Delimitation, new species and teleomorph-anamorph relationships in Codinaea, Dendrophoma, Paragaeumannomyces and Striatosphaeria (Chaetosphaeriaceae) Author Reblova, Martina The Czech Academy of Sciences, Institute of Botany, Department of Taxonomy, Pruhonice 252 43, Czech Republic https://orcid.org/0000-0001-5229-1709 martina.reblova@ibot.cas.cz Author Nekvindova, Jana Department of Clinical Biochemistry and Diagnostics, University Hospital Hradec Kralove, Hradec Kralove 500 05, Czech Republic https://orcid.org/0000-0002-2861-5483 Author Fournier, Jacques Las Muros, Rimont 09420, France Author Miller, Andrew N. Illinois Natural History Survey, University of Illinois Urbana-Champaign, Champaign, Illinois 61820, USA https://orcid.org/0000-0001-7300-0069 text MycoKeys 2020 74 17 74 http://dx.doi.org/10.3897/mycokeys.74.57824 journal article http://dx.doi.org/10.3897/mycokeys.74.57824 1314-4049-74-17 ABBEDA6BFAD45DC6BC542EFF61A9C78F Paragaeumannomyces smokiensis Reblova & A.N. Mill. sp. nov. Figure 10 Typification. USA - Tennessee • Sevier Co., Great Smoky Mountains National Park, Greenbrier, alternative side trail to Whaley Cemetery; alt. 549 m; 10 Jul. 2005; on decaying wood; A.N. Miller & A.M. Stchigel leg.; A.N.M. 466 ( holotype : ILLS00121398!). Etymology. Named after the Great Smoky Mountains National Park from where it was collected. Description on the natural substrate. Teleomorph: Ascomata perithecial, non-stromatic, superficial, solitary or in small groups, 270-390 μm diam, 320-400 μm high, subglobose to broadly conical, finely roughened, dark reddish-brown, glabrous except for the black papilla with dark brown, stiff, acute setae, 9.5-13.5 x 2-2.5 μm , densely aggregated around the ostiole. Ostiole periphysate. Ascomatal wall leathery, three-layered; outer layer of textura angularis consisting of globose to subglobose, reddish-brown cells; middle layer composed of brick-like, brown cells; inner layer of flattened, thin-walled, subhyaline cells. Paraphyses abundant, hyaline, longer than the asci, tapering. Asci (134-)140-174(-189) x 11-13(-14) μm (mean +/- SD = 158.2 +/- 19.4 x 12.3 +/- 0.9 μm ), cylindrical-fusiform, stipitate, apically narrowly rounded, ascal apex non-amyloid with a distinct apical annulus 2-2.5 μm wide, 1-1.5 μm high. Ascospores (58-)60.5-80.5 x (3-)3.5-4.5(-5) μm (mean +/- SD = 69.8 +/- 6.3 x 4.0 +/- 0.5 μm ), filiform to cylindrical, straight or slightly curved, hyaline, 9-11-septate, septa often unevenly distributed, not constricted at the septa, asymmetrical, rounded at the apical end, tapering towards the basal end, with one or two guttules in each cell, 2-3-seriate or 4-seriate and partially overlapping, seldom in a single fascicle. Anamorph: Unknown. Figure 10. Paragaeumannomyces smokiensis (ILLS00121398). A, B ascomata C globose cells of the outer layer of the ascomal wall and an ostiolar seta D, E asci F, G ascal apex with apical annulus H-K ascospores. Scale bars: 250 μm ( A, B ); 50 μm ( C ); 20 μm ( D, E ); 10 μm ( F-K ). Habitat and distribution. A saprobe on decaying wood, known only from the USA. Notes. The present species is most similar to P. abietinus , the only member of the genus known from Europe. They share dark reddish-brown, glabrous ascomata with short setae surrounding the ostiole. Although the size of ascospores of both species overlap, P. abietinus differs from P. smokiensis by longer [(185-)195-240 x 12-14.5(-15.5) μm ] asci and slightly longer and wider ascospores [(62-)65-87 x (3.5-)4-5.5 μm ] with usually less septa [(5-)7-9(-11)].