2016). Hyde et al. (2013) examined the type specimen of M. vochysiacearum and synonymized the species as Vizella vochysiacearum. Batista et al. (1963) mentioned that M. vochysiacearum was associated with Vizella bingervilliana and Plenotrichaius hiloensis. Phookamsak et al. (2016) re-examined the same specimen as described in Hyde et al. (2013) and found only Vizella bingervilliana on the type specimen, whereas, Mycerema vochysiacearum could not be found. Phookamsak et al. (2016) mentioned that Hyde et al. (2013) might have misidentified Vizella bingervilliana as Mycerema vochysiacearum and thus, they transferred M. vochysiacearum to Vizella. Phookamsak et al. (2016) observed the protologue and iconotype of M. vochysiacearum and indicated that the protologue did not match with Vizella vochysiacearum as described in Hyde et al. (2013). Phookamsak et al. (2016) considered that the taxon on the host was Vizella bingervilliana (as V. vochysiacearum in Hyde et al. 2013) and reinstated Mycerema and its type species, M. vochysiacearum in Schizothyriaceae. Hyde et al. (2011) and Wijayawardene et al. (2012) reported the asexual morph of Mycerema as the coelomycetous genus Plenotrichaius.