Arthrinium puccinioides Kunze & J.C. Schmidt, Mykologische (Leizpig) 2: 103 (1823)

Pintos, Angel, Alvarado, Pablo, Planas, Juan & Jarling, Rene, 2019, Six new species of Arthrinium from Europe and notes about A. caricicola and other species found in Carex spp. hosts, MycoKeys 49, pp. 15-48 : 15

Arthrinium puccinioides Kunze & J.C. Schmidt, Mykologische (Leizpig) 2: 103 (1823) Fig. 13

Conoplea puccinioides DE Candolle, 1905, Flore Francaise, Ed. 3, Tome 2, p.73, ex Mérat, Novuvelle Flore des environs de Paris, 1821, p. 16.

Goniosporium puccinioides (Kunze & J. C.Schmidt) Link, in Willdenow, Sp.pl., Edn 4 6(1): 44 (1824).

Gonatosporium puccinioides (Kunze & J. C.Schmidt) Corda, Icon. Fung. (Prague) 3:8 (1839).

Description.

Asexual morph: Mycelium consisting on smooth hyaline, branched, septate hyphae measuring 1.5-5 µm in diameter. Colonies are small, rounded or ovoid, dark brown, 50-400 µm in diameter. Conidiophore mother cells subspherical, lageniform or barrel-shaped, 4-5 × 3-5 µm (n = 30). Conidiophores cylindrical, straight or flexuous, septate, hyaline excepting for the thick brown or dark brown transversal septa, 20-140 × 3-4 µm (n = 30). Conidiogenous cells cylindrical, occurring between the conidiophore septa, 0.9-1.8 µm. Conidia dark brown, smooth, polygonal with rounded angles to hemispherical, measuring (8 –)9–11(– 12) × 8-9 µm, with one or two concentric pale rings. Sterile cells spherical, triangular or polygonal, with refractive bodies inside, paler than conidia, 6-9 µm in diameter. Culture characteristics colonies flat spreading on MEA 2%, with moderate aerial mycelium, reverse whitish, no esporulate on culture.

Notes.

Arthrinium puccinioides is the only species of Arthrinium with polygonal conida. It shows a genetic relationship with other species found in Carex sp. hosts, such as A. caricicola , A. curvatum var. minus , A. japonicum or A. sporophleum . The present sample fits the original description of A. puccinioides by Kunze and Schmidt (1823) as well as those by Ellis et al. (1951), Ellis (1965), and Scheuer (1996).

Specimens examined.

Germany: Berlin: Köpenick, Stellingdamm, on dead leaves of Carex arenaria , 26 April 2017, R. Jarling (MA-Fungi 91746, AP26418).