An order of the class Ascolichenes, shared by the class Ascomycetes. The order is also called the Pleosporales. The genera now assigned to this order were formerly classified in the Pyrenulales. They resemble the typical pyrenomycetous lichens except for the structure of the ascocarp, which is not a true perithecium. It is flask-shaped and lined with a layer of interwoven, branched pseudoparaphyses. The asci, with bitunicate walls, are located in scattered locules. Little is known about the structure and development of these ascocarps.