Stigmatomyces majewskii H.L.Dainat, Manier & Balazuc

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 264-266

Stigmatomyces majewskii H.L.Dainat, Manier & Balazuc

MB#324129

Fig. 60B–E

Bulletin de la Société Mycologique de France 90 (3): 171 ( Dainat et al. 1974). – Type: [Not designated] [In ??] “Hôtes: Drosophila obscura Fallèn , D. subobscura Collin ... Clapiers (Hérault), lisières vignes et pinèdes toute l’année. Penzé (Finistère): 27.7.1961. Cazaux (Gironde) 8.7.1961. Type Cl 10.70 coll. H. Dainat”. [ France]

Diagnostic features

Basal cell of appendage small, distally darker, supporting a series of four cells, the lower flattened, dark and sterile, the others bearing paired antheridia on their outer side, except for the upper cell which gives rise to three antheridia, the distalmost of which is spinose ( Fig. 60D , sx). Perithecium with an oval, brownish venter, and a well-distinguished, very elongated neck, which tapers distally into a distinct, asymmetrical tip which shows two protruding lips ( Fig. 60E ).

Distribution and hosts

Reported from France (type), Czech Republic ( Rossi et al. 2010), the Netherlands ( Haelewaters & De Kesel 2010), Portugal, Zimbabwe, Taiwan, Germany and United Kingdom ( Rossi et al. 2013). According to Rossi et al. (2010) the record of S. majewskii on Scaptodrosophila Duda, 1923 from Austria is erroneous. Grows on species of the genus Drosophila subgenus Sophophora ( Diptera Drosophilidae ).

Collections examined from Denmark

On Drosophila cf. bifasciata Pomini, 1940 ( Diptera Drosophilidae ) DENMARK – Nordøstsjaelland (NEZ) • Pinseskoven ; 55°35.839′ N, 12°33.250′ E; UB46; 8–24 Jun. 2017; W. Gritsch 1180; W. Gritsch det.; ZMUC C-F-123704 .

On Drosophila obscura Fallén, 1823 ( Diptera Drosophilidae ) DENMARK – Nordøstsjaelland (NEZ) • Gentofte ; 55°44.005′ N, 12°33.020′ E; UB47; 27–28 Jun. 2018; H. Enghoff 1182; V. Michelsen det.; ZMUC C-F-123706 • Pinseskoven ; 55°35.839′ N, 12°33.250′ E; UB46; 8–24 Jun. 2017; W. Gritsch 1181; W. Gritsch det.; ZMUC C-F-123705 • ibid.; 11–26 Jun. 2018; W. Gritsch 1204; W. Gritsch det.; ZMUC C-F-123731 .

Remarks

First record from Denmark. See under S. entomophilus for comparison and additional remarks.

Figures

Fig. 60. Stigmatomyces spp. A. S. limosinae Thaxt. Mature thallus. – B–E. S. majewskii H.L.Dainat, Manier & Balazuc. B–C. Mature thalli. D. Primary appendage in detail with labelled spinous process from the original spore apex (sx). E. Perithecial tip in detail. – F–H. S. platensis Speg. Mature thalli showing protrusion of cell VII (arrows). Scale bars: A–C, E–H = 50 µm; D = 25 µm. Photographs from slides ZMUC C-F-123718 (A), ZMUC C-F-123705 (B, D–E), ZMUC C-F-123731 (C), ZMUC C-F- 123713 (F–H).