Laboulbenia olisthopi Speg.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 184-185

Laboulbenia olisthopi Speg.

MB#243319

Fig. 38H–I

Redia 10: 55 ( Spegazzini 1914; as L. olistopi ). –

Type: “ On Olistopus sturmii from Saxony in 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 (= Odontonyx Stephens, 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; JP 158; JP det.; ZMUC C-F-122637 . – Sydsjaelland (SZ) • Vordingborg ; 55°0.395′ N, 11°54.682′ E; PF89; 23 Apr. 1990; JP Dry0050; JP det.; 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. olisthopi including 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 type from 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. polyphaga and L. ophoni . Thus, Majewski (1994b) classified under L. polyphaga some Polish thalli found on Amara (including A. apricaria ). To check Majewski’s determination we proceeded to request a loan of the L. polyphaga type from the Farlow Herbarium. The type slide of Laboulbenia polyphaga from 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. olisthopi belongs to L. polyphaga . Furthermore, as we will explain in the paragraphs devoted to L. ophoni , the thalli on Amara which Majewski classified as L. polyphaga instead correspond to L. ophoni .

Figures

Fig. 38. Laboulbenia spp. A–D. L. murmanica Huldén. A–C. Mature thalli showing constriction at septum II–VI/III (arrows). D. Immature thallus showing undamaged appendage. – E–G. L. notiophili Cépède & F.Picard. E, G. Mature thalli. F. Inner appendage in detail showing antheridia (an) and basal cell of inner appendage (bc ia). – H–I. L. olisthopi Speg. H. Mature thallus. I. Two immature thalli with labelled cell V. Scale bars: A–E, G–I = 50 µm; F = 25 µm. Photographs from slides ZMUC C-F-123145 (A–B), ZMUC C-F-123271 (C), ZMUC C-F-123651 (D), ZMUC C-F-122541 (E–F), ZMUC C-F-122545 (G), ZMUC C-F-122637 (H–I).

Fig. 39. Laboulbenia spp. A–B. L. oodiphila Huldén. Mature thalli. – C. L. polyphaga Thaxt. Broken mature thallus from type slide kept in FH, collected on Olisthopus parmatus. – D–G. L. ophoni Thaxt. D–E. Mature thalli from Harpalus and Ophonus, respectively. F. Immature thallus showing appendages in detail and labelled basal cell of inner appendage (bc ia). G. Mature thallus from Amara apricaria. Scale bars: 50 µm. Photographs from slides ZMUC C-F-124118 (A–B), FH8460 (C) (lectotype), ZMUC C-F-122500 (D), ZMUC C-F-124115 (E–F), ZMUC C-F-122776 (G).