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A&B, Abrothallus granulatae. A, C&D, Vouauxiomyces granulatae. A, Habit. Arrow: pycnidia of V. granulatae; B, Section of ascoma; C, Conidia; D, Conidiogenous cells. Scales: A = 0-5 mm; B = 75 urn; C = 10 nm; D = 10 ^im. (A, Wedin 1066a; B, Wedin 1100a; C, Wedin 1066b; D, Wedin 1100b).

A&B, Abrothallus granulatae. A, C&D, Vouauxiomyces granulatae. A, Habit. Arrow: pycnidia of V. granulatae; B, Section of ascoma; C, Conidia; D, Conidiogenous cells. Scales: A = 0-5 mm; B = 75 urn; C = 10 nm; D = 10 ^im. (A, Wedin 1066a; B, Wedin 1100a; C, Wedin 1066b; D, Wedin 1100b).

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Abrothallus secedens Wedin & R. Sant. sp. nov., commensalistic on species of Pseudocyphellaria, from Argentina and Kenya and Abrothallus granulatae Wedin sp. nov., parasitic on Pseudocyphellariagranulata, from Argentina (Tierra del Fuego) are described. Vouauxiomycesgranulatae Wedin sp. nov., is regarded as the anamorph of A. granulatae. Sphaerello...

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Context 1
... immersed in the host tissue, I -. Ascomata ( Fig. 3A & B) 0 1 - 0-4 mm diam., apothecioid, superficial, sessile or shortly stipitate, black, younger apothecia often with a dense yellowish green pruina; apothecia formed in dense groups within discoloured, pale brownish spots on the host thallus; stipe, when present, up to 30 um tall and 60 um wide; excipulum lacking or very indistinct; ...
Context 2
... than A. granulatae), causing the infected Ramaltna apothecia to become darkened. These two Abrothallus species thus seem to share several characteristics, including having anamorphs with relatively small conidia. The pycnidia of V. granulatae are produced in the same discoloured spots as, and often very close to the ascomata of, A. granulatae (Fig. 3A). This I consider an indication of an anamorph-teleomorph ...
Context 3
... (Fig. 3A) pycnidial, c. 50-75 nm tall and c. 40-100 (im wide, partly immersed, with a distinct ostiole, arising within discoloured, pale brownish spots on the host thallus; conidiomata wall c. 15-35 |am thick, com- posed of thick-walled pseudoparenchymatous cells, wall hyaline to pale brown in the lower, immersed part, outer wall layers dark ...
Context 4
... pale brownish spots on the host thallus; conidiomata wall c. 15-35 |am thick, com- posed of thick-walled pseudoparenchymatous cells, wall hyaline to pale brown in the lower, immersed part, outer wall layers dark brown to black in the upper part of the conidioma. Mycelium immersed in the host thallus; I -. Conidiophores absent. Conidiogenous cells (Fig. 3D) lining the pycnidial cavity, hyaline, cylindrical to narrowly lageniform, c. 2-0-2-5 x (60 -)6-5-80um; conidiogenesis annellidic, anellations indistinct. Conidia (Figs. 3C, 4C) holoblastic, simple, smooth-walled by light microscopy, cuneiform, 4-5- 5-5( -60) x 2-5-3-5 ^m; apex rounded; base distinctly truncate, broader than ...
Context 5
... immersed part, outer wall layers dark brown to black in the upper part of the conidioma. Mycelium immersed in the host thallus; I -. Conidiophores absent. Conidiogenous cells (Fig. 3D) lining the pycnidial cavity, hyaline, cylindrical to narrowly lageniform, c. 2-0-2-5 x (60 -)6-5-80um; conidiogenesis annellidic, anellations indistinct. Conidia (Figs. 3C, 4C) holoblastic, simple, smooth-walled by light microscopy, cuneiform, 4-5- 5-5( -60) x 2-5-3-5 ^m; apex rounded; base distinctly truncate, broader than ...

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... NOTE. -This species is known from scattered finds in Argentina, Chile, Colombia, the U.S.A. and Kenya (Etayo 2002, Etayo & Sancho 2008, Spribille et al. 2010, Wedin 1994 NOTE. -The ascospores in the specimen cited here are somewhat wider than reported for the species by Hawksworth & Santesson (1990) DESCRIPTION. ...
