Thyrinula Petr. & Syd., Annls mycol. 22(3/6): 373 (1924).
= Alysidiella Crous, in Summerell et al., Fungal Diversity 23: 325 (2006).
MycoBank number: MB 10218; Index Fungorum number: IF 10218; Facesoffungi number: FoF 06728; 5 morphological species (Crous et al. 2019c), 5 species with molecular data.
Type species: Thyrinula eucalyptina Petr. & Syd., Annls mycol. 22(3/6): 373 (1924)
Notes: Thyrinula is characterized by hysterothecia opening by elongated, longitudinal or Y-shaped slits, and 1-septate ascospores. Its asexual morph Alysidiella was introduced to accommodate a single species with both aseptate and multi-septate conidia. Crous et al. (2019c) provided sequence data of all members of the genus from fresh collections, and synonymized Alysidiella under Thyrinula based on morphology (Fig. 132).
Fig. 132 Morphology of Thyrinula spp. (a–d = Thyrinula eucalypti redrawn from Crous et al. 2019c; e–g = Thyrinula parasitica redrawn from Summerell et al. 2006). a Ascomata on lesion surface. b Vertical section through ascomata. c Asci. d Ascospores. e–g Conidiophores and conidia. Scale bars = 10 μm