Dothideomycetes » Dothideomycetes, genera incertae sedis

Passeriniella

Passeriniella Berl., Icon. fung. (Abellini) 1(1): 51 (1890).

 Index Fungorum number: IF 3760; Facesoffungi number: FoF 12355, 4 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on host. Sexual morph: Ascocarps globose to subglobose, immersed in the substratum beneath a thin stroma, solitary or gregarious, dark brown to black, coriaceous, ostiolate and papillate. Neck black, with periphyses. Pseudoparaphyses numerous, filamentous, branched, hyaline, faintly septate. Peridium composed of 2 layers, an outer layer of irregular melanized hyphae amongst host cells and an inner layer of thick-walled irregular cells forming a textura angularis. Asci 4-spored, cylindrical, pedunculate, thick-walled, bitunicate (fissitunicate), with an ocular chamber at maturity, endoascus swelling in water, stretching and pushing the ascus into the ostiolar canal, arising from a basal ascogenous tissue. Ascospores uniseriate, ellipsoidal, 3-septate, constricted at the central septum, central cells brown, large, end cells small, conical and hyaline. Asexual morph: Unknown (adapted from Hyde & Mouzouras 1988).

 Type species: Passeriniella dichroa (Pass.) Berl.

Notes: Passeriniella is characterised by globose to subglobose ascocarps, ostiole filled with periphyses, numerous, filamentous pseudoparaphyses, cylindrical, pedunculate asci and uniseriate, ellipsoidal, 3-septate, hyaline ascospores. Berlese (1890) added two species P. dichroa and P. incarcerata. Several species were added by other authors (Petrak 1951, Hyde & Mouzouras 1988, Maria & Sridhar 2002). Kohlmeyer and Kohlmeyer (1979) considered P. dichroa and P. incarcerata as synonyms of Leptosphaeria obiones (P. Crouan & H. Crouan) Sacc. In the phylogenetic analysis of Suetrong et al. (2009) based on SSU, LSU, TEF-1 and RPB2, P. savoryellopsis was closely related to Acrocordiopsis patilii but formed an unsupported clade without a familial placement. Zhang et al. (2009, 2012), Jones et al. (2009, 2015) and Wijayawardene et al. (2017, 2020) referred Passeriniella to Dothideomycetes genera incertae sedis. Molecular data is available for only one species P. savoryellopsis (LSU, SSU and TEF-1). More collections with DNA sequence data are needed to confirm the systematic position of Passeriniella.

 

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