... Lit.: Alstrup & Cole 1998;Alstrup & Hawksworth 1990;Aptroot el al. 1997;Awasthi 1991;Berger & Zimmermann 2016;Coppins & Kondratyuk 1998;Ertz 2009;Ertz et al. 2004Ertz et al. , 2005Etayo 1996Etayo , 2007Etayo , 2010bEtayo , 2017Etayo & Aptroot 2006;Follmann & Werner 2003;Hafellner 1985bHafellner , 1994aHafellner , 2007Hafellner , 2009Harris & Ladd 2007;Isbrand & Alstrup 1992;Kalb & Elix 1995;Kondratyuk & Galloway 1995c;Kondratyuk et al. 2015Kondratyuk et al. , 2016bLücking 1998 Lit. : Brackel 2015;Brackel & Puntillo 2016;Diederich 1990Diederich , 2004aDiederich , 2011Etayo 2002Etayo , 2010bEtayo , 2017Etayo & Diederich 1995;Etayo & Osorio 2004;Hafellner 1994a;Hawksworth 1990a;Ihlen & Wedin 2008;Kondratyuk 1996b;Nordin 1964;Pérez-Ortega et al. 2014;Suija 2006;Suija et al. 2011Suija et al. , 2015aWedin 1994 Lit.: Alstrup & Cole 1998;Christiansen 1956Christiansen , 1980Diederich 1986;Hawksworth 1977bHawksworth , 1981Kondratyuk & Galloway 1995b;Kondratyuk et al. 1994;Lawrey et al. 2011. Order Lit.: Aptroot et al. 1997;Etayo 2002a;Hafellner 1979Hafellner , 1985bKalb 1990 & Hawksworth 2001;Diederich 1989Diederich , 1990Diederich , 1992bDiederich & Zhurbenko 1997Ertz et al. 2016 Lit.: Brackel 2008Brackel , 2010aEtayo 1996Etayo , 2017Etayo & Diederich 1996a;Hafellner 1994aHafellner , 2015Hawksworth 1981Hawksworth , 1994Hawksworth , 2003Khodosovtsev et al. 2018;Kocakaya et al. 2015;Kondratyuk 2008;Kondratyuk et al. 2012Kondratyuk et al. , 2013Lawrey et al. 2012 Lit.: Alstrup & Hawksworth 1990;Matzer et al. 1994;Mayrhofer 1984aMayrhofer , 1984bRambold & Triebel 1992. ...
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... (n=25). The most similar species is Abrothallus granulatae Wedin which differs from A. suecicus in the shape of conidiogenous cells and conidia as well as in host selection (Wedin 1994). The species is distinguishable from other members of the genus due to the overall smaller dimensions of its pycnidia and conidia (Hawksworth 1981). ...
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Data on 17 species of lichenized and lichenicolous fungi from Belarus are presented, of which three lichens (Fuscidea pusilla, Protoparmelia hypotremella, and Ropalospora viridis) and 13 lichenicolous fungi (Abrothallus cladoniae, Acremonium lichenicola, Arthonia coronata, Epicladonia simplex, Intralichen lichenicola, Lichenochora obscuroides, Lichenoconium erodens, L. lecanorae, L. pyxidatae, Lichenosticta alcicornaria, Lichenostigma alpinum, Pyrenochaeta xanthoriae, and Syzygospora physciacearum) are new to the country. The facultatively lichenicolous fungus Taeniolina scripta is reported on lichens for the first time from Belarus.
... Anatomically the genus is characterized by bitunicate asci with four to eight, 2-to 4-celled, brown, asymmetric ascospores with clear ornamentation, usually oriented with the wider cell placed upwards within the ascus. In some species the ascospores split into part-spores within the ascus (Etayo 2002, Hawksworth 1990, Wedin 1994. The sexual morph of Abrothallus is often accompanied with the asexual morph of Vouauxiomyces-type (Hawksworth 1981 despite being known for a long time, the phylogenetic adscription of the genus has remained unresolved until recently (Pérez-ortega et al. 2014) as no clear synapomorphies with any other known genera have been found. ...
