Trichasterina
Trichasterina G. Arnaud, Annals d'École National d'Agric. de Montpellier, Série 2 16(1-4): 172 (1918) [1917].
Index Fungorum number: IF 5544; Facesoffungi number: FoF 06744, 11 morphological species (Species Fungorum 2022), no molecular data available.
Epiphytes on the upper surface, forming blackened, circular areas. Superficial hyphae spreading over the leaf surface, with appressoria and scattered with superficial thyriothecia and setae. Appressoria circular, lateral and alternative, sparsely septate. Sexual morph: Thyriothecia solitary, gregarious, superficial, easily removed from the host surface, black, opening with star-like fissures when mature. Upper wall comprising a thin layer of mostly neatly arranged dark cells, which are branched at the outer rim, from which hyphae strands develop, base poorly developed. Hamathecium usually lacking pseudoparaphyses, with asci vertical inside. Asci 8-spored, bitunicate, fissitunicate dehiscence not observed, globose to sub globose, apical region of asci usually with a thick opaque region ocular chamber not observed, not staining blue in IKI. Ascospores overlapping, conglobate, uniseptate, brown when mature, slightly constricted at the septum. Asexual morph: Unknown (adapted from Hongsanan et al. 2014).
Type species: Trichasterina styracis (Theiss.) G. Arnaud
Notes: Trichasterina morphologically resembles Asterina but differs in having setae on the hyphae. Hongsanan et al. (2014) retained Trichasterina as a distinct genus in Asterinaceae based on morphology. Trichasterina needs revision. Fresh collection with DNA sequence data are needed to confirm the systematic position of the genus.
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