Arthrinium marii Larrondo & Calvo, Mycologia 82(3): 397 (1990)
Index Fungorum number: IF127774; Facesofungi number: FoF 06384
Holotype: SPAIN, from atmosphere, pharmaceutical excipients, home dust and beach sands, IMI 326872, ex-type culture, CBS 497.90.
Associated with dead stems of Ammophila arenaria. Sexual morph: Undetermined. Asexual morph: Mycelium comprising 1–4 μm diam., smooth, hyaline, septate branched, hyphae. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 5–15 × 2–5 μm, basauxic, arising from hyphae and aggregated in clusters on hyphae, hyaline, smooth, ampulliform. Conidia 4–14 × 3–7 μm (x̄ = 7.2 × 5.2 μm, n = 60), brown to dark brown, smooth, globose to elongate in surface view, aseptate, lenticular in side view, with pale equatorial slit.
Culture characteristics: Colonies growing on PDA reaching 50 mm diam. after 6 days at 25 °C, circular, flat, dense, surface white to grayish, reverse smoke-grey to olivaceous grey, white at the margin, smooth surface with edge entire to slightly curl.
Material examined: ITALY, Province of Ravenna, Lido di Dante, on dead aerial stems of Ammophila arenaria (L.) Link (Poaceae), 11 February 2015, E. Camporesi, IT 2376H (MFLU 15–1030), living culture MFLUCC 16–0282; ibid., IT 2376H2 (MFLU 18–0759), living culture MFLUCC 16–0283.
Known host and distribution: Beach sand, on stems of Phragmites australis (Cav.) Trin. ex Steud., on leaf of Beta vulgaris L., on culm of Arundinaria hindsii, on stems of Ammophila arenaria (L.) Link worldwide (Farr and Rossman 2020).
GenBank Numbers: MFLUCC 16–0282: ITS: MH109526, TEF1-α: MH206166,
MFLUCC 16–0283: ITS: MH109527, TEF1-α: MH220419.
Note: In the present phylogenetic analysis, MFLUCC 16–0283 clustered with other strains of A. marii including the ex-type strain (CBS 497.90). There is also no significant morphological divergence compared to the type (Crous and Groenewald 2013). Arthrinium marii was reported on several different hosts in Europe and Asia, while most of the records were from species of Poaceae (Farr and Rossman 2020). This is the first report of A. marii on stems of Ammophila arenaria (Poaceae) in Italy.
Figure x. Arthrinium marii (MFLU 15–1030). a Colony on PDA. b–d Conidiogenous cells giving rise to conidia. e–h Conidia (note elongated conidium in f). Scale bars: b = 5 μm, c–e, g–h = 10 μm, f = 20 μm
Crous PW, Groenewald JZ 2013 – A phylogenetic re-evaluation of Arthrinium. IMA Fungus 4, 133–154.
Farr DF, Rossman AY 2020 – Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. http://nt.ars-grin.gov/fungaldatabases/.
Hyde KD, Dong Y, Phookamsak R, Jeewon R et al. 2020 – Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 16, 1–273.
Last Update: 11 June 2021