Paraopeba
Paraopeba V.P. Abreu, A.A.M. Gomes, Firmino & O.L. Pereira, in Crous et al., Persoonia 39: 349 (2017).
Index Fungorum number: IF 821209; Facesoffungi number: FoF 06740, 1 morphological species (Species Fungorum 2022), no molecular data available
Leaf spots epiphyllous, circular to irregular, single to confluent, brown. Sexual morph: Unknown. Asexual morph: Hyphae straight to slightly flexuous, brown, septate, smooth. Appressoria numerous, entire, globose to cylindrical, alternate to unilateral, unicellular, brown, penetration peg central on the appressorial cell. Conidiogenous cells schizolytic, cylindrical to elliptical, light brown to brown, smooth. Conidia cylindrical, multicellular, brown, smooth, rounded ends, septate (adapted from Crous et al. 2017).
Type species: Paraopeba schefflerae V.P. Abreu, A.A.M. Gomes, Firmino & O.L. Pereira
Notes: Paraopeba is characterised by epiphyllous, circular to irregular leaf spots, globose to cylindrical appressoria, schizolytic, cylindrical to elliptical, light brown to brown conidiogenous cells and cylindrical, multicellular, brown, smooth conidia. In the phylogenetic analysis of Crous et al. (2017), Paraopeba forms a distinct lineage in Asterinaceae. Paraopeba differs from Alysidiella, Blastacervulus and Asterostomula in forming conidia via schizolytic conidiogenous cells while the three later genera form conidia inside a sporodochial, acervular and pycnothyrial conidiomata, respectively (Giraldo et al. 2017). Paraopeba is also unique in forming appressoria which is lacking in Alysidiella, Blastacervulus and Asterostomula (Giraldo et al. 2017). In the phylogenetic analysis of Hongsanan et al. (2020b), P. schefflerae clustered in Thyrinulaceae. Paraopeba is a distinct genus in Thyrinulaceae. Molecular markers available for Paraopeba include ITS, BTUB and TEF-1.
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