Dothideomycetes » Dothideomycetes, genera incertae sedis


Phaeopeltosphaeria Berl. & Peglion, Nuovo G. bot. ital. 24(3): 139 (1892).

Index Fungorum number: IF 3932; Facesoffungi number: FoF 12377, 5 morphological species (Species Fungorum 2022), no molecular data available.

Saprobic on host. Sexual morph: Pseudothecia, gregarious, scattered, generally isolated, but also grouped at most, two ascomas in a eutypoid arrangement, never in a valsoid arrangement, very numerous, immersed, subcortical, easily detectable, when wet, due to its transparency through the epidermis of the host and, when dry, by the discreet elevations that they produce in the bark of the branches and by their papilla, blackish, large and obtuse, which protrudes very discreetly from the surface. Rounded or broadly elliptical, blackish, elongate into short ostiolate necks closing in a thick, obtuse papilla. A clypeoid, blackish and stromatized matter, wider in the central region than in the periphery, is arranged, as a protective shield, above the pseudothecia. Asci bitunicate, fissitunicate, wider in the middle and narrower both towards the apex and towards a truncate base, sharply indented, containing eight irregularly 2-seriateascospores. Ascospores fusiform, hyaline at first, yellowish gray when fully mature, with 5–7 transverse septa, of which only the one situated in a middle position is more conspicuous, and 1–3 vertical ones, without gelatinous sheaths. The spores form, almost without exception, a long-tapered tail which gives the spore a quirky appearance. Pseudoparaphyses cylindrical, hyaline, septate, multigutulate and attenuated towards the apex, immersed in a gelatinous matrix. Asexual morph: Unknown (adapted from Domínguez 2018).

 Type species: Phaeopeltosphaeria caudata Berl. & Peglion

Notes: Phaeopeltosphaeria is characterised by gregarious, scattered pseudothecia, bitunicate, fissitunicate asci and fusiform, hyaline to yellowish grey ascospores with 5–7 transverse septa and 1–3 vertical septa, lacking a gelatinous sheath. Molecular data is lacking. Lumbsch and Huhndorf (2010), Kirk et al. (2013) and Wijayawardene et al. (2017, 2020) listed Phaeopeltosphaeria in Dothideomycetes genera incertae sedis. Fresh collections with DNA sequence data are needed to confirm the taxonomic position of Phaeopeltosphaeria.


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