L. olistopi Laboulbeniomycetes (Fungi, Ascomycota) of Denmark Santamaria, Sergi Pedersen, Jan European Journal of Taxonomy 2021 2021-11-26 781 1 425 Speg. [625,963,1813,1840] Laboulbeniomycetes Laboulbeniaceae Laboulbenia Fungi Laboulbeniales 183 184 Ascomycota species olisthopi  MB#243319  Fig. 38H–I    Redia10: 55 ( Spegazzini 1914; as  L. olistopi).–     Type: “ On  Olistopus sturmiifrom Saxonyin Germany”; LPS. [Type according to Balazuc 1975a]    Diagnostic features Thallus olive brown. Cell V oval, similar in length but half as broad as cell IV, connected with septum III–IV ( Fig. 38I). Outer appendage unbranched. Inner appendage consisting of several short branches terminated by solitary or paired antheridia ( Fig. 38I) which may be replaced by elongated sterile appendages in old thalli ( Fig. 38H). Basal cell of inner appendage slightly smaller than basal cell of outer appendage. [Detailed descriptions: Balazuc 1975a; Santamaria 1998]    Distribution and hosts On species of the genus  Olisthopus(=  OdontonyxStephens, 1827) (Col. Carabidae) in Europe, Canary Islands ( Arndt & Santamaria 2004), and Madeira ( Balazuc 1975a). Records from Europe: Germany( type), Italy( Spegazzini 1914), Switzerland( Baumgartner 1923), France( Balazuc 1975a), and Spain( Santamaria 1989). Records from Poland( Majewski 2006) and Ukraine( Majewski 2008) may correspond to  L. polyphaga(see below).    Collections examined from Denmark    On  Olisthopus rotundatus(Paykull, 1790)(Col. Carabidae) DENMARK–  Lolland, Falster, Møn(LFM)• Rødbyhavn; 54°39.569′ N, 11°21.958′ E; PF55;  15 Nov. 2010;  JP158; JPdet.; ZMUC C-F-122637. –   Sydsjaelland(SZ)• Vordingborg; 55°0.395′ N, 11°54.682′ E; PF89;  23 Apr. 1990;  JPDry0050; JPdet.; ZMUC C-F-124116.    Remarks First record from Denmark. The distinctiveness of this species has been subject of debate. In the original description, Spegazzini (1914)offered a too brief diagnosis and blurred photographs of four deeply darkened thalli. Neither with the description nor with the images, the shape and layout of cell V was well-defined. Balazuc (1975a)and Santamaria (1998)described  L. olisthopiincluding a cell V as large as cell IV and connected with septum III–IV. Polish and Ukrainian thalli depicted by Majewski (2006)seem to be different from those by Balazuc and Santamaria, but according to the Polish author they are much closer to Spegazzini’s species, supporting his argument with the identity of the host,  Olisthopus sturmii(Duftschmid, 1812), which was the same as for the typefrom nearby Germany, whereas thalli from the hosts mentioned by Balazuc and Santamaria according to Majewski should belong, to other species, also because they were from Madeira and Southern European areas, far from the Central European type. Among the studied Danish material, some thalli found on  Amara apricaria(Paykull, 1790)have given us a clue to the mess involving three species:  L. olisthopi,  L. polyphagaand  L. ophoni. Thus, Majewski (1994b)classified under  L. polyphagasome Polish thalli found on  Amara(including  A. apricaria). To check Majewski’s determination we proceeded to request a loan of the  L. polyphaga typefrom the Farlow Herbarium. The typeslide of  Laboulbenia polyphagafrom FH (see explanation under  L. ophoni) includes six thalli in poor condition ( Fig. 39C). The study of these thalli convinced us that the material published by Majewski (2006)as  L. olisthopibelongs to  L. polyphaga. Furthermore, as we will explain in the paragraphs devoted to  L. ophoni, the thalli on  Amarawhich Majewski classified as  L. polyphagainstead correspond to  L. ophoni. 4988640524 On Olistopus sturmii LPS Germany Saxony 183 184 1 Saxony type 4988641363 On Olisthopus rotundatus (Paykull, 1790) 2010-11-15 ZMUC JP Denmark JP 54.659485 Rodbyhavn 1 11.365967 184 185 ZMUC C-F-122637 1 Lolland, Falster, Mon 4988641781 1990-04-23 ZMUC JP Denmark JP 55.006584 Vordingborg 1 11.911366 184 185 ZMUC C-F-124116 1 Sydsjaelland