Dothideomycetes families incertae sedis » Pododimeriaceae

Pododimeria

Pododimeria E. Müll., Sydowia 12(1–6): 193 (1959) [1958].

Index Fungorum number: IF 4279; Facesoffungi number: FoF 07897, 4 morphological species (Species Fungorum 2022), no molecular data available.

Parasitic on living coniferous leaves. Sexual morph: Ascomata superficial, globose to subglobose, forming a basal hypostromatic stalk, with dark hyphal strands, solitary, scattered, easily removed, black, with apical ostiole. Peridium comprising multi-layers of brown cells of textura angularis. Hamathecium comprising dense, branched, septate, hyaline pseudoparaphyses, constricted at the septa. Asci 8-spored, bitunicate, cylindrical to broadly clavate or ellipsoid, sessile or with knob-like pedicel, apex rounded with an ocular chamber. Ascospores 2−3-seriate, irregularly arranged, ellipsoid-fusiform to subclavate, rounded at both ends, uniseptate, constricted at the septum, upper cell wider than lower cell, septum supramedian, olivaceous brown, with minutely verruculose walls. Asexual morph: Unknown (adapted from Boonmee et al. 2017).

 Type species: Pododimeria gallica E. Müll.

Notes: Pododimeria is characterised by superficial, globose to subglobose ascomata, cylindrical to broadly clavate or ellipsoid asci and ellipsoid-fusiform to subclavate, uniseptate ascospores. The taxonomic placement of Pododimeria has undergone many changes. Pododimeria was placed in Capnodiaceae, Dimeriaceae and Parodiellaceae based on the epiphytic habit and ascomatal and ascospores characters (Gäumann 1964, von Arx & Müller 1975, Barr 1987, Jaklitsch et al. 2002, Boonmee et al. 2017). Hawksworth et al. (1995) placed Pododimeria in Pseudoperisporiaceae based on morphology and this was followed by Kirk et al. (2008), Lumbsch and Huhndorf (2010), Hyde et al (2013) and Wijayawardene et al. (2014). Boonmee et al. (2017) re-examined the holotype specimen of P. gallica (Z 22813/11) and transferred Pododimeria to a new family Pododimeriaceae based on ascomatal and ascospores features. Pododimeria is a distinct genus in Pododimeriaceae but this taxonomic placement must be confirmed by molecular data.

 

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