Ascospores (20-)22–23(−26) × (8-)9–10(−11) μm, biseriate
to obliquely uniseriate and partially overlapping, ellipsoid tapering towards subacutely rounded ends, pale brown, 1-septate, constricted at the septum, smooth (Fig. 28f) (description referred to Phillips et al. 2008). Anamorph: Thyrostroma negundinis (Phillips et al. 2008). Material examined: USA, North Dakota, on branches of Symphoricarpos occidentalis Hook. (NY, holotype); Colorado, San Juan Co, c. 0.5 mile up Engineer Mountain Trail from turnoff at mile 52.5, Hwy 550, dead twigs of Symphoricarpos rotundifolius A. Gray, 24 Jun. 2004, A.W. Ramaley 0410 (BPI 871823, epitype). Notes Morphology Dothidotthia was formally established to accommodate Pseudotthia symphoricarpi (Montagnellaceae, Dothideales) (von Höhnel 1918a). Many mycologists considered Dothidotthia closely related to a genus of Venturiaceae such as Dibotryon by Petrak (1927), or Gibbera by von Arx and Müller (1954) and Müller and von Arx (1962). Dothidotthia MAPK inhibitor had been treated as a synonym of Gibbera (von Arx 1954; Müller and
von Arx 1962), which was followed by Shoemaker (1963) and Eriksson and Hawksworth (1987). Based on the coelomycetous anamorphic stage and peridium structure, shape of asci, as well as morphology of pseudoparaphyses, Barr (1987b, 1989b) retrieved Dothidotthia, and considered it closely related to Botryosphaeria (Botryosphaeriaceae). Currently, 11 species are included within Dothidotthia (http://www.mycobank.org, 01–2011). Phylogenetic study Based on a multi-gene phylogenetic analysis, Dothidotthia formed a separate familial clade (Phillips et al. 2008). MEK inhibitor Thus Dothidotthiaceae was introduced to accommodate it (Phillips et al. 2008). Concluding remarks By comparing the morphological characters and phylogenetic dendrograms by Phillips et al. (2008) and de Gruyter et al. (2009), Dothidotthia seems closely related to Didymellaceae, but Dothidotthiaceae should still be treated as a separate family. Dubitatio Speg., Anal. Soc. cient.
argent. 12: 212 (1881). (Arthopyreniaceae (or Massariaceae)) Generic description buy ICG-001 Habitat terrestrial, saprobic. Ascomata medium-sized, solitary, densely scattered, or in small groups of 2–4, Non-specific serine/threonine protein kinase immersed, covered with white crystaline rim, papillate, ostiolate. Hamathecium of dense pseudoparaphyses, long, 2–3 μm broad, branching and anastomosing. Asci cylindrical, pedicellate, with furcate pedicel. Ascospores 1-septate, asymmetrical, reddish to dark brown. Anamorphs reported for genus: Aplosporella-like (Rossman et al. 1999). Literature: Barr 1979b, 1987b; Müller and von Arx 1962; Rossman et al. 1999; Spegazzini 1881. Type species Dubitatio dubitationum Speg., Anal. Soc. cient. argent. 12: 212 (1881). (Fig. 29) Fig. 29 Dubitatio dubitationum (from NY, isotype; LPS, holotype). a Appearance of ascomata scattered on the host surface. Note the exposed white covering around the ostioles. b, c Section of an ascoma. Note the white covering (see arrow).