... Following characters are considered: host taxon, ascospore septation, formation of part-spores (y -formation of part-spores, n-spores remain intact), position of ascocarps on host thallus (scattered vs grouped), presence and shape of the asexual morph (n -no asexual morph reported), dimensions of ascospores and conidia (length and width; µm) and ascomata (width; µm), and visual damage caused by the fungus (n -no visual damage). All dimensions of A. stictarum are given according to Etayo (2002), of A. brattii according to Kondratyuk (1996), and dimensions of conidia of A granulatae are given according to Wedin (1994). ...
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... With regard to other coelomycete genera with lichenicolous species lacking conidiophores and with hyaline, aseptate conidia, the fungus on Psoroma hypnorum has to be compared with species of Asterophoma D. Hawksw., Bachmanniomyces D. Hawksw., Briancoppinsia Diederich, Ertz et al., Diederichia D. Hawksw., Epicladonia D. Hawksw., Lawalreea Diederich, Minuto-phoma D. Hawksw., Pseudoseptoria Speg., Subhysteropycnis Wedin & Hafellner, and Vouauxiomyces Dyko & D. Hawksw. (Hawksworth & Dyko 1979;Sutton 1980;Hawksworth 1981Hawksworth , 2003Diederich 1990;Wedin 1994;Etayo & Diederich 1996;Wedin & Hafellner 1998;Ihlen & Wedin 2005;Etayo & Sancho 2008;Etayo 2010;Diederich et al. 2012;Zhurbenko & Tugi 2013). Asterophoma can be distinguished from Phoma psoromatis by its conidioma wall composed of extremely attenuated cells projecting at the exterior, occasionally biphialidic conidiogenous cells, and subcylindrical conidia rounded at both ends; Bachmanniomyces is characterized by its holoblastic, annellate conidiogenous cells; Briancoppinsia has a K+ dark olivaceous pycnidial wall of textura intricata, I+ and K/I+ red pycnidial gel and short ampulliform conidiogenous cells; the conidiogenous cells in Diederichia are ampulliform, often indistinct, and the conidia are cylindrical, ellipsoid or irregularly shaped and obtuse at both ends; Epicladonia has holoblastic, annellate conidiogenous cells, its conidia are sometimes 1septate and genuine conidiophores are sometimes present; Lawalreea forms conidiomata without ostioles and falciform conidia; Minutophoma is characterized by conidiogenous cells forming the lower part of the pycnidial wall, often pale brown at the base, and subcylindrical conidia rounded at both ends; Pseudoseptoria has holoblastic, annellate conidiogenous cells and falcate, fusiform or cymbiform conidia; Subhysteropycnis differs in having usually densely aggregated conidiomata with irregularly rounded, elongated or slit-like ostioles, K+ dark green wall and I+ red, K/I+ blue pycnidial gel, bacilliform conidia, and is a gall inducer; Vouauxiomyces is quite distinct in having holoblastic, percurrently proliferating conidiogenous cells and sometimes weakly echinulate and occasionally slightly pigmented conidia. ...
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The new lichenicolous genus Ameroconium (dematiaceous hyphomycetes), with its type species A. cladoniae and the new lichenicolous species Phoma psoromatis (pycnidial coelomycetes), are described, discussed and illustrated. Phoma lobariae is recorded for the first time from the Arctic, Russia and Asia on Lobaria linita
... Amongst the lichenicolous coelomycetes with hyaline to sometimes pale coloured aseptate conidia the type species Epinephroma kamchatica should be Etayo & Diederich 1996;Hawksworth 1981;Hawksworth & Dyko 1979;Ihlen & Wedin 2005;Kocourkova & Hawksworth 2008;Sutton 1980;Wedin 1994). None of these has a clypeus. ...
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Fifty-one species of lichenicolous fungi are reported from Kamchatka, all but three being new to the area. Epinephroma gen. nov., Endococcus peltigericola sp. nov. (on Peltigera membranacea), Epinephroma kamchatica sp. nov. (on Nephroma parile) and Stigmidium buelliae sp. nov. (on Buellia disciformis) are described as new to science. Phoma lobariicola is new to Asia and Russia, Epicladonia stenospora, Plectocarpon peltigerae, Sphaerellothecium propinquellum and Tremella cetrariicola are new to Asia, Zwackhiomyces sphinctrinoides is new to Russia.