Extrawettsteinina M.E. Barr, Contr. Univ. Mich. Herb. 9(8): 538 (1972).
Saprobic on dead leaves and wood. Sexual morph: Ascomata scattered, erumpent to superficial, globose or conical, dark brown to black, carbonaceous. Papilla black, with a porelike ostioles, ostiolar canal filled with periphyses. Peridium a single layer composed of compressed, thick-walled cells, fusing with the host at the outside. Hamathecium of dense broad, cellular pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindrical, apex rounded with and a minute ocular chamber with short pedicel. Ascospores uniseriate, slightly overlapping, ellipsoid, obovate-clavate, 3-septate, slightly to not constricted at the septum, wall smooth. Asexual morph: undetermined (Adapted from Ariyawansa et al., 2014).
Type species: Extrawettsteinina minuta M.E. Barr
Notes: Extrawettsteinina was introduced by Barr (1972) with E. minuta as type species. Extrawettsteinina is characterized by scattered, erumpent to superficial, globose or conical, dark brown to black, carbonaceous ascomata, fissitunicate, cylindrical asci, ellipsoid, obovate-clavate, 3-septate ascospores. The diagnostic morphological character of Extrawettsteinina is the conic superficial ascomata and radiating arrangement of wall cells. One species Extrawettsteinina pinastri was treated as synonyms of Kriegeriella mirabilis based on morphology and was included in the section of Kriegeriella (von Arx & Müller, 1975; Barr, 1975). Barr (1987b) introduced Kriegeriellaceae (Dothideales) to accommodate Kriegeriella and Extrawettsteinina but this treatment was not followed by consequent authors. Ariyawansa et al. (2014) observed the holotype of Extrawettsteinina minuta (NY, 01103003) but could not observed any ascomata in the type specimen and provided an updated description from another specimen of E. minuta (NY, 4278), collected from the same host and by the same collector. Ariyawansa et al. (2014) tentatively placed Extrawettsteinina in Pleosporaceae following Lumbsch and Huhndorf (2010) and Zhang et al. (2012). Extrawettsteinina is currently a distinct genus in Pleosporaceae but fresh collections with DNA sequence data is needed to confirm the taxonomic placement. Molecular data is lacking for the type species. Extrawettsteinina needs to be epitypified.