Tiarosporella paludosa (Sacc. & Fiori) Höhn., Berichte der Deutschen Botanischen Gesellschaft

Crous, Pedro W., Müller, Michael M., Sánchez, Romina M., Giordano, Lucrecia, Bianchinotti, M. Virginia, Anderson, Freda E. & Groenewald, Johannes Z., 2015, Resolving Tiarosporella spp. allied to Botryosphaeriaceae and Phacidiaceae, Phytotaxa 202 (2), pp. 73-93 : 89-90

Tiarosporella paludosa (Sacc. & Fiori) Höhn., Berichte der Deutschen Botanischen Gesellschaft 37: 159 (1919); Fig. 8

Basionym: Neottiospora paludosa Sacc. & Fiori, Hedwigia Beiblätter 38: 137 (1899)

Additional synonyms listed by Nag Raj (1993).

Foliicolous. Conidiomata pycnidial, separate, immersed, globose to depressed, 200–350 μm diam, unilocular, dark brown, with central substomatal ostiole; wall of brown textura angularis, 20–40 μm thick. Conidiophores reduced to conidiogenous cells lining the inner cavity. Conidiogenous cells hyaline, smooth, subcylindrical to ampulliform, encased in mucus, 6–15 × 1.5–3.5 μm, proliferating percurrently near the apex. Conidia hyaline, smooth, solitary, subcylindrical to subclavate, apex subobtuse, base truncate, 2–3 μm diam, rarely with marginal frill, 1 μm long; conidia aseptate, widest in upper third of conidium, (22–)30–38(–45) × (4–)5–6(–7) μm, bearing 2–4 tentaculiform, undulate apical mucoid appendages. The conidium is initially covered in a mucoid sheath, which splits longitudinally, resulting in apical tentaculiform appendages.

Culture characteristics:— Colonies fast growing, covering the dish in 2 wk; grey olivaceous on surface and olivaceous black in reverse, with fluffy aerial mycelium and even, feathery margins.

Specimens examined:— GERMANY. Berlin, Zahlendorf, on leaves of Eriophorum polystachium, Oct. 1895 , P. Sydow (holotype in FH, isotype DAOM 130546). NETHERLANDS. Winterswijk in the Korenburgerveen, Latitude 51.990133, Longitude 6.664013, on Trichophorum cespitosum subsp. germanicum , 28 Apr. 2013, W. Quaedvlieg (epitype designated here CBS H-21855 MBT200481, culture ex-epitype CPC 22701, 22702 = CBS 138577). SWEDEN. Åland, Eckerö par., on Eleocharis palustris , 14 Sep. 1990, K. & L. Holm, UPSC 3256 = CBS 114650.

Notes:— Tiarosporella paludosa occurs rather commonly in Germany on Carex spp. , Eriophorum polystachium and Trichophorum cespitosum (= Scirpus caespitosus ) ( Sutton 1980, Nag Raj 1993), and is obviously widely distributed in Europe. It is also known to occur in Canada and the USA ( Nag Raj 1993). The present collection closely matches the morphology of the holotype, and is also from Germany, where this taxon occurs commonly on Carex , Eriophorum and Trichophorum ( Sutton 1980, Nag Raj 1993). Phylogenetically it is identical to another culture of T. paludosa from Eleocharis palustris (CBS 114650; sterile) collected in Sweden ( Table 1), justifying CBS H-21855 as an excellent epitype specimen for the taxon, which also fixes the genetic application of the name.

Figures

FIGURE 8. Tiarosporella paludosa (CPC 22701). A, B. Conidiomata on PNA. C–E. Conidiogenous cells. F, G. Conidia. Scale bars: A, B = 250 μm, all others = 10 μm.