Pseudocoleodictyosporaceae Doilom & K.D. Hyde, fam. nov. Index Fungorum number: IF551979
Saprobic on dead wood of T. grandis. Sexual morph: Undetermined. Asexual morph: Colonies on natural substrate, superficial, punctiform, sporodochial, gregarious, scattered, numerous, black. Hyphae pale brown to brown, septate, slightly constricted at the septa. Conidiophores micronematous, erect to slightly curved, constricted at the septa, arising from hyphae. Conidiogenous cells blastic, integrated, terminal, determinate. Conidia dictyosporous to bulbil-like, muriform, initially pale brown, becoming brown to dark brown, horizontal on conidiogenous cell, very variable in size and shape; globose to ellipsoidal to irregular, with a protruding basal cell; truncate at the base.
Notes: The family Pseudocoleodictyosporaceae is established to accommodate the genus Pseudocoleodictyospora, and is a new family in the order Pleosporales, Dothideomycetes. Pseudocoleodictyosporaceae forms a robust clade basal to Roussoellaceae (Liu et al. 2014) and Torulaceae (Crous et al. 2015) in the individual LSU and combined LSU, SSU and RPB2 phylogenies. Its morphology is obviously different in conidial shape from asexual morphs of Roussoellaceae and Torulaceae. Species of Roussoellaceae have been reported sofar as coelomycetes. Members of Torulaceae and Pseudocoleodictyosporaceae are currently known as hyphomycetes. However, conidia of Pseudocoleodictyosporaceae species are dictyosporous or bulbil-like, while Torulaceae are phragmosporous, in branched chains. The family Pseudocoleodictyosporaceae consists of two new genera and four new species including, Pseudocoleodictyospora sukhothaiensis, Ps. tectonae, Ps. thailandica and Subglobosporium tectonae. All species currently occur on teak.
Type: Pseudocoleodictyospora Doilom & K.D. Hyde, gen.nov