Astrosphaeriellopsis
Astrosphaeriellopsis Phook., Jian K. Liu & K.D. Hyde, in Phookamsak et al., Fungal Diversity: 10.1007/s13225-015-0352-7, [50] (2015).
Index Fungorum number: IF 551648; Facesoffungi number: FoF 01240, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on palms, visible as numerous, flattened, black spots on host surface. Sexual morph: Ascostromata scattered or gregarious, rarely clustered at the base, immersed beneath host epidermis, becoming raised, hemispherical, flattened at the base, uniloculate, glabrous, black, carbonaceous, ostiolate. Ostioles central, with minute papilla. Peridium thick walled, of unequal thickness, poorly developed at the base, composed of dark brown to black cells. Hamathecium composed of dense, filiform, anastomosing, trabeculate pseudoparaphyses, embedded in a hyaline gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, cylindric-clavate, short- to long-pedicellate, apically rounded, with ocular chamber. Ascospores overlapping 1–3-seriate, hyaline, becoming brown at maturity, fusiform, septate, constricted at the septum, smooth-walled, with an inconspicuous striations and mucilaginous sheath. Asexual morph: Unknown (adapted from Phookamsak et al. 2015).
Type species: Astrosphaeriellopsis bakeriana (Sacc.) Jian K. Liu, Phook. & K.D. Hyde
Notes: Astrosphaeriellopsis bakeriana was described by Saccardo (1918) as Winterina bakeriana Sacc. and was found on Livistona chinensis in Singapore. Hyde and Fröhlich (1998) examined the type specimen of Winterina bakeriana and introduced a new combination Astrosphaeriella bakeriana based on morphology. Astrosphaeriellopsis bakeriana was recollected by Liu et al. (2011) and DNA sequence data of the taxon was provided. Based on the phylogenetic analyses of Liu et al. (2011), A. bakeriana formed a distinct clade separating from Astrosphaeriella sensu stricto and close to the family Delitschiaceae. In the phylogenetic analyses of Phookamsak et al. (2015), A. bakeriana formed a single clade basal to Aigialaceae. The authors excluded A. bakeriana from Astrosphaeriella and introduced Astrosphaeriellopsis to accommodate A. bakeriana. Currently, Astrosphaeriellopsis is in Pleosporales genera incertae sedis and more collections are needed to establish the correct taxonomic position of the genus. Molecular markers available for Astrosphaeriellopsis are ITS, LSU, SSU, RPB2 and TEF-1.
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