The genus Asteromella (Fungi: Ascomycota) in Poland
Authors: Ruszkiewicz-Michalska Małgorzata 
Published: December 2016

<p>The critical revision of 59 <em>Asteromella</em> species occurring in Poland is presented, based primarily on specimens from Poland, as well as selected herbarial materials from France, Germany, Italy, Latvia, Lithuania, Romania, Slovakia, Switzerland and Ukraine. Some exsiccata, including types of <em>Asteromella carlinae</em> Petr., <em>Asteromella ludwigii</em> Petr., <em>Asteromella ovata</em> Thüm., <em>Asteromella petasitidis</em> Petr., <em>Depazea agrimoniae</em> Lasch, <em>Mycosphaerella agrimoniae</em> Syd., <em>Phyllosticta borszczowii</em> Thüm., <em>Phyllosticta cicutae</em> Lind, <em>Phyllosticta eupatoriicola</em> Kabát &amp; Bubák, <em>Phyllosticta pleurospermi</em> Died., <em>Phyllosticta salicina</em> Kabát &amp; Bubák, <em>Phyllosticta senecionis-nemorensis</em> Săvul. &amp; Sandu, <em>Phyllosticta wandae</em> Namysł. were also studied. Each species is accompanied by the information pertaining to host spectrum, morphology of conidiomata, conidiophores, conidiogenous cells and conidia, distribution in Poland and globally, as well as information on synanamorphs and teleomorph, if present.</p><p>Two species, <em>Asteromella moeszii</em> Ruszkiewicz-Michalska &amp; Mułenko spec. nov. on <em>Pulmonaria obscura</em> and <em>Asteromella rupprechtii</em> Ruszkiewicz-Michalska spec. nov. on <em>Agrimonia eupatoria</em> are described, based on Polish specimens. A new name, <em>Asteromella huubii</em> Ruszkiewicz-Michalska nom. nov., is proposed to replace <em>Asteromella angelicae</em> (Sacc.) Moesz ex Bat. &amp; Peres. Nine <em>Phyllosticta</em> and two <em>Depazea</em> species were redisposed into <em>Asteromella</em>: <em>Asteromella acetosae</em> (Sacc.) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella adoxicola</em> (Lasch) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella alnicola</em> (C. Massal.) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella bacilloides</em> (Dominik) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella prunellae</em> (Ellis &amp; Everh.) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella garbowskii</em> (Gucevič) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella lysimachiae</em> (Allesch.) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella populina</em> (Fuckel) Ruszkiewicz-Michalska, comb. nov., <em>Asteromella salicina</em> (Kabát &amp; Bubák) Ruszkiewicz-Michalska, comb. nov. Neotype of <em>Asteromella bacilloides</em> and a lectotype of <em>Asteromella adoxicola</em> are designated.</p><p>Nine species reported in the literature are not confirmed to occur in Poland; this includes two species that need to be recollected [<em>Asteromella scabiosae</em> (Kalymb.) Vanev &amp; Aa and <em>Asteromella mali</em> (Briard) Boerema &amp; Dorenb.)], as dried specimens are scarce and deficient. Affinity of <em>Asteromella confusa</em> (Bubák) Petr. to <em>Asteromella</em> vs. <em>Phoma</em> is briefly disputed. New records and new data on the distribution of <em>Asteromella</em> species in Latvia, Poland, Slovakia, Switzerland and Ukraine are also provided. Three species are reported as new to Polish funga: <em>Asteromella prunellae</em>, <em>Asteromella melampyrina</em> and <em>Asteromella moeszii</em>.</